From patchwork Mon Aug 7 11:08:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712904 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2532C001DB for ; Mon, 7 Aug 2023 11:11:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231955AbjHGLLC (ORCPT ); Mon, 7 Aug 2023 07:11:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47538 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231901AbjHGLKi (ORCPT ); Mon, 7 Aug 2023 07:10:38 -0400 Received: from mail-pg1-x52e.google.com (mail-pg1-x52e.google.com [IPv6:2607:f8b0:4864:20::52e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 759E3172C for ; Mon, 7 Aug 2023 04:10:09 -0700 (PDT) Received: by mail-pg1-x52e.google.com with SMTP id 41be03b00d2f7-55badd6d6feso571069a12.1 for ; Mon, 07 Aug 2023 04:10:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406609; x=1692011409; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=r8W8qq2Uz0spC2GoySlMERPhgmOL8aWRmiOXTDM010g=; b=LtcpivNSr/5U6x0m/uiyeqUuM2dtsqsVmyslCvnMZ+TbsDLmyfYCok7TOqfFwU4aou suPwxQHD97VI0Q62GW+ZYHDc8tjkHAC6Y2CfDY4CzUPMlkJryxFMZeRg2u77WPUScUma /UWc/sCeR8W9qQ3wk0oPqkWmTEZmPd4YXzSaovoOZwWfn9s/VibhxnVRbQAxTTT4rsLS 7EPkGC2ZgyKx21jg/v6bd406CHIloRAPbtMcp+52o9Mv0AXgKZgqXOlA0BowU0u6XLn9 g3j+asxGnqU4OhqCycxU0aToYArdbvRqg5AMoRMXcXqSNLhcPxtT3QmhYn/OoV2pniV3 od0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406609; x=1692011409; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=r8W8qq2Uz0spC2GoySlMERPhgmOL8aWRmiOXTDM010g=; b=Jz7EWl8kcgvUz4NrwoqPYIuF6PFa0mwjMbVWzeUTqUctdn0qcc+deiwfaqTC26eiU7 /fyuFkC2Xw4BgDWSv8auGF0YaWyHevndZX1vszgWLnHsPltSQ6PNFxKsfnvAdh/Avt9Y sB3RRXUqAAnjUB/cnTlnisTvrc9S92tCd2OMKhMZ+BwgHoSED1Mdl/XbfPGBvv4B6WNv yc+f/Z/cjIi4TC08YqBlnpqMulHODBs0qN73SyUOjQXtUhxzj57KfUToaCn8dy5y8+g1 2YDdcQn6jbdMneQPZFGFfdXL+9QPp/exQuFlIJ9iJlim+vEwOB/Fp9ml4piRQkSvlNFf IM5Q== X-Gm-Message-State: ABy/qLZSicUwWSSg6aUFrsIXjaxBNsGfKwC1Qx0C66q42KYloyGYdpo9 306aMl39A+qXZ4dkT4tCjibAzA== X-Google-Smtp-Source: APBJJlH4Xq2ZH2mKI5CfuqTuY77FQCtuH4PGEB2vg3tzfU2CpFxEqGweFj8X5L0soAOYNhp1I46kQg== X-Received: by 2002:a17:90a:4104:b0:25c:1ad3:a4a1 with SMTP id u4-20020a17090a410400b0025c1ad3a4a1mr24586808pjf.1.1691406608964; Mon, 07 Aug 2023 04:10:08 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.09.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:10:08 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 01/48] mm: move some shrinker-related function declarations to mm/internal.h Date: Mon, 7 Aug 2023 19:08:49 +0800 Message-Id: <20230807110936.21819-2-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The following functions are only used inside the mm subsystem, so it's better to move their declarations to the mm/internal.h file. 1. shrinker_debugfs_add() 2. shrinker_debugfs_detach() 3. shrinker_debugfs_remove() Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- include/linux/shrinker.h | 19 ------------------- mm/internal.h | 28 ++++++++++++++++++++++++++++ 2 files changed, 28 insertions(+), 19 deletions(-) diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index 224293b2dd06..8dc15aa37410 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -106,28 +106,9 @@ extern void free_prealloced_shrinker(struct shrinker *shrinker); extern void synchronize_shrinkers(void); #ifdef CONFIG_SHRINKER_DEBUG -extern int shrinker_debugfs_add(struct shrinker *shrinker); -extern struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, - int *debugfs_id); -extern void shrinker_debugfs_remove(struct dentry *debugfs_entry, - int debugfs_id); extern int __printf(2, 3) shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...); #else /* CONFIG_SHRINKER_DEBUG */ -static inline int shrinker_debugfs_add(struct shrinker *shrinker) -{ - return 0; -} -static inline struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, - int *debugfs_id) -{ - *debugfs_id = -1; - return NULL; -} -static inline void shrinker_debugfs_remove(struct dentry *debugfs_entry, - int debugfs_id) -{ -} static inline __printf(2, 3) int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...) { diff --git a/mm/internal.h b/mm/internal.h index 154da4f0d557..6f21926393af 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1143,4 +1143,32 @@ struct vma_prepare { struct vm_area_struct *remove; struct vm_area_struct *remove2; }; + +/* + * shrinker related functions + */ + +#ifdef CONFIG_SHRINKER_DEBUG +extern int shrinker_debugfs_add(struct shrinker *shrinker); +extern struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, + int *debugfs_id); +extern void shrinker_debugfs_remove(struct dentry *debugfs_entry, + int debugfs_id); +#else /* CONFIG_SHRINKER_DEBUG */ +static inline int shrinker_debugfs_add(struct shrinker *shrinker) +{ + return 0; +} +static inline struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, + int *debugfs_id) +{ + *debugfs_id = -1; + return NULL; +} +static inline void shrinker_debugfs_remove(struct dentry *debugfs_entry, + int debugfs_id) +{ +} +#endif /* CONFIG_SHRINKER_DEBUG */ + #endif /* __MM_INTERNAL_H */ From patchwork Mon Aug 7 11:08:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711240 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 533FBC04FE0 for ; Mon, 7 Aug 2023 11:11:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231948AbjHGLLJ (ORCPT ); Mon, 7 Aug 2023 07:11:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230473AbjHGLK5 (ORCPT ); Mon, 7 Aug 2023 07:10:57 -0400 Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E88B9171A for ; Mon, 7 Aug 2023 04:10:22 -0700 (PDT) Received: by mail-pf1-x42f.google.com with SMTP id d2e1a72fcca58-6872c60b572so994486b3a.1 for ; Mon, 07 Aug 2023 04:10:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406622; x=1692011422; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=GEi4MYuk0OEYflth0Mb1DlFyZuiRlqXPhzGhOI28yow=; b=BEvTj+xwW+T88pT01ic9HCjfMsNsUtdxPovUDtMtpNRFgKOF7OPKZlfnwvdpMrZsO1 yoJN3VDoQT6bqGjHEFD+GOFUbTFyPWQ9AmgWQHHMtUKtDFwB2AaCD8h8ed/2/nFlj6R/ H6RbchdxL8KOcvrs5+S0zZOQ7z5kmO5+1Ob9A43qfRUa8zWOsgqkDlWkIZ6Nce8P3hyT 6WUFOueyKbkU0/JQe7kyXIgtpN16Nt1532HkzF1M6pOxV7CrOQJaiVOX1MvieAVDT9mZ 7Wp39SMBYWooErXp+bNrum847BTmBIxZLX39IVOZTRIPZyaqqeRkUBu+bq48TNvJ2qgU oNtg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406622; x=1692011422; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=GEi4MYuk0OEYflth0Mb1DlFyZuiRlqXPhzGhOI28yow=; b=N4gXGklbmEIROx4d6R4yYEIKYLn11QrW5TzxOQM/f/7u2gBUWEjXxgZgInoJjZUjg6 mlSs04rvEpEALPm1yCIn0pbCnGzsvyU4y3KX/+xOzHLOan8ovV36Ca1HZn7VWa1ffrqy b8SiZmjK7cfOkNrfTZl83+oq6Md69aKjsD5XIrBaUQVjONSfTcATjx0Ifz8li79GILIJ uPQwysYYWpmTXH4uaQUMsjQ4vInt8Lpk7fgH4uZKXQqFHwm9teP5m45eK4mzFaw30ogv ZEATz6MivxcqOLFwEo/qBKHyq9k877f1/+dS6sYBcwPaCI+CD/+VW1q4YKEPe6EaOfsH v4oA== X-Gm-Message-State: ABy/qLYdGd26jP3KHTLLx4gDM1V96agB6OHylz54F8DpQECihqYQq9uK 7AvdeNP7odWB9ZwOcyiy0F1eug== X-Google-Smtp-Source: APBJJlH6EApx+wddxarWw2nzmVwQ6n81Kim8/orhAtf/liUQAlYr06Fft6gh/8UZFDYZK5CJyxwGZw== X-Received: by 2002:a17:903:22c6:b0:1b8:2ba0:c9a8 with SMTP id y6-20020a17090322c600b001b82ba0c9a8mr33072978plg.2.1691406622170; Mon, 07 Aug 2023 04:10:22 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.10.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:10:21 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 02/48] mm: vmscan: move shrinker-related code into a separate file Date: Mon, 7 Aug 2023 19:08:50 +0800 Message-Id: <20230807110936.21819-3-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The mm/vmscan.c file is too large, so separate the shrinker-related code from it into a separate file. No functional changes. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- mm/Makefile | 4 +- mm/internal.h | 2 + mm/shrinker.c | 709 ++++++++++++++++++++++++++++++++++++++++++++++++++ mm/vmscan.c | 701 ------------------------------------------------- 4 files changed, 713 insertions(+), 703 deletions(-) create mode 100644 mm/shrinker.c diff --git a/mm/Makefile b/mm/Makefile index ec65984e2ade..33873c8aedb3 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -48,8 +48,8 @@ endif obj-y := filemap.o mempool.o oom_kill.o fadvise.o \ maccess.o page-writeback.o folio-compat.o \ - readahead.o swap.o truncate.o vmscan.o shmem.o \ - util.o mmzone.o vmstat.o backing-dev.o \ + readahead.o swap.o truncate.o vmscan.o shrinker.o \ + shmem.o util.o mmzone.o vmstat.o backing-dev.o \ mm_init.o percpu.o slab_common.o \ compaction.o show_mem.o shmem_quota.o\ interval_tree.o list_lru.o workingset.o \ diff --git a/mm/internal.h b/mm/internal.h index 6f21926393af..b98c29f0a471 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1147,6 +1147,8 @@ struct vma_prepare { /* * shrinker related functions */ +unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, + int priority); #ifdef CONFIG_SHRINKER_DEBUG extern int shrinker_debugfs_add(struct shrinker *shrinker); diff --git a/mm/shrinker.c b/mm/shrinker.c new file mode 100644 index 000000000000..043c87ccfab4 --- /dev/null +++ b/mm/shrinker.c @@ -0,0 +1,709 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include + +#include "internal.h" + +LIST_HEAD(shrinker_list); +DECLARE_RWSEM(shrinker_rwsem); + +#ifdef CONFIG_MEMCG +static int shrinker_nr_max; + +/* The shrinker_info is expanded in a batch of BITS_PER_LONG */ +static inline int shrinker_map_size(int nr_items) +{ + return (DIV_ROUND_UP(nr_items, BITS_PER_LONG) * sizeof(unsigned long)); +} + +static inline int shrinker_defer_size(int nr_items) +{ + return (round_up(nr_items, BITS_PER_LONG) * sizeof(atomic_long_t)); +} + +void free_shrinker_info(struct mem_cgroup *memcg) +{ + struct mem_cgroup_per_node *pn; + struct shrinker_info *info; + int nid; + + for_each_node(nid) { + pn = memcg->nodeinfo[nid]; + info = rcu_dereference_protected(pn->shrinker_info, true); + kvfree(info); + rcu_assign_pointer(pn->shrinker_info, NULL); + } +} + +int alloc_shrinker_info(struct mem_cgroup *memcg) +{ + struct shrinker_info *info; + int nid, size, ret = 0; + int map_size, defer_size = 0; + + down_write(&shrinker_rwsem); + map_size = shrinker_map_size(shrinker_nr_max); + defer_size = shrinker_defer_size(shrinker_nr_max); + size = map_size + defer_size; + for_each_node(nid) { + info = kvzalloc_node(sizeof(*info) + size, GFP_KERNEL, nid); + if (!info) { + free_shrinker_info(memcg); + ret = -ENOMEM; + break; + } + info->nr_deferred = (atomic_long_t *)(info + 1); + info->map = (void *)info->nr_deferred + defer_size; + info->map_nr_max = shrinker_nr_max; + rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, info); + } + up_write(&shrinker_rwsem); + + return ret; +} + +static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, + int nid) +{ + return rcu_dereference_protected(memcg->nodeinfo[nid]->shrinker_info, + lockdep_is_held(&shrinker_rwsem)); +} + +static int expand_one_shrinker_info(struct mem_cgroup *memcg, + int map_size, int defer_size, + int old_map_size, int old_defer_size, + int new_nr_max) +{ + struct shrinker_info *new, *old; + struct mem_cgroup_per_node *pn; + int nid; + int size = map_size + defer_size; + + for_each_node(nid) { + pn = memcg->nodeinfo[nid]; + old = shrinker_info_protected(memcg, nid); + /* Not yet online memcg */ + if (!old) + return 0; + + /* Already expanded this shrinker_info */ + if (new_nr_max <= old->map_nr_max) + continue; + + new = kvmalloc_node(sizeof(*new) + size, GFP_KERNEL, nid); + if (!new) + return -ENOMEM; + + new->nr_deferred = (atomic_long_t *)(new + 1); + new->map = (void *)new->nr_deferred + defer_size; + new->map_nr_max = new_nr_max; + + /* map: set all old bits, clear all new bits */ + memset(new->map, (int)0xff, old_map_size); + memset((void *)new->map + old_map_size, 0, map_size - old_map_size); + /* nr_deferred: copy old values, clear all new values */ + memcpy(new->nr_deferred, old->nr_deferred, old_defer_size); + memset((void *)new->nr_deferred + old_defer_size, 0, + defer_size - old_defer_size); + + rcu_assign_pointer(pn->shrinker_info, new); + kvfree_rcu(old, rcu); + } + + return 0; +} + +static int expand_shrinker_info(int new_id) +{ + int ret = 0; + int new_nr_max = round_up(new_id + 1, BITS_PER_LONG); + int map_size, defer_size = 0; + int old_map_size, old_defer_size = 0; + struct mem_cgroup *memcg; + + if (!root_mem_cgroup) + goto out; + + lockdep_assert_held(&shrinker_rwsem); + + map_size = shrinker_map_size(new_nr_max); + defer_size = shrinker_defer_size(new_nr_max); + old_map_size = shrinker_map_size(shrinker_nr_max); + old_defer_size = shrinker_defer_size(shrinker_nr_max); + + memcg = mem_cgroup_iter(NULL, NULL, NULL); + do { + ret = expand_one_shrinker_info(memcg, map_size, defer_size, + old_map_size, old_defer_size, + new_nr_max); + if (ret) { + mem_cgroup_iter_break(NULL, memcg); + goto out; + } + } while ((memcg = mem_cgroup_iter(NULL, memcg, NULL)) != NULL); +out: + if (!ret) + shrinker_nr_max = new_nr_max; + + return ret; +} + +void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) +{ + if (shrinker_id >= 0 && memcg && !mem_cgroup_is_root(memcg)) { + struct shrinker_info *info; + + rcu_read_lock(); + info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); + if (!WARN_ON_ONCE(shrinker_id >= info->map_nr_max)) { + /* Pairs with smp mb in shrink_slab() */ + smp_mb__before_atomic(); + set_bit(shrinker_id, info->map); + } + rcu_read_unlock(); + } +} + +static DEFINE_IDR(shrinker_idr); + +static int prealloc_memcg_shrinker(struct shrinker *shrinker) +{ + int id, ret = -ENOMEM; + + if (mem_cgroup_disabled()) + return -ENOSYS; + + down_write(&shrinker_rwsem); + /* This may call shrinker, so it must use down_read_trylock() */ + id = idr_alloc(&shrinker_idr, shrinker, 0, 0, GFP_KERNEL); + if (id < 0) + goto unlock; + + if (id >= shrinker_nr_max) { + if (expand_shrinker_info(id)) { + idr_remove(&shrinker_idr, id); + goto unlock; + } + } + shrinker->id = id; + ret = 0; +unlock: + up_write(&shrinker_rwsem); + return ret; +} + +static void unregister_memcg_shrinker(struct shrinker *shrinker) +{ + int id = shrinker->id; + + BUG_ON(id < 0); + + lockdep_assert_held(&shrinker_rwsem); + + idr_remove(&shrinker_idr, id); +} + +static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, + struct mem_cgroup *memcg) +{ + struct shrinker_info *info; + + info = shrinker_info_protected(memcg, nid); + return atomic_long_xchg(&info->nr_deferred[shrinker->id], 0); +} + +static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, + struct mem_cgroup *memcg) +{ + struct shrinker_info *info; + + info = shrinker_info_protected(memcg, nid); + return atomic_long_add_return(nr, &info->nr_deferred[shrinker->id]); +} + +void reparent_shrinker_deferred(struct mem_cgroup *memcg) +{ + int i, nid; + long nr; + struct mem_cgroup *parent; + struct shrinker_info *child_info, *parent_info; + + parent = parent_mem_cgroup(memcg); + if (!parent) + parent = root_mem_cgroup; + + /* Prevent from concurrent shrinker_info expand */ + down_read(&shrinker_rwsem); + for_each_node(nid) { + child_info = shrinker_info_protected(memcg, nid); + parent_info = shrinker_info_protected(parent, nid); + for (i = 0; i < child_info->map_nr_max; i++) { + nr = atomic_long_read(&child_info->nr_deferred[i]); + atomic_long_add(nr, &parent_info->nr_deferred[i]); + } + } + up_read(&shrinker_rwsem); +} +#else +static int prealloc_memcg_shrinker(struct shrinker *shrinker) +{ + return -ENOSYS; +} + +static void unregister_memcg_shrinker(struct shrinker *shrinker) +{ +} + +static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, + struct mem_cgroup *memcg) +{ + return 0; +} + +static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, + struct mem_cgroup *memcg) +{ + return 0; +} +#endif /* CONFIG_MEMCG */ + +static long xchg_nr_deferred(struct shrinker *shrinker, + struct shrink_control *sc) +{ + int nid = sc->nid; + + if (!(shrinker->flags & SHRINKER_NUMA_AWARE)) + nid = 0; + + if (sc->memcg && + (shrinker->flags & SHRINKER_MEMCG_AWARE)) + return xchg_nr_deferred_memcg(nid, shrinker, + sc->memcg); + + return atomic_long_xchg(&shrinker->nr_deferred[nid], 0); +} + + +static long add_nr_deferred(long nr, struct shrinker *shrinker, + struct shrink_control *sc) +{ + int nid = sc->nid; + + if (!(shrinker->flags & SHRINKER_NUMA_AWARE)) + nid = 0; + + if (sc->memcg && + (shrinker->flags & SHRINKER_MEMCG_AWARE)) + return add_nr_deferred_memcg(nr, nid, shrinker, + sc->memcg); + + return atomic_long_add_return(nr, &shrinker->nr_deferred[nid]); +} + +#define SHRINK_BATCH 128 + +static unsigned long do_shrink_slab(struct shrink_control *shrinkctl, + struct shrinker *shrinker, int priority) +{ + unsigned long freed = 0; + unsigned long long delta; + long total_scan; + long freeable; + long nr; + long new_nr; + long batch_size = shrinker->batch ? shrinker->batch + : SHRINK_BATCH; + long scanned = 0, next_deferred; + + freeable = shrinker->count_objects(shrinker, shrinkctl); + if (freeable == 0 || freeable == SHRINK_EMPTY) + return freeable; + + /* + * copy the current shrinker scan count into a local variable + * and zero it so that other concurrent shrinker invocations + * don't also do this scanning work. + */ + nr = xchg_nr_deferred(shrinker, shrinkctl); + + if (shrinker->seeks) { + delta = freeable >> priority; + delta *= 4; + do_div(delta, shrinker->seeks); + } else { + /* + * These objects don't require any IO to create. Trim + * them aggressively under memory pressure to keep + * them from causing refetches in the IO caches. + */ + delta = freeable / 2; + } + + total_scan = nr >> priority; + total_scan += delta; + total_scan = min(total_scan, (2 * freeable)); + + trace_mm_shrink_slab_start(shrinker, shrinkctl, nr, + freeable, delta, total_scan, priority); + + /* + * Normally, we should not scan less than batch_size objects in one + * pass to avoid too frequent shrinker calls, but if the slab has less + * than batch_size objects in total and we are really tight on memory, + * we will try to reclaim all available objects, otherwise we can end + * up failing allocations although there are plenty of reclaimable + * objects spread over several slabs with usage less than the + * batch_size. + * + * We detect the "tight on memory" situations by looking at the total + * number of objects we want to scan (total_scan). If it is greater + * than the total number of objects on slab (freeable), we must be + * scanning at high prio and therefore should try to reclaim as much as + * possible. + */ + while (total_scan >= batch_size || + total_scan >= freeable) { + unsigned long ret; + unsigned long nr_to_scan = min(batch_size, total_scan); + + shrinkctl->nr_to_scan = nr_to_scan; + shrinkctl->nr_scanned = nr_to_scan; + ret = shrinker->scan_objects(shrinker, shrinkctl); + if (ret == SHRINK_STOP) + break; + freed += ret; + + count_vm_events(SLABS_SCANNED, shrinkctl->nr_scanned); + total_scan -= shrinkctl->nr_scanned; + scanned += shrinkctl->nr_scanned; + + cond_resched(); + } + + /* + * The deferred work is increased by any new work (delta) that wasn't + * done, decreased by old deferred work that was done now. + * + * And it is capped to two times of the freeable items. + */ + next_deferred = max_t(long, (nr + delta - scanned), 0); + next_deferred = min(next_deferred, (2 * freeable)); + + /* + * move the unused scan count back into the shrinker in a + * manner that handles concurrent updates. + */ + new_nr = add_nr_deferred(next_deferred, shrinker, shrinkctl); + + trace_mm_shrink_slab_end(shrinker, shrinkctl->nid, freed, nr, new_nr, total_scan); + return freed; +} + +#ifdef CONFIG_MEMCG +static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, + struct mem_cgroup *memcg, int priority) +{ + struct shrinker_info *info; + unsigned long ret, freed = 0; + int i; + + if (!mem_cgroup_online(memcg)) + return 0; + + if (!down_read_trylock(&shrinker_rwsem)) + return 0; + + info = shrinker_info_protected(memcg, nid); + if (unlikely(!info)) + goto unlock; + + for_each_set_bit(i, info->map, info->map_nr_max) { + struct shrink_control sc = { + .gfp_mask = gfp_mask, + .nid = nid, + .memcg = memcg, + }; + struct shrinker *shrinker; + + shrinker = idr_find(&shrinker_idr, i); + if (unlikely(!shrinker || !(shrinker->flags & SHRINKER_REGISTERED))) { + if (!shrinker) + clear_bit(i, info->map); + continue; + } + + /* Call non-slab shrinkers even though kmem is disabled */ + if (!memcg_kmem_online() && + !(shrinker->flags & SHRINKER_NONSLAB)) + continue; + + ret = do_shrink_slab(&sc, shrinker, priority); + if (ret == SHRINK_EMPTY) { + clear_bit(i, info->map); + /* + * After the shrinker reported that it had no objects to + * free, but before we cleared the corresponding bit in + * the memcg shrinker map, a new object might have been + * added. To make sure, we have the bit set in this + * case, we invoke the shrinker one more time and reset + * the bit if it reports that it is not empty anymore. + * The memory barrier here pairs with the barrier in + * set_shrinker_bit(): + * + * list_lru_add() shrink_slab_memcg() + * list_add_tail() clear_bit() + * + * set_bit() do_shrink_slab() + */ + smp_mb__after_atomic(); + ret = do_shrink_slab(&sc, shrinker, priority); + if (ret == SHRINK_EMPTY) + ret = 0; + else + set_shrinker_bit(memcg, nid, i); + } + freed += ret; + + if (rwsem_is_contended(&shrinker_rwsem)) { + freed = freed ? : 1; + break; + } + } +unlock: + up_read(&shrinker_rwsem); + return freed; +} +#else /* !CONFIG_MEMCG */ +static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, + struct mem_cgroup *memcg, int priority) +{ + return 0; +} +#endif /* CONFIG_MEMCG */ + +/** + * shrink_slab - shrink slab caches + * @gfp_mask: allocation context + * @nid: node whose slab caches to target + * @memcg: memory cgroup whose slab caches to target + * @priority: the reclaim priority + * + * Call the shrink functions to age shrinkable caches. + * + * @nid is passed along to shrinkers with SHRINKER_NUMA_AWARE set, + * unaware shrinkers will receive a node id of 0 instead. + * + * @memcg specifies the memory cgroup to target. Unaware shrinkers + * are called only if it is the root cgroup. + * + * @priority is sc->priority, we take the number of objects and >> by priority + * in order to get the scan target. + * + * Returns the number of reclaimed slab objects. + */ +unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, + int priority) +{ + unsigned long ret, freed = 0; + struct shrinker *shrinker; + + /* + * The root memcg might be allocated even though memcg is disabled + * via "cgroup_disable=memory" boot parameter. This could make + * mem_cgroup_is_root() return false, then just run memcg slab + * shrink, but skip global shrink. This may result in premature + * oom. + */ + if (!mem_cgroup_disabled() && !mem_cgroup_is_root(memcg)) + return shrink_slab_memcg(gfp_mask, nid, memcg, priority); + + if (!down_read_trylock(&shrinker_rwsem)) + goto out; + + list_for_each_entry(shrinker, &shrinker_list, list) { + struct shrink_control sc = { + .gfp_mask = gfp_mask, + .nid = nid, + .memcg = memcg, + }; + + ret = do_shrink_slab(&sc, shrinker, priority); + if (ret == SHRINK_EMPTY) + ret = 0; + freed += ret; + /* + * Bail out if someone want to register a new shrinker to + * prevent the registration from being stalled for long periods + * by parallel ongoing shrinking. + */ + if (rwsem_is_contended(&shrinker_rwsem)) { + freed = freed ? : 1; + break; + } + } + + up_read(&shrinker_rwsem); +out: + cond_resched(); + return freed; +} + +/* + * Add a shrinker callback to be called from the vm. + */ +static int __prealloc_shrinker(struct shrinker *shrinker) +{ + unsigned int size; + int err; + + if (shrinker->flags & SHRINKER_MEMCG_AWARE) { + err = prealloc_memcg_shrinker(shrinker); + if (err != -ENOSYS) + return err; + + shrinker->flags &= ~SHRINKER_MEMCG_AWARE; + } + + size = sizeof(*shrinker->nr_deferred); + if (shrinker->flags & SHRINKER_NUMA_AWARE) + size *= nr_node_ids; + + shrinker->nr_deferred = kzalloc(size, GFP_KERNEL); + if (!shrinker->nr_deferred) + return -ENOMEM; + + return 0; +} + +#ifdef CONFIG_SHRINKER_DEBUG +int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) +{ + va_list ap; + int err; + + va_start(ap, fmt); + shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); + va_end(ap); + if (!shrinker->name) + return -ENOMEM; + + err = __prealloc_shrinker(shrinker); + if (err) { + kfree_const(shrinker->name); + shrinker->name = NULL; + } + + return err; +} +#else +int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) +{ + return __prealloc_shrinker(shrinker); +} +#endif + +void free_prealloced_shrinker(struct shrinker *shrinker) +{ +#ifdef CONFIG_SHRINKER_DEBUG + kfree_const(shrinker->name); + shrinker->name = NULL; +#endif + if (shrinker->flags & SHRINKER_MEMCG_AWARE) { + down_write(&shrinker_rwsem); + unregister_memcg_shrinker(shrinker); + up_write(&shrinker_rwsem); + return; + } + + kfree(shrinker->nr_deferred); + shrinker->nr_deferred = NULL; +} + +void register_shrinker_prepared(struct shrinker *shrinker) +{ + down_write(&shrinker_rwsem); + list_add_tail(&shrinker->list, &shrinker_list); + shrinker->flags |= SHRINKER_REGISTERED; + shrinker_debugfs_add(shrinker); + up_write(&shrinker_rwsem); +} + +static int __register_shrinker(struct shrinker *shrinker) +{ + int err = __prealloc_shrinker(shrinker); + + if (err) + return err; + register_shrinker_prepared(shrinker); + return 0; +} + +#ifdef CONFIG_SHRINKER_DEBUG +int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) +{ + va_list ap; + int err; + + va_start(ap, fmt); + shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); + va_end(ap); + if (!shrinker->name) + return -ENOMEM; + + err = __register_shrinker(shrinker); + if (err) { + kfree_const(shrinker->name); + shrinker->name = NULL; + } + return err; +} +#else +int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) +{ + return __register_shrinker(shrinker); +} +#endif +EXPORT_SYMBOL(register_shrinker); + +/* + * Remove one + */ +void unregister_shrinker(struct shrinker *shrinker) +{ + struct dentry *debugfs_entry; + int debugfs_id; + + if (!(shrinker->flags & SHRINKER_REGISTERED)) + return; + + down_write(&shrinker_rwsem); + list_del(&shrinker->list); + shrinker->flags &= ~SHRINKER_REGISTERED; + if (shrinker->flags & SHRINKER_MEMCG_AWARE) + unregister_memcg_shrinker(shrinker); + debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id); + up_write(&shrinker_rwsem); + + shrinker_debugfs_remove(debugfs_entry, debugfs_id); + + kfree(shrinker->nr_deferred); + shrinker->nr_deferred = NULL; +} +EXPORT_SYMBOL(unregister_shrinker); + +/** + * synchronize_shrinkers - Wait for all running shrinkers to complete. + * + * This is equivalent to calling unregister_shrink() and register_shrinker(), + * but atomically and with less overhead. This is useful to guarantee that all + * shrinker invocations have seen an update, before freeing memory, similar to + * rcu. + */ +void synchronize_shrinkers(void) +{ + down_write(&shrinker_rwsem); + up_write(&shrinker_rwsem); +} +EXPORT_SYMBOL(synchronize_shrinkers); diff --git a/mm/vmscan.c b/mm/vmscan.c index 80e9a222e522..0a0f4c2fd519 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -35,7 +35,6 @@ #include #include #include -#include #include #include #include @@ -188,246 +187,7 @@ struct scan_control { */ int vm_swappiness = 60; -LIST_HEAD(shrinker_list); -DECLARE_RWSEM(shrinker_rwsem); - #ifdef CONFIG_MEMCG -static int shrinker_nr_max; - -/* The shrinker_info is expanded in a batch of BITS_PER_LONG */ -static inline int shrinker_map_size(int nr_items) -{ - return (DIV_ROUND_UP(nr_items, BITS_PER_LONG) * sizeof(unsigned long)); -} - -static inline int shrinker_defer_size(int nr_items) -{ - return (round_up(nr_items, BITS_PER_LONG) * sizeof(atomic_long_t)); -} - -static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, - int nid) -{ - return rcu_dereference_protected(memcg->nodeinfo[nid]->shrinker_info, - lockdep_is_held(&shrinker_rwsem)); -} - -static int expand_one_shrinker_info(struct mem_cgroup *memcg, - int map_size, int defer_size, - int old_map_size, int old_defer_size, - int new_nr_max) -{ - struct shrinker_info *new, *old; - struct mem_cgroup_per_node *pn; - int nid; - int size = map_size + defer_size; - - for_each_node(nid) { - pn = memcg->nodeinfo[nid]; - old = shrinker_info_protected(memcg, nid); - /* Not yet online memcg */ - if (!old) - return 0; - - /* Already expanded this shrinker_info */ - if (new_nr_max <= old->map_nr_max) - continue; - - new = kvmalloc_node(sizeof(*new) + size, GFP_KERNEL, nid); - if (!new) - return -ENOMEM; - - new->nr_deferred = (atomic_long_t *)(new + 1); - new->map = (void *)new->nr_deferred + defer_size; - new->map_nr_max = new_nr_max; - - /* map: set all old bits, clear all new bits */ - memset(new->map, (int)0xff, old_map_size); - memset((void *)new->map + old_map_size, 0, map_size - old_map_size); - /* nr_deferred: copy old values, clear all new values */ - memcpy(new->nr_deferred, old->nr_deferred, old_defer_size); - memset((void *)new->nr_deferred + old_defer_size, 0, - defer_size - old_defer_size); - - rcu_assign_pointer(pn->shrinker_info, new); - kvfree_rcu(old, rcu); - } - - return 0; -} - -void free_shrinker_info(struct mem_cgroup *memcg) -{ - struct mem_cgroup_per_node *pn; - struct shrinker_info *info; - int nid; - - for_each_node(nid) { - pn = memcg->nodeinfo[nid]; - info = rcu_dereference_protected(pn->shrinker_info, true); - kvfree(info); - rcu_assign_pointer(pn->shrinker_info, NULL); - } -} - -int alloc_shrinker_info(struct mem_cgroup *memcg) -{ - struct shrinker_info *info; - int nid, size, ret = 0; - int map_size, defer_size = 0; - - down_write(&shrinker_rwsem); - map_size = shrinker_map_size(shrinker_nr_max); - defer_size = shrinker_defer_size(shrinker_nr_max); - size = map_size + defer_size; - for_each_node(nid) { - info = kvzalloc_node(sizeof(*info) + size, GFP_KERNEL, nid); - if (!info) { - free_shrinker_info(memcg); - ret = -ENOMEM; - break; - } - info->nr_deferred = (atomic_long_t *)(info + 1); - info->map = (void *)info->nr_deferred + defer_size; - info->map_nr_max = shrinker_nr_max; - rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, info); - } - up_write(&shrinker_rwsem); - - return ret; -} - -static int expand_shrinker_info(int new_id) -{ - int ret = 0; - int new_nr_max = round_up(new_id + 1, BITS_PER_LONG); - int map_size, defer_size = 0; - int old_map_size, old_defer_size = 0; - struct mem_cgroup *memcg; - - if (!root_mem_cgroup) - goto out; - - lockdep_assert_held(&shrinker_rwsem); - - map_size = shrinker_map_size(new_nr_max); - defer_size = shrinker_defer_size(new_nr_max); - old_map_size = shrinker_map_size(shrinker_nr_max); - old_defer_size = shrinker_defer_size(shrinker_nr_max); - - memcg = mem_cgroup_iter(NULL, NULL, NULL); - do { - ret = expand_one_shrinker_info(memcg, map_size, defer_size, - old_map_size, old_defer_size, - new_nr_max); - if (ret) { - mem_cgroup_iter_break(NULL, memcg); - goto out; - } - } while ((memcg = mem_cgroup_iter(NULL, memcg, NULL)) != NULL); -out: - if (!ret) - shrinker_nr_max = new_nr_max; - - return ret; -} - -void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) -{ - if (shrinker_id >= 0 && memcg && !mem_cgroup_is_root(memcg)) { - struct shrinker_info *info; - - rcu_read_lock(); - info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); - if (!WARN_ON_ONCE(shrinker_id >= info->map_nr_max)) { - /* Pairs with smp mb in shrink_slab() */ - smp_mb__before_atomic(); - set_bit(shrinker_id, info->map); - } - rcu_read_unlock(); - } -} - -static DEFINE_IDR(shrinker_idr); - -static int prealloc_memcg_shrinker(struct shrinker *shrinker) -{ - int id, ret = -ENOMEM; - - if (mem_cgroup_disabled()) - return -ENOSYS; - - down_write(&shrinker_rwsem); - /* This may call shrinker, so it must use down_read_trylock() */ - id = idr_alloc(&shrinker_idr, shrinker, 0, 0, GFP_KERNEL); - if (id < 0) - goto unlock; - - if (id >= shrinker_nr_max) { - if (expand_shrinker_info(id)) { - idr_remove(&shrinker_idr, id); - goto unlock; - } - } - shrinker->id = id; - ret = 0; -unlock: - up_write(&shrinker_rwsem); - return ret; -} - -static void unregister_memcg_shrinker(struct shrinker *shrinker) -{ - int id = shrinker->id; - - BUG_ON(id < 0); - - lockdep_assert_held(&shrinker_rwsem); - - idr_remove(&shrinker_idr, id); -} - -static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, - struct mem_cgroup *memcg) -{ - struct shrinker_info *info; - - info = shrinker_info_protected(memcg, nid); - return atomic_long_xchg(&info->nr_deferred[shrinker->id], 0); -} - -static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, - struct mem_cgroup *memcg) -{ - struct shrinker_info *info; - - info = shrinker_info_protected(memcg, nid); - return atomic_long_add_return(nr, &info->nr_deferred[shrinker->id]); -} - -void reparent_shrinker_deferred(struct mem_cgroup *memcg) -{ - int i, nid; - long nr; - struct mem_cgroup *parent; - struct shrinker_info *child_info, *parent_info; - - parent = parent_mem_cgroup(memcg); - if (!parent) - parent = root_mem_cgroup; - - /* Prevent from concurrent shrinker_info expand */ - down_read(&shrinker_rwsem); - for_each_node(nid) { - child_info = shrinker_info_protected(memcg, nid); - parent_info = shrinker_info_protected(parent, nid); - for (i = 0; i < child_info->map_nr_max; i++) { - nr = atomic_long_read(&child_info->nr_deferred[i]); - atomic_long_add(nr, &parent_info->nr_deferred[i]); - } - } - up_read(&shrinker_rwsem); -} /* Returns true for reclaim through cgroup limits or cgroup interfaces. */ static bool cgroup_reclaim(struct scan_control *sc) @@ -468,27 +228,6 @@ static bool writeback_throttling_sane(struct scan_control *sc) return false; } #else -static int prealloc_memcg_shrinker(struct shrinker *shrinker) -{ - return -ENOSYS; -} - -static void unregister_memcg_shrinker(struct shrinker *shrinker) -{ -} - -static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, - struct mem_cgroup *memcg) -{ - return 0; -} - -static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, - struct mem_cgroup *memcg) -{ - return 0; -} - static bool cgroup_reclaim(struct scan_control *sc) { return false; @@ -557,39 +296,6 @@ static void flush_reclaim_state(struct scan_control *sc) } } -static long xchg_nr_deferred(struct shrinker *shrinker, - struct shrink_control *sc) -{ - int nid = sc->nid; - - if (!(shrinker->flags & SHRINKER_NUMA_AWARE)) - nid = 0; - - if (sc->memcg && - (shrinker->flags & SHRINKER_MEMCG_AWARE)) - return xchg_nr_deferred_memcg(nid, shrinker, - sc->memcg); - - return atomic_long_xchg(&shrinker->nr_deferred[nid], 0); -} - - -static long add_nr_deferred(long nr, struct shrinker *shrinker, - struct shrink_control *sc) -{ - int nid = sc->nid; - - if (!(shrinker->flags & SHRINKER_NUMA_AWARE)) - nid = 0; - - if (sc->memcg && - (shrinker->flags & SHRINKER_MEMCG_AWARE)) - return add_nr_deferred_memcg(nr, nid, shrinker, - sc->memcg); - - return atomic_long_add_return(nr, &shrinker->nr_deferred[nid]); -} - static bool can_demote(int nid, struct scan_control *sc) { if (!numa_demotion_enabled) @@ -671,413 +377,6 @@ static unsigned long lruvec_lru_size(struct lruvec *lruvec, enum lru_list lru, return size; } -/* - * Add a shrinker callback to be called from the vm. - */ -static int __prealloc_shrinker(struct shrinker *shrinker) -{ - unsigned int size; - int err; - - if (shrinker->flags & SHRINKER_MEMCG_AWARE) { - err = prealloc_memcg_shrinker(shrinker); - if (err != -ENOSYS) - return err; - - shrinker->flags &= ~SHRINKER_MEMCG_AWARE; - } - - size = sizeof(*shrinker->nr_deferred); - if (shrinker->flags & SHRINKER_NUMA_AWARE) - size *= nr_node_ids; - - shrinker->nr_deferred = kzalloc(size, GFP_KERNEL); - if (!shrinker->nr_deferred) - return -ENOMEM; - - return 0; -} - -#ifdef CONFIG_SHRINKER_DEBUG -int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - va_list ap; - int err; - - va_start(ap, fmt); - shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); - va_end(ap); - if (!shrinker->name) - return -ENOMEM; - - err = __prealloc_shrinker(shrinker); - if (err) { - kfree_const(shrinker->name); - shrinker->name = NULL; - } - - return err; -} -#else -int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - return __prealloc_shrinker(shrinker); -} -#endif - -void free_prealloced_shrinker(struct shrinker *shrinker) -{ -#ifdef CONFIG_SHRINKER_DEBUG - kfree_const(shrinker->name); - shrinker->name = NULL; -#endif - if (shrinker->flags & SHRINKER_MEMCG_AWARE) { - down_write(&shrinker_rwsem); - unregister_memcg_shrinker(shrinker); - up_write(&shrinker_rwsem); - return; - } - - kfree(shrinker->nr_deferred); - shrinker->nr_deferred = NULL; -} - -void register_shrinker_prepared(struct shrinker *shrinker) -{ - down_write(&shrinker_rwsem); - list_add_tail(&shrinker->list, &shrinker_list); - shrinker->flags |= SHRINKER_REGISTERED; - shrinker_debugfs_add(shrinker); - up_write(&shrinker_rwsem); -} - -static int __register_shrinker(struct shrinker *shrinker) -{ - int err = __prealloc_shrinker(shrinker); - - if (err) - return err; - register_shrinker_prepared(shrinker); - return 0; -} - -#ifdef CONFIG_SHRINKER_DEBUG -int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - va_list ap; - int err; - - va_start(ap, fmt); - shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); - va_end(ap); - if (!shrinker->name) - return -ENOMEM; - - err = __register_shrinker(shrinker); - if (err) { - kfree_const(shrinker->name); - shrinker->name = NULL; - } - return err; -} -#else -int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - return __register_shrinker(shrinker); -} -#endif -EXPORT_SYMBOL(register_shrinker); - -/* - * Remove one - */ -void unregister_shrinker(struct shrinker *shrinker) -{ - struct dentry *debugfs_entry; - int debugfs_id; - - if (!(shrinker->flags & SHRINKER_REGISTERED)) - return; - - down_write(&shrinker_rwsem); - list_del(&shrinker->list); - shrinker->flags &= ~SHRINKER_REGISTERED; - if (shrinker->flags & SHRINKER_MEMCG_AWARE) - unregister_memcg_shrinker(shrinker); - debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id); - up_write(&shrinker_rwsem); - - shrinker_debugfs_remove(debugfs_entry, debugfs_id); - - kfree(shrinker->nr_deferred); - shrinker->nr_deferred = NULL; -} -EXPORT_SYMBOL(unregister_shrinker); - -/** - * synchronize_shrinkers - Wait for all running shrinkers to complete. - * - * This is equivalent to calling unregister_shrink() and register_shrinker(), - * but atomically and with less overhead. This is useful to guarantee that all - * shrinker invocations have seen an update, before freeing memory, similar to - * rcu. - */ -void synchronize_shrinkers(void) -{ - down_write(&shrinker_rwsem); - up_write(&shrinker_rwsem); -} -EXPORT_SYMBOL(synchronize_shrinkers); - -#define SHRINK_BATCH 128 - -static unsigned long do_shrink_slab(struct shrink_control *shrinkctl, - struct shrinker *shrinker, int priority) -{ - unsigned long freed = 0; - unsigned long long delta; - long total_scan; - long freeable; - long nr; - long new_nr; - long batch_size = shrinker->batch ? shrinker->batch - : SHRINK_BATCH; - long scanned = 0, next_deferred; - - freeable = shrinker->count_objects(shrinker, shrinkctl); - if (freeable == 0 || freeable == SHRINK_EMPTY) - return freeable; - - /* - * copy the current shrinker scan count into a local variable - * and zero it so that other concurrent shrinker invocations - * don't also do this scanning work. - */ - nr = xchg_nr_deferred(shrinker, shrinkctl); - - if (shrinker->seeks) { - delta = freeable >> priority; - delta *= 4; - do_div(delta, shrinker->seeks); - } else { - /* - * These objects don't require any IO to create. Trim - * them aggressively under memory pressure to keep - * them from causing refetches in the IO caches. - */ - delta = freeable / 2; - } - - total_scan = nr >> priority; - total_scan += delta; - total_scan = min(total_scan, (2 * freeable)); - - trace_mm_shrink_slab_start(shrinker, shrinkctl, nr, - freeable, delta, total_scan, priority); - - /* - * Normally, we should not scan less than batch_size objects in one - * pass to avoid too frequent shrinker calls, but if the slab has less - * than batch_size objects in total and we are really tight on memory, - * we will try to reclaim all available objects, otherwise we can end - * up failing allocations although there are plenty of reclaimable - * objects spread over several slabs with usage less than the - * batch_size. - * - * We detect the "tight on memory" situations by looking at the total - * number of objects we want to scan (total_scan). If it is greater - * than the total number of objects on slab (freeable), we must be - * scanning at high prio and therefore should try to reclaim as much as - * possible. - */ - while (total_scan >= batch_size || - total_scan >= freeable) { - unsigned long ret; - unsigned long nr_to_scan = min(batch_size, total_scan); - - shrinkctl->nr_to_scan = nr_to_scan; - shrinkctl->nr_scanned = nr_to_scan; - ret = shrinker->scan_objects(shrinker, shrinkctl); - if (ret == SHRINK_STOP) - break; - freed += ret; - - count_vm_events(SLABS_SCANNED, shrinkctl->nr_scanned); - total_scan -= shrinkctl->nr_scanned; - scanned += shrinkctl->nr_scanned; - - cond_resched(); - } - - /* - * The deferred work is increased by any new work (delta) that wasn't - * done, decreased by old deferred work that was done now. - * - * And it is capped to two times of the freeable items. - */ - next_deferred = max_t(long, (nr + delta - scanned), 0); - next_deferred = min(next_deferred, (2 * freeable)); - - /* - * move the unused scan count back into the shrinker in a - * manner that handles concurrent updates. - */ - new_nr = add_nr_deferred(next_deferred, shrinker, shrinkctl); - - trace_mm_shrink_slab_end(shrinker, shrinkctl->nid, freed, nr, new_nr, total_scan); - return freed; -} - -#ifdef CONFIG_MEMCG -static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, - struct mem_cgroup *memcg, int priority) -{ - struct shrinker_info *info; - unsigned long ret, freed = 0; - int i; - - if (!mem_cgroup_online(memcg)) - return 0; - - if (!down_read_trylock(&shrinker_rwsem)) - return 0; - - info = shrinker_info_protected(memcg, nid); - if (unlikely(!info)) - goto unlock; - - for_each_set_bit(i, info->map, info->map_nr_max) { - struct shrink_control sc = { - .gfp_mask = gfp_mask, - .nid = nid, - .memcg = memcg, - }; - struct shrinker *shrinker; - - shrinker = idr_find(&shrinker_idr, i); - if (unlikely(!shrinker || !(shrinker->flags & SHRINKER_REGISTERED))) { - if (!shrinker) - clear_bit(i, info->map); - continue; - } - - /* Call non-slab shrinkers even though kmem is disabled */ - if (!memcg_kmem_online() && - !(shrinker->flags & SHRINKER_NONSLAB)) - continue; - - ret = do_shrink_slab(&sc, shrinker, priority); - if (ret == SHRINK_EMPTY) { - clear_bit(i, info->map); - /* - * After the shrinker reported that it had no objects to - * free, but before we cleared the corresponding bit in - * the memcg shrinker map, a new object might have been - * added. To make sure, we have the bit set in this - * case, we invoke the shrinker one more time and reset - * the bit if it reports that it is not empty anymore. - * The memory barrier here pairs with the barrier in - * set_shrinker_bit(): - * - * list_lru_add() shrink_slab_memcg() - * list_add_tail() clear_bit() - * - * set_bit() do_shrink_slab() - */ - smp_mb__after_atomic(); - ret = do_shrink_slab(&sc, shrinker, priority); - if (ret == SHRINK_EMPTY) - ret = 0; - else - set_shrinker_bit(memcg, nid, i); - } - freed += ret; - - if (rwsem_is_contended(&shrinker_rwsem)) { - freed = freed ? : 1; - break; - } - } -unlock: - up_read(&shrinker_rwsem); - return freed; -} -#else /* CONFIG_MEMCG */ -static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, - struct mem_cgroup *memcg, int priority) -{ - return 0; -} -#endif /* CONFIG_MEMCG */ - -/** - * shrink_slab - shrink slab caches - * @gfp_mask: allocation context - * @nid: node whose slab caches to target - * @memcg: memory cgroup whose slab caches to target - * @priority: the reclaim priority - * - * Call the shrink functions to age shrinkable caches. - * - * @nid is passed along to shrinkers with SHRINKER_NUMA_AWARE set, - * unaware shrinkers will receive a node id of 0 instead. - * - * @memcg specifies the memory cgroup to target. Unaware shrinkers - * are called only if it is the root cgroup. - * - * @priority is sc->priority, we take the number of objects and >> by priority - * in order to get the scan target. - * - * Returns the number of reclaimed slab objects. - */ -static unsigned long shrink_slab(gfp_t gfp_mask, int nid, - struct mem_cgroup *memcg, - int priority) -{ - unsigned long ret, freed = 0; - struct shrinker *shrinker; - - /* - * The root memcg might be allocated even though memcg is disabled - * via "cgroup_disable=memory" boot parameter. This could make - * mem_cgroup_is_root() return false, then just run memcg slab - * shrink, but skip global shrink. This may result in premature - * oom. - */ - if (!mem_cgroup_disabled() && !mem_cgroup_is_root(memcg)) - return shrink_slab_memcg(gfp_mask, nid, memcg, priority); - - if (!down_read_trylock(&shrinker_rwsem)) - goto out; - - list_for_each_entry(shrinker, &shrinker_list, list) { - struct shrink_control sc = { - .gfp_mask = gfp_mask, - .nid = nid, - .memcg = memcg, - }; - - ret = do_shrink_slab(&sc, shrinker, priority); - if (ret == SHRINK_EMPTY) - ret = 0; - freed += ret; - /* - * Bail out if someone want to register a new shrinker to - * prevent the registration from being stalled for long periods - * by parallel ongoing shrinking. - */ - if (rwsem_is_contended(&shrinker_rwsem)) { - freed = freed ? : 1; - break; - } - } - - up_read(&shrinker_rwsem); -out: - cond_resched(); - return freed; -} - static unsigned long drop_slab_node(int nid) { unsigned long freed = 0; From patchwork Mon Aug 7 11:08:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712903 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3AB11C04A94 for ; Mon, 7 Aug 2023 11:11:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231927AbjHGLLl (ORCPT ); Mon, 7 Aug 2023 07:11:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231926AbjHGLL1 (ORCPT ); Mon, 7 Aug 2023 07:11:27 -0400 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 012751BF0 for ; Mon, 7 Aug 2023 04:10:36 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id 98e67ed59e1d1-265c94064b8so592320a91.0 for ; Mon, 07 Aug 2023 04:10:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406635; x=1692011435; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=v13l7IPlOPgFsnMxGKXfyNRR5BVZeBzBNEaAsOIHoYU=; b=kCYTaRcfjrYSEt8G3Tw1f1acTO5J6yxn7oF0SsGLa85MduwVEgH5omvSEO969tp3LA wpvSUu2A7//qJL2ilMqNB9PtHKQAFVNRC9oXX6TEGsUMhNv4mOxpl2C1YAZnVZpulCYe yLDYKwIJ4bAvkX2QuqtJJDYUJRh6vr19t7PfH+lhQ++ji8JDwdveN3FzqnpipfKLqAIG dvafeOsYb5J4XciY9gtlA1gSl238AIRfFhWaOJMr5WdeT5BLHH+Cl6s3+MJ/6Htxm+Cq sbYQtf3+i0mELZ2fQ4kGZP1NFS47ge8l8Znqj7GoIxgmAjgbPULzYpOui4TUq64XmvYi qgMw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406635; x=1692011435; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=v13l7IPlOPgFsnMxGKXfyNRR5BVZeBzBNEaAsOIHoYU=; b=grRX+psWgHOHR/WsS/gUSjoTl5JYbNHp4zsl7JtzPzkOacAqEiIsKiA5ys/pAHo5PE T9Y49NRTqoDljr8hfGLnkbynjQYziy4YqfID1J+27LU82MMy1MD/fjGi3EYwPlA+uEoF VxIOOflTebSml631VZSTJAM/LCw38Ochk8tCr4Jk1SafCWOlF2tA1Du3IGlTN43TwqnA r+XmVOkN8QR6rEXQsfRirRZY8CCSURv/0o0JJ2cL9NKiKTb13Os3JSsASKo1O+9fJ0As QvhbqqbKNnD4Q+aMit6F+KQLOwBfQiSFLqk7U+O2o6ZTeVrM3ZdRyMRDtxfUvy3bUJm6 JIKQ== X-Gm-Message-State: AOJu0YxM8jjK/e1BY3PJWQWfc+OTs32ZUPtJFrazj2At3nJMxP7lDuHa sara5J897wnZqJfferWg7NeWtA== X-Google-Smtp-Source: AGHT+IFtRmyHpiiF2qszY30g7vYVkD2mnACy5d4vfrtyjmwLjyswWFf77Xamslud93nGDOipc3oAlA== X-Received: by 2002:a17:90a:69c4:b0:269:34a6:d4ca with SMTP id s62-20020a17090a69c400b0026934a6d4camr6363728pjj.0.1691406635181; Mon, 07 Aug 2023 04:10:35 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.10.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:10:34 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 03/48] mm: shrinker: remove redundant shrinker_rwsem in debugfs operations Date: Mon, 7 Aug 2023 19:08:51 +0800 Message-Id: <20230807110936.21819-4-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The debugfs_remove_recursive() will wait for debugfs_file_put() to return, so the shrinker will not be freed when doing debugfs operations (such as shrinker_debugfs_count_show() and shrinker_debugfs_scan_write()), so there is no need to hold shrinker_rwsem during debugfs operations. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- mm/shrinker_debug.c | 16 +--------------- 1 file changed, 1 insertion(+), 15 deletions(-) diff --git a/mm/shrinker_debug.c b/mm/shrinker_debug.c index 3ab53fad8876..61702bdc1af4 100644 --- a/mm/shrinker_debug.c +++ b/mm/shrinker_debug.c @@ -49,17 +49,12 @@ static int shrinker_debugfs_count_show(struct seq_file *m, void *v) struct mem_cgroup *memcg; unsigned long total; bool memcg_aware; - int ret, nid; + int ret = 0, nid; count_per_node = kcalloc(nr_node_ids, sizeof(unsigned long), GFP_KERNEL); if (!count_per_node) return -ENOMEM; - ret = down_read_killable(&shrinker_rwsem); - if (ret) { - kfree(count_per_node); - return ret; - } rcu_read_lock(); memcg_aware = shrinker->flags & SHRINKER_MEMCG_AWARE; @@ -92,7 +87,6 @@ static int shrinker_debugfs_count_show(struct seq_file *m, void *v) } while ((memcg = mem_cgroup_iter(NULL, memcg, NULL)) != NULL); rcu_read_unlock(); - up_read(&shrinker_rwsem); kfree(count_per_node); return ret; @@ -117,7 +111,6 @@ static ssize_t shrinker_debugfs_scan_write(struct file *file, struct mem_cgroup *memcg = NULL; int nid; char kbuf[72]; - ssize_t ret; read_len = size < (sizeof(kbuf) - 1) ? size : (sizeof(kbuf) - 1); if (copy_from_user(kbuf, buf, read_len)) @@ -146,12 +139,6 @@ static ssize_t shrinker_debugfs_scan_write(struct file *file, return -EINVAL; } - ret = down_read_killable(&shrinker_rwsem); - if (ret) { - mem_cgroup_put(memcg); - return ret; - } - sc.nid = nid; sc.memcg = memcg; sc.nr_to_scan = nr_to_scan; @@ -159,7 +146,6 @@ static ssize_t shrinker_debugfs_scan_write(struct file *file, shrinker->scan_objects(shrinker, &sc); - up_read(&shrinker_rwsem); mem_cgroup_put(memcg); return size; From patchwork Mon Aug 7 11:08:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711239 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6178DC04FDF for ; Mon, 7 Aug 2023 11:11:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229561AbjHGLLm (ORCPT ); Mon, 7 Aug 2023 07:11:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48450 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231928AbjHGLL1 (ORCPT ); Mon, 7 Aug 2023 07:11:27 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C1A34106 for ; Mon, 7 Aug 2023 04:10:50 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id d9443c01a7336-1bb91c20602so9340895ad.0 for ; Mon, 07 Aug 2023 04:10:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406647; x=1692011447; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=0+ir4b8RJjPS6OIbAMeQuS4120VPLjqRz3YtsLadct8=; b=XqSgm7kBpeCnE2gk/ybefyIcAxePmTjaifDT0pHnXDcb/Nc/UeCuy/rdgy4xRowAkQ aP4dUp/hrUWHR/4zWDCrbxFRixmFOlV8pnAOQyS1AwDBmMy6PTOmr3iG0yKzCbxujje0 t73ctUmXR29afAKI5JNarlJvM1vvoPYY3cx3UcuU87ePLchKbMsLak0/Jvs9wqFUCDZe F5bgU4otH0OCdVxWD0sXM2a1eraAUukOoDwvlCcB8mzgk3iB2I7g5XjW4+48PuHaFgCc uOLaUcpy4QuZWt68WuxcqsF9z/vzQ2XOsuEa2jtvaGJ4t8kUtmd0Q7Uf/YTK0wRowRTP E2tA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406647; x=1692011447; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=0+ir4b8RJjPS6OIbAMeQuS4120VPLjqRz3YtsLadct8=; b=mEqDE5qOraCFObRUtaf8f0ON8EUwtNgKlkOmkcVBTjBnPUAdChIOQvDtdVEeWrZfwl WStDQ2tDUwIjPOaWhbMThF0AuWiWYWvq1L4zcva1+ZVv4FtYjQl298k8SuB4QUK8e6+H 9PhXfWk0X54Z4WiPWFlwWHSmVCUKomZCmW2WFxYBYb+TB2646y9tG5gu3CqMbUk7tAxp woC1+icY6WtOjeHhWvELNTUIhGUf69E7fxR3lzdm75t7QudWzmwhgyyp2/0S2BUqXbso 6nWahUTLQp7mvH3zybBjAUr93ethw2IzDnZt9AK4WgFTrBHmdzo126Cv9FK6HjUKJZjg BV5w== X-Gm-Message-State: ABy/qLa3MCx4Z3+gNyrAhOnJwOrwTfoo9K3HSzEZ7CGCp7c+35caLxEF j0rpWen8HVerxDCLKvYOOSpLWQ== X-Google-Smtp-Source: APBJJlHuLqAtKowl4cccNcqjA9V94U7s0kNn49/V0/tk7bu/NPlYiQpbpDIicm2vAutfhjwO22jVoA== X-Received: by 2002:a17:902:f54d:b0:1b8:9fc4:2733 with SMTP id h13-20020a170902f54d00b001b89fc42733mr32837074plf.3.1691406647588; Mon, 07 Aug 2023 04:10:47 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.10.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:10:47 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 04/48] mm: shrinker: add infrastructure for dynamically allocating shrinker Date: Mon, 7 Aug 2023 19:08:52 +0800 Message-Id: <20230807110936.21819-5-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Currently, the shrinker instances can be divided into the following three types: a) global shrinker instance statically defined in the kernel, such as workingset_shadow_shrinker. b) global shrinker instance statically defined in the kernel modules, such as mmu_shrinker in x86. c) shrinker instance embedded in other structures. For case a, the memory of shrinker instance is never freed. For case b, the memory of shrinker instance will be freed after synchronize_rcu() when the module is unloaded. For case c, the memory of shrinker instance will be freed along with the structure it is embedded in. In preparation for implementing lockless slab shrink, we need to dynamically allocate those shrinker instances in case c, then the memory can be dynamically freed alone by calling kfree_rcu(). So this commit adds the following new APIs for dynamically allocating shrinker, and add a private_data field to struct shrinker to record and get the original embedded structure. 1. shrinker_alloc() Used to allocate shrinker instance itself and related memory, it will return a pointer to the shrinker instance on success and NULL on failure. 2. shrinker_register() Used to register the shrinker instance, which is same as the current register_shrinker_prepared(). 3. shrinker_free() Used to unregister (if needed) and free the shrinker instance. In order to simplify shrinker-related APIs and make shrinker more independent of other kernel mechanisms, subsequent submissions will use the above API to convert all shrinkers (including case a and b) to dynamically allocated, and then remove all existing APIs. This will also have another advantage mentioned by Dave Chinner: ``` The other advantage of this is that it will break all the existing out of tree code and third party modules using the old API and will no longer work with a kernel using lockless slab shrinkers. They need to break (both at the source and binary levels) to stop bad things from happening due to using unconverted shrinkers in the new setup. ``` Signed-off-by: Qi Zheng --- include/linux/shrinker.h | 7 +++ mm/internal.h | 11 +++++ mm/shrinker.c | 101 +++++++++++++++++++++++++++++++++++++++ mm/shrinker_debug.c | 17 ++++++- 4 files changed, 134 insertions(+), 2 deletions(-) diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index 8dc15aa37410..cc23ff0aee20 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -70,6 +70,8 @@ struct shrinker { int seeks; /* seeks to recreate an obj */ unsigned flags; + void *private_data; + /* These are for internal use */ struct list_head list; #ifdef CONFIG_MEMCG @@ -95,6 +97,11 @@ struct shrinker { * non-MEMCG_AWARE shrinker should not have this flag set. */ #define SHRINKER_NONSLAB (1 << 3) +#define SHRINKER_ALLOCATED (1 << 4) + +struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...); +void shrinker_register(struct shrinker *shrinker); +void shrinker_free(struct shrinker *shrinker); extern int __printf(2, 3) prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...); diff --git a/mm/internal.h b/mm/internal.h index b98c29f0a471..7b882b903b82 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1152,6 +1152,9 @@ unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, #ifdef CONFIG_SHRINKER_DEBUG extern int shrinker_debugfs_add(struct shrinker *shrinker); +extern int shrinker_debugfs_name_alloc(struct shrinker *shrinker, + const char *fmt, va_list ap); +extern void shrinker_debugfs_name_free(struct shrinker *shrinker); extern struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, int *debugfs_id); extern void shrinker_debugfs_remove(struct dentry *debugfs_entry, @@ -1161,6 +1164,14 @@ static inline int shrinker_debugfs_add(struct shrinker *shrinker) { return 0; } +static inline int shrinker_debugfs_name_alloc(struct shrinker *shrinker, + const char *fmt, va_list ap) +{ + return 0; +} +static inline void shrinker_debugfs_name_free(struct shrinker *shrinker) +{ +} static inline struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, int *debugfs_id) { diff --git a/mm/shrinker.c b/mm/shrinker.c index 043c87ccfab4..43a375f954f3 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -550,6 +550,107 @@ unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, return freed; } +struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...) +{ + struct shrinker *shrinker; + unsigned int size; + va_list ap; + int err; + + shrinker = kzalloc(sizeof(struct shrinker), GFP_KERNEL); + if (!shrinker) + return NULL; + + va_start(ap, fmt); + err = shrinker_debugfs_name_alloc(shrinker, fmt, ap); + va_end(ap); + if (err) + goto err_name; + + shrinker->flags = flags | SHRINKER_ALLOCATED; + + if (flags & SHRINKER_MEMCG_AWARE) { + err = prealloc_memcg_shrinker(shrinker); + if (err == -ENOSYS) + shrinker->flags &= ~SHRINKER_MEMCG_AWARE; + else if (err == 0) + goto done; + else + goto err_flags; + } + + /* + * The nr_deferred is available on per memcg level for memcg aware + * shrinkers, so only allocate nr_deferred in the following cases: + * - non memcg aware shrinkers + * - !CONFIG_MEMCG + * - memcg is disabled by kernel command line + */ + size = sizeof(*shrinker->nr_deferred); + if (flags & SHRINKER_NUMA_AWARE) + size *= nr_node_ids; + + shrinker->nr_deferred = kzalloc(size, GFP_KERNEL); + if (!shrinker->nr_deferred) + goto err_flags; + +done: + return shrinker; + +err_flags: + shrinker_debugfs_name_free(shrinker); +err_name: + kfree(shrinker); + return NULL; +} +EXPORT_SYMBOL_GPL(shrinker_alloc); + +void shrinker_register(struct shrinker *shrinker) +{ + if (unlikely(!(shrinker->flags & SHRINKER_ALLOCATED))) { + pr_warn("Must use shrinker_alloc() to dynamically allocate the shrinker"); + return; + } + + down_write(&shrinker_rwsem); + list_add_tail(&shrinker->list, &shrinker_list); + shrinker->flags |= SHRINKER_REGISTERED; + shrinker_debugfs_add(shrinker); + up_write(&shrinker_rwsem); +} +EXPORT_SYMBOL_GPL(shrinker_register); + +void shrinker_free(struct shrinker *shrinker) +{ + struct dentry *debugfs_entry = NULL; + int debugfs_id; + + if (!shrinker) + return; + + down_write(&shrinker_rwsem); + if (shrinker->flags & SHRINKER_REGISTERED) { + list_del(&shrinker->list); + debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id); + shrinker->flags &= ~SHRINKER_REGISTERED; + } else { + shrinker_debugfs_name_free(shrinker); + } + + if (shrinker->flags & SHRINKER_MEMCG_AWARE) + unregister_memcg_shrinker(shrinker); + up_write(&shrinker_rwsem); + + if (debugfs_entry) + shrinker_debugfs_remove(debugfs_entry, debugfs_id); + + kfree(shrinker->nr_deferred); + shrinker->nr_deferred = NULL; + + kfree(shrinker); +} +EXPORT_SYMBOL_GPL(shrinker_free); + /* * Add a shrinker callback to be called from the vm. */ diff --git a/mm/shrinker_debug.c b/mm/shrinker_debug.c index 61702bdc1af4..aa2027075ed9 100644 --- a/mm/shrinker_debug.c +++ b/mm/shrinker_debug.c @@ -191,6 +191,20 @@ int shrinker_debugfs_add(struct shrinker *shrinker) return 0; } +int shrinker_debugfs_name_alloc(struct shrinker *shrinker, const char *fmt, + va_list ap) +{ + shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); + + return shrinker->name ? 0 : -ENOMEM; +} + +void shrinker_debugfs_name_free(struct shrinker *shrinker) +{ + kfree_const(shrinker->name); + shrinker->name = NULL; +} + int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...) { struct dentry *entry; @@ -239,8 +253,7 @@ struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, lockdep_assert_held(&shrinker_rwsem); - kfree_const(shrinker->name); - shrinker->name = NULL; + shrinker_debugfs_name_free(shrinker); *debugfs_id = entry ? shrinker->debugfs_id : -1; shrinker->debugfs_entry = NULL; From patchwork Mon Aug 7 11:08:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712902 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 08994C04FE0 for ; Mon, 7 Aug 2023 11:12:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231352AbjHGLMV (ORCPT ); Mon, 7 Aug 2023 07:12:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231979AbjHGLME (ORCPT ); Mon, 7 Aug 2023 07:12:04 -0400 Received: from mail-pj1-x1034.google.com (mail-pj1-x1034.google.com [IPv6:2607:f8b0:4864:20::1034]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C7EA1986 for ; Mon, 7 Aug 2023 04:11:13 -0700 (PDT) Received: by mail-pj1-x1034.google.com with SMTP id 98e67ed59e1d1-265c94064b8so592410a91.0 for ; Mon, 07 Aug 2023 04:11:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406660; x=1692011460; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=gw0136sZs5r00/aJ54ocs9PBikYP7lRbXpwQPAfPTOc=; b=Gyvrq2nfyAR2gtiKV5zvL8Xhj+SCDDvYcDtn1XMvCOK2WxV+VSYbUnzAoQjYyvGt5+ PHTlpGahxelrDvlDYfQpwR6LaV4hFOqIXHRHdsrciNy+7qVINos9dShQ72ovzklZpuaN tBKHGkUe3hFlhdPUgFyU1ktgofOKrrDExvQw3WHpY26rCW0nNqj3a0s5WCQXQ9Bd9I93 TEwgyMogZ1mPzKBfTbunK1McubgsswcAT76vheTTNvE/WuA1UFNnV1+1CWE/ou902ykn 9hSF0PrzcrYBFpqGd0qLFTJvVM4g/FWHVeqzvA2yGx34iIfgBZSGKt0JN+J335S8BL/2 72/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406660; x=1692011460; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=gw0136sZs5r00/aJ54ocs9PBikYP7lRbXpwQPAfPTOc=; b=ElIpHFKBHeUF11Qnv160Drc8OstaGaGs0TjHypaDJoBLcMD+BJEPIYcIU6eHQJaiPe bzLHqy0V2xLuTUAYFm0ytt7qcTHxsEgmJe6X9ETg0Iz5eMi4PRNeCc8E2/FtzLggv3xf 6AT5IBScr72ennglxBTUrpSi+0MTxpuehzxez+oOLpA62pHCMMgvJkQ/gLpHYyL48M/a 2dGHK2uKAAH6XfJTEIf74PYRqYU1xoFZFTota9hrHZ6wD0mx7LkuW9ttd2SjP1OStzjf y8svu3Sc5OLcVWV7rgy33nFAvxuGuHcQmcN0w+Kbk5bWim60Za9X+HnaOOnn0wyZCKqx IU4w== X-Gm-Message-State: ABy/qLYgibuGyrJyvFCzHpHi4LEX7X8vRgjhZ9v+a8cZxuDD/zI34YYV Gxqv0cv75cJF0yO2OVihQ5pI1Q== X-Google-Smtp-Source: APBJJlEPLwCkyM2NxjgH9xwMvzhNNiNlagu6lRBAbkDAEcDSA5oH2sSREkdo5fvCbnVAS1DDWMCKvg== X-Received: by 2002:a17:90a:4104:b0:25c:1ad3:a4a1 with SMTP id u4-20020a17090a410400b0025c1ad3a4a1mr24588690pjf.1.1691406660379; Mon, 07 Aug 2023 04:11:00 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.10.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:10:59 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 05/48] kvm: mmu: dynamically allocate the x86-mmu shrinker Date: Mon, 7 Aug 2023 19:08:53 +0800 Message-Id: <20230807110936.21819-6-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the x86-mmu shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- arch/x86/kvm/mmu/mmu.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 9e4cd8b4a202..0386d5ec97b0 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -6804,11 +6804,7 @@ static unsigned long mmu_shrink_count(struct shrinker *shrink, return percpu_counter_read_positive(&kvm_total_used_mmu_pages); } -static struct shrinker mmu_shrinker = { - .count_objects = mmu_shrink_count, - .scan_objects = mmu_shrink_scan, - .seeks = DEFAULT_SEEKS * 10, -}; +static struct shrinker *mmu_shrinker; static void mmu_destroy_caches(void) { @@ -6941,10 +6937,16 @@ int kvm_mmu_vendor_module_init(void) if (percpu_counter_init(&kvm_total_used_mmu_pages, 0, GFP_KERNEL)) goto out; - ret = register_shrinker(&mmu_shrinker, "x86-mmu"); - if (ret) + mmu_shrinker = shrinker_alloc(0, "x86-mmu"); + if (!mmu_shrinker) goto out_shrinker; + mmu_shrinker->count_objects = mmu_shrink_count; + mmu_shrinker->scan_objects = mmu_shrink_scan; + mmu_shrinker->seeks = DEFAULT_SEEKS * 10; + + shrinker_register(mmu_shrinker); + return 0; out_shrinker: @@ -6966,7 +6968,7 @@ void kvm_mmu_vendor_module_exit(void) { mmu_destroy_caches(); percpu_counter_destroy(&kvm_total_used_mmu_pages); - unregister_shrinker(&mmu_shrinker); + shrinker_free(mmu_shrinker); } /* From patchwork Mon Aug 7 11:08:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712901 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F8DAC04A94 for ; Mon, 7 Aug 2023 11:13:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231565AbjHGLNH (ORCPT ); Mon, 7 Aug 2023 07:13:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232052AbjHGLMV (ORCPT ); Mon, 7 Aug 2023 07:12:21 -0400 Received: from mail-pg1-x52f.google.com (mail-pg1-x52f.google.com [IPv6:2607:f8b0:4864:20::52f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 01B4B1FCB for ; Mon, 7 Aug 2023 04:11:34 -0700 (PDT) Received: by mail-pg1-x52f.google.com with SMTP id 41be03b00d2f7-55b5a37acb6so361737a12.0 for ; Mon, 07 Aug 2023 04:11:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406673; x=1692011473; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=YQ2nJ797AaeiRC4tEbuFSwr/qroaEGD64TBkJX9gwcc=; b=ln47b2De8WoaconN/yovNFIYkpyrSlbHjJ7O30AuN0v3fhaptV8Rv8p/uTgMw5ewUp ZG1baXWX3w4cWqVDXIBOemS0oLj2+PNkaGXC2OZVpKMXphkVdxVMTs/lnTAL5HQl/5sY XaAH/gxR2iJTsD9i1SGvIVeauJ8ohBUlyO6fZCAIfCsaCSqlNBgSWC3X4OcCTxOF8D8P aJ3rhIbrBRQ4RScgXu8Juii6sq5YNvbJw6x09Ixyfaq7t74WXRGryvfs7JEz6b0jZFwc ahGUwsb8fn5Z7b9T7/r6r1MmeGyYyDblu8RFgBNHHb0eaf9aJCBTyNjHYvmNxb3vGqrU A9hQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406673; x=1692011473; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=YQ2nJ797AaeiRC4tEbuFSwr/qroaEGD64TBkJX9gwcc=; b=KNLb+1RUp4u/OzEv6bRBJGm74WxwikpSmgsO6I4vgZM390EwJh96my4JLYl9znHEr3 65t2914SGtd3QjMcYrM9ypZ5dmxQBo5EAU+Xu1sBAAwAFS1V78G7LK01aYvDjp5yvEFJ /pmbRQqemDpBRQG5GRS7bRJzC2KJkhNuvRWVksKakBaO8EzqBn6AQDOJwuo7D8gsV/5d 2aIUj2jqJ0nAoJDlS7loSKbVGBYJdwK6rw+STKR5TR1YNUboHZtjK+HSi5NggpKJ4y0d oYqskKXi/QhcF05es4zvjXka7FpJgzl8d2uBzEl0L6QHTNknH4Zq8nRiut0bzIG53peM dTJg== X-Gm-Message-State: ABy/qLbLzO9SXnGZQPJPwMqW5zOE7D6fazH/dRB2HGInDsm2CTq0O+tk BxbLlHnRCF7sjSwDHbTFhJvFOA== X-Google-Smtp-Source: APBJJlHrBtuiCQCJiVcJQ0g2xFi5uTTiYi1uZvqZ47NJp4VxlVmrIr4dlBS1TaGO2GoKAlBNE4DJvw== X-Received: by 2002:a17:90a:53a3:b0:268:437:7bd9 with SMTP id y32-20020a17090a53a300b0026804377bd9mr23468663pjh.3.1691406672888; Mon, 07 Aug 2023 04:11:12 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.11.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:11:12 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 06/48] binder: dynamically allocate the android-binder shrinker Date: Mon, 7 Aug 2023 19:08:54 +0800 Message-Id: <20230807110936.21819-7-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the android-binder shrinker. Signed-off-by: Qi Zheng --- drivers/android/binder_alloc.c | 31 +++++++++++++++++++------------ 1 file changed, 19 insertions(+), 12 deletions(-) diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c index e3db8297095a..62675cedd38e 100644 --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -1053,11 +1053,7 @@ binder_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) NULL, sc->nr_to_scan); } -static struct shrinker binder_shrinker = { - .count_objects = binder_shrink_count, - .scan_objects = binder_shrink_scan, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *binder_shrinker; /** * binder_alloc_init() - called by binder_open() for per-proc initialization @@ -1077,19 +1073,30 @@ void binder_alloc_init(struct binder_alloc *alloc) int binder_alloc_shrinker_init(void) { - int ret = list_lru_init(&binder_alloc_lru); + int ret; - if (ret == 0) { - ret = register_shrinker(&binder_shrinker, "android-binder"); - if (ret) - list_lru_destroy(&binder_alloc_lru); + ret = list_lru_init(&binder_alloc_lru); + if (ret) + return ret; + + binder_shrinker = shrinker_alloc(0, "android-binder"); + if (!binder_shrinker) { + list_lru_destroy(&binder_alloc_lru); + return -ENOMEM; } - return ret; + + binder_shrinker->count_objects = binder_shrink_count; + binder_shrinker->scan_objects = binder_shrink_scan; + binder_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(binder_shrinker); + + return 0; } void binder_alloc_shrinker_exit(void) { - unregister_shrinker(&binder_shrinker); + shrinker_free(binder_shrinker); list_lru_destroy(&binder_alloc_lru); } From patchwork Mon Aug 7 11:08:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711238 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E191C04A6A for ; Mon, 7 Aug 2023 11:12:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231997AbjHGLMc (ORCPT ); Mon, 7 Aug 2023 07:12:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49336 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231160AbjHGLMH (ORCPT ); Mon, 7 Aug 2023 07:12:07 -0400 Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 843F01730 for ; Mon, 7 Aug 2023 04:11:42 -0700 (PDT) Received: by mail-pj1-x1033.google.com with SMTP id 98e67ed59e1d1-2680edb9767so930114a91.0 for ; Mon, 07 Aug 2023 04:11:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406686; x=1692011486; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ppdDbzxLfV7T8uyJ0+LWzuRMVQS50F9BO9dGotbDPbU=; b=MlLUTFwBYj7txqomyX5RsQbZ0tuOTesyUPZa0imDy/CbzwI18VWLrI273BHEpiy/59 rQ1jtyDjjrm0A2fn5g0PDon6y1ODu6aNGJCylYpk7eBz5aCl8EYDqiryatgBLfE6j6wl z5DQPgedGrLwi+nxG0CDlruIcPgTiyaIMd4jUriznEP5tOm9lhp6XNenm09AU0AYyYPz hP8xB6m5xmZ4JEVQ0Bc2ouPU+2lWMJulVYbharTYlD2LjNPOhOgz1BVr9kOg3WfUC2R8 kqamQX4BkmNd+ktmJD6D1JNyz78v+ezzbXueyJ3khYdsrERbOdoO7diXy9Rr3O+Hss94 NCVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406686; x=1692011486; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ppdDbzxLfV7T8uyJ0+LWzuRMVQS50F9BO9dGotbDPbU=; b=bXCO0DgVhbHUQyXLEMc4z1t2irO8VrNf1m9Seaesnb+TRFyZ7rbYF2nrCV8dGuFgxI F/KbX7H8xThRV2YIeBk6r1/D1y5Rqj1riciFRIXLO1VU0l1wunjaty6U81mx+ByDgzU4 UMvJR8rUNbvM9cuVYD3sq7QChj3nZdAuPrPQ4eMf9ogmQBnDZTGie68AZ/ELIcJEoOpr YevCegJfLJZVvSMn9Nr8v/RIiZewPTer8BTS7xvT5/1G2Qd3Jf1aldepUP8YHPRaRsQ0 IGXh1bn9TXjQ8+MmCYXiTuUZJZfpWerVilAq9cSHfW1cmkeZIDtp3FysXa2n59eUv5Rk ESMA== X-Gm-Message-State: AOJu0YyVe6vermOm7DszGtDBPCELrrxIOwZunaO6NXlojqKZlO8dfT5d +VJ29vga3Vud+2JEViu57Ct5eg== X-Google-Smtp-Source: AGHT+IF4N48rqO+yuBXOFXn//EzxG9zSjzgF29ivUv9kLYfrFhE3z4laIyd5mkV4h78zNK2JaBG8Rw== X-Received: by 2002:a17:90a:9c3:b0:269:41cf:7212 with SMTP id 61-20020a17090a09c300b0026941cf7212mr4956295pjo.4.1691406685878; Mon, 07 Aug 2023 04:11:25 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.11.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:11:25 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 07/48] drm/ttm: dynamically allocate the drm-ttm_pool shrinker Date: Mon, 7 Aug 2023 19:08:55 +0800 Message-Id: <20230807110936.21819-8-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the drm-ttm_pool shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/gpu/drm/ttm/ttm_pool.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c index cddb9151d20f..c9c9618c0dce 100644 --- a/drivers/gpu/drm/ttm/ttm_pool.c +++ b/drivers/gpu/drm/ttm/ttm_pool.c @@ -73,7 +73,7 @@ static struct ttm_pool_type global_dma32_uncached[MAX_ORDER + 1]; static spinlock_t shrinker_lock; static struct list_head shrinker_list; -static struct shrinker mm_shrinker; +static struct shrinker *mm_shrinker; /* Allocate pages of size 1 << order with the given gfp_flags */ static struct page *ttm_pool_alloc_page(struct ttm_pool *pool, gfp_t gfp_flags, @@ -734,8 +734,8 @@ static int ttm_pool_debugfs_shrink_show(struct seq_file *m, void *data) struct shrink_control sc = { .gfp_mask = GFP_NOFS }; fs_reclaim_acquire(GFP_KERNEL); - seq_printf(m, "%lu/%lu\n", ttm_pool_shrinker_count(&mm_shrinker, &sc), - ttm_pool_shrinker_scan(&mm_shrinker, &sc)); + seq_printf(m, "%lu/%lu\n", ttm_pool_shrinker_count(mm_shrinker, &sc), + ttm_pool_shrinker_scan(mm_shrinker, &sc)); fs_reclaim_release(GFP_KERNEL); return 0; @@ -779,10 +779,17 @@ int ttm_pool_mgr_init(unsigned long num_pages) &ttm_pool_debugfs_shrink_fops); #endif - mm_shrinker.count_objects = ttm_pool_shrinker_count; - mm_shrinker.scan_objects = ttm_pool_shrinker_scan; - mm_shrinker.seeks = 1; - return register_shrinker(&mm_shrinker, "drm-ttm_pool"); + mm_shrinker = shrinker_alloc(0, "drm-ttm_pool"); + if (!mm_shrinker) + return -ENOMEM; + + mm_shrinker->count_objects = ttm_pool_shrinker_count; + mm_shrinker->scan_objects = ttm_pool_shrinker_scan; + mm_shrinker->seeks = 1; + + shrinker_register(mm_shrinker); + + return 0; } /** @@ -802,6 +809,6 @@ void ttm_pool_mgr_fini(void) ttm_pool_type_fini(&global_dma32_uncached[i]); } - unregister_shrinker(&mm_shrinker); + shrinker_free(mm_shrinker); WARN_ON(!list_empty(&shrinker_list)); } From patchwork Mon Aug 7 11:08:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711237 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D7EEC04FE2 for ; Mon, 7 Aug 2023 11:13:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231949AbjHGLNS (ORCPT ); Mon, 7 Aug 2023 07:13:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47762 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232117AbjHGLNA (ORCPT ); Mon, 7 Aug 2023 07:13:00 -0400 Received: from mail-pg1-x536.google.com (mail-pg1-x536.google.com [IPv6:2607:f8b0:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6542C19BD for ; Mon, 7 Aug 2023 04:12:05 -0700 (PDT) Received: by mail-pg1-x536.google.com with SMTP id 41be03b00d2f7-56462258cdeso525472a12.1 for ; Mon, 07 Aug 2023 04:12:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406698; x=1692011498; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=bO4yc6b0222dRNj48HoFyPuU9QjRVolFKKVhhMGpLKw=; b=V+0c3qPhJ3OvHdRK0zt0jjicV8eIk4mcEJBfZa3lpQkwu54lWNVPIEieS4PtRydxoC SOQosWaNmtA5ijvBvBTHzjmbD0d0j9BAeGMmaW/jH6uvD6Ej2n/njXM3uIqGlzrBkh1f 4pNHqPhVUKAnLp7tAzH1vcGObvmfuMOiL8NrO6wDjhRhzYUa1svLTbbXU3r4juxNC7M+ zvZ3SM7T/9w0Je9dQGJ4Z6qlkuAYn1bir+6JxlC1Qr6arztdDyFiMoqBolNxM3VBbd9i jsX4xXrnwmvTP/fkwCWNcOiK6G4rP96fjoeNSyiOnE04LmSKfInS+5dfsRm42DUoM8bY LffQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406698; x=1692011498; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=bO4yc6b0222dRNj48HoFyPuU9QjRVolFKKVhhMGpLKw=; b=RksC3783Yq5MUbp2z5gOVopRaaqsACVGM72jInbhYF3WxsF3k3dQ/Rt25+Z2/mE0gj bEUMfC9wOz+9iFyiiLH4Pj5PKRP3+Mufuw8wH46w+BnKb2M16e5niOixUxhGp5vODvvf SgS93sl6cyOPnsXyQ6cqoC7oSbRFvFVwzsr20tLLM3HexryivwJchmK7TBJRJ896WQrQ PhBW/Z23ec4cpIZCNcltgMJN70YYz7oE1NHBlQWwaoR5rmSFB5jlJDZ6yQ5ze2kmao6u JgXt7Ys7w2UFX2KNHji9/jWRJ0dsXMW5DY+f1Ax8eFbdwdR831qlRTKosCQWD6jat94a VSqw== X-Gm-Message-State: ABy/qLZ+l4vNtNPds7+wgIH1ZqJVz1S4rbU/5xL+eDKc+rIo1yA+CJq5 88y4mUxV+Veg0oof82a9fHhVjQ== X-Google-Smtp-Source: APBJJlHTPEiI4d70NxX2nHst3XkAfiDRggXx1NmGRpA10Zf8iDezZWW8ih32EzxQIqpHPiYHvUOM5w== X-Received: by 2002:a17:90a:1f83:b0:268:3dc6:f0c5 with SMTP id x3-20020a17090a1f8300b002683dc6f0c5mr25027705pja.0.1691406698603; Mon, 07 Aug 2023 04:11:38 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.11.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:11:38 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 08/48] xenbus/backend: dynamically allocate the xen-backend shrinker Date: Mon, 7 Aug 2023 19:08:56 +0800 Message-Id: <20230807110936.21819-9-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the xen-backend shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/xen/xenbus/xenbus_probe_backend.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/drivers/xen/xenbus/xenbus_probe_backend.c b/drivers/xen/xenbus/xenbus_probe_backend.c index da96c260e26b..929c41a5ccee 100644 --- a/drivers/xen/xenbus/xenbus_probe_backend.c +++ b/drivers/xen/xenbus/xenbus_probe_backend.c @@ -284,13 +284,9 @@ static unsigned long backend_shrink_memory_count(struct shrinker *shrinker, return 0; } -static struct shrinker backend_memory_shrinker = { - .count_objects = backend_shrink_memory_count, - .seeks = DEFAULT_SEEKS, -}; - static int __init xenbus_probe_backend_init(void) { + struct shrinker *backend_memory_shrinker; static struct notifier_block xenstore_notifier = { .notifier_call = backend_probe_and_watch }; @@ -305,8 +301,16 @@ static int __init xenbus_probe_backend_init(void) register_xenstore_notifier(&xenstore_notifier); - if (register_shrinker(&backend_memory_shrinker, "xen-backend")) - pr_warn("shrinker registration failed\n"); + backend_memory_shrinker = shrinker_alloc(0, "xen-backend"); + if (!backend_memory_shrinker) { + pr_warn("shrinker allocation failed\n"); + return 0; + } + + backend_memory_shrinker->count_objects = backend_shrink_memory_count; + backend_memory_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(backend_memory_shrinker); return 0; } From patchwork Mon Aug 7 11:08:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712900 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C504EB64DD for ; Mon, 7 Aug 2023 11:13:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231510AbjHGLNv (ORCPT ); Mon, 7 Aug 2023 07:13:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47628 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231958AbjHGLNX (ORCPT ); Mon, 7 Aug 2023 07:13:23 -0400 Received: from mail-pl1-x634.google.com (mail-pl1-x634.google.com [IPv6:2607:f8b0:4864:20::634]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 58F12B3 for ; Mon, 7 Aug 2023 04:12:25 -0700 (PDT) Received: by mail-pl1-x634.google.com with SMTP id d9443c01a7336-1bba9539a23so9296665ad.1 for ; Mon, 07 Aug 2023 04:12:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406712; x=1692011512; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=ubpyp4SIhGXjO6/VTKiZvWjlRzyN8ANvKHVN5xSGnIw=; b=G6tJn+16QVti2qtu2hqYljseIE/XGpe1Yhsul4LFU6R/aCDAM7lceOlES83Z0B/Pue 2irlih/PCzGRhADqlmxdT4ZmTPg/rDw2XT4QeZKx/Tui9xhVWAtyJogqiocaYi2mPJVJ JfsH0RSoKbpVavaYBWWtyo/mJh8W+H0WFTE4SVefHn6UoqHLIS8l90Z//i2iVib88cLh SO8x9HJ9eijOF2Obr6A8OaZNG3N0xetNtsejNB5r0CVLeObeV8ZzJa8r4m2G8/H610tO JRFiieD8eIQL4G+uzuFBv5AMDY6TbkMqFwB+fegzuV4xQGReerwz1d1NP8JNZHZ17Zsd g+Fg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406712; x=1692011512; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ubpyp4SIhGXjO6/VTKiZvWjlRzyN8ANvKHVN5xSGnIw=; b=Z5AKU20SZbG7ospz9vULGJ/Fu/dK1FdGbr96Wy6PLb2PkUpZzUZzDwGmYWwPgK1NHB PeimLaaHy+Ve3bc3XxLr7fxzuYe6j1Xyw8UoGKEXdIRqXzhML1fHmYbgLg/82IH/+C9A 4I5hXhEC06rbqVMBeRxw7ZRSTN3RQKyxHard8XG+ZBjP9d9g3y2jBABdwGywXaSfU1Dx 4P4TigPk25jj7VTwhNSGb5n6JnPlZrrhNlcAdnFHYv8V+esEJckwDUbcwb3mt5OHh5O+ OMrH6xlsyzgTI6dYX+2f5M6uMGmW9Y4W/j6k3CaAscTKWpoVzGcn4B5vD6CdsikA3F+9 2r3w== X-Gm-Message-State: ABy/qLZdzxPoubbGYBx1waQR1V4UlMwnccUpWwIux5Fn/Rgx30lWJas2 Q4TXYTEVrS/+8tGKtsFKIqTDDA== X-Google-Smtp-Source: APBJJlGAdl0ewhYUg6UhJdRJKXIwq0U3XoR/AJshcbF16xE0A4mgQC4Umc8PgwnpC/Hq6tl8ikCZEw== X-Received: by 2002:a17:902:ea04:b0:1b8:17e8:547e with SMTP id s4-20020a170902ea0400b001b817e8547emr32460173plg.1.1691406712196; Mon, 07 Aug 2023 04:11:52 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.11.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:11:51 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 09/48] erofs: dynamically allocate the erofs-shrinker Date: Mon, 7 Aug 2023 19:08:57 +0800 Message-Id: <20230807110936.21819-10-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the erofs-shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/erofs/utils.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/fs/erofs/utils.c b/fs/erofs/utils.c index cc6fb9e98899..6e1a828e6ca3 100644 --- a/fs/erofs/utils.c +++ b/fs/erofs/utils.c @@ -270,19 +270,25 @@ static unsigned long erofs_shrink_scan(struct shrinker *shrink, return freed; } -static struct shrinker erofs_shrinker_info = { - .scan_objects = erofs_shrink_scan, - .count_objects = erofs_shrink_count, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *erofs_shrinker_info; int __init erofs_init_shrinker(void) { - return register_shrinker(&erofs_shrinker_info, "erofs-shrinker"); + erofs_shrinker_info = shrinker_alloc(0, "erofs-shrinker"); + if (!erofs_shrinker_info) + return -ENOMEM; + + erofs_shrinker_info->count_objects = erofs_shrink_count; + erofs_shrinker_info->scan_objects = erofs_shrink_scan; + erofs_shrinker_info->seeks = DEFAULT_SEEKS; + + shrinker_register(erofs_shrinker_info); + + return 0; } void erofs_exit_shrinker(void) { - unregister_shrinker(&erofs_shrinker_info); + shrinker_free(erofs_shrinker_info); } #endif /* !CONFIG_EROFS_FS_ZIP */ From patchwork Mon Aug 7 11:08:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711236 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5E05EB64DD for ; Mon, 7 Aug 2023 11:14:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231128AbjHGLOC (ORCPT ); Mon, 7 Aug 2023 07:14:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49346 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232064AbjHGLNc (ORCPT ); Mon, 7 Aug 2023 07:13:32 -0400 Received: from mail-pg1-x534.google.com (mail-pg1-x534.google.com [IPv6:2607:f8b0:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 041322697 for ; Mon, 7 Aug 2023 04:12:46 -0700 (PDT) Received: by mail-pg1-x534.google.com with SMTP id 41be03b00d2f7-51f64817809so360181a12.1 for ; Mon, 07 Aug 2023 04:12:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406725; x=1692011525; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=2qNGhCyBYRkIC+KqhUj1bienmPbnCoyI88yux10rL0c=; b=Xc/b9RVeZGabBZRzbFnLG60A3XcuysnQbX8QDB63xQh9Qsy33GgzK9r54ssZ8BRYsv Zo1icyrpegHwV8KMFlNuxd6Vv7rJh2g9STB5A/Cyu6q4WM+YLxsvvmbNVVdkSntCluNl It/PLVMY+sHjh9niVg4dAEeIOr6EcMWhtMnuFdCY7H6/MC8Iz/ZfTZnLr8OJnSIA36e9 mmNGX7xKmI8VWlsJYDncO9Zq/rF2h1OiOCACwI0xXgbsWIREHFfM5CkS8NCDLLHpFGlK JETB4OwnLh2lGmaSIFNM9gd2qMpLx0zP9hut1e08UtN8MQU5ZK62c3ni+xnuk2sIAfG7 kkXQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406725; x=1692011525; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=2qNGhCyBYRkIC+KqhUj1bienmPbnCoyI88yux10rL0c=; b=TXqUPkTPvEIu1m4ckCVIY5u/6D6TjDEXGaDHIXbpbs3q4cqLne8Unh0ksymFv9XJri Lz128tJ5Bb1gyFakjEecSMkpwWrzVjAe5XW7VvI51L6r7bayf09bFhdKgwCLhimL8+H6 XGqmoJNm02Pi8VSyYZVOI6frNoQnOuzOWeHzdK+qg5EDkLRYop9ZAgUPKqg1RHu0ZfHk XnqwsxpHnjdjZy8ZCZZ9qDm/ZyxcV1US4xvuWW1rb9M/zwENHSIsLoxGUnZs+uAchNKK ItjOxGvgedWqZu2rW37LmdBJmM45CLb6+4g+5Ygoi+UEPiYQNlQpgpCxWhzhcAerfSge sU+A== X-Gm-Message-State: AOJu0Yx1ObPMS5Q+q9Km9Sw8Trq7jmcxBaaNz4IjjzVS9j1zGD0j3W3B hAs6hDhPRqO4TeeqN+VVzNqxJw== X-Google-Smtp-Source: AGHT+IH0i+Trkswf5ZN/Zo/hyk0nSAkeHBCb5cnTJePkF3I+vCqNyDS8fjeM0LPIBtSn2h3E1rmPDQ== X-Received: by 2002:a17:90a:2909:b0:269:5bf7:d79c with SMTP id g9-20020a17090a290900b002695bf7d79cmr2210453pjd.1.1691406724771; Mon, 07 Aug 2023 04:12:04 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.11.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:12:04 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 10/48] f2fs: dynamically allocate the f2fs-shrinker Date: Mon, 7 Aug 2023 19:08:58 +0800 Message-Id: <20230807110936.21819-11-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the f2fs-shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/f2fs/super.c | 32 ++++++++++++++++++++++++-------- 1 file changed, 24 insertions(+), 8 deletions(-) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index aa1f9a3a8037..9092310582aa 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -83,11 +83,27 @@ void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate, #endif /* f2fs-wide shrinker description */ -static struct shrinker f2fs_shrinker_info = { - .scan_objects = f2fs_shrink_scan, - .count_objects = f2fs_shrink_count, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *f2fs_shrinker_info; + +static int __init f2fs_init_shrinker(void) +{ + f2fs_shrinker_info = shrinker_alloc(0, "f2fs-shrinker"); + if (!f2fs_shrinker_info) + return -ENOMEM; + + f2fs_shrinker_info->count_objects = f2fs_shrink_count; + f2fs_shrinker_info->scan_objects = f2fs_shrink_scan; + f2fs_shrinker_info->seeks = DEFAULT_SEEKS; + + shrinker_register(f2fs_shrinker_info); + + return 0; +} + +static void f2fs_exit_shrinker(void) +{ + shrinker_free(f2fs_shrinker_info); +} enum { Opt_gc_background, @@ -4940,7 +4956,7 @@ static int __init init_f2fs_fs(void) err = f2fs_init_sysfs(); if (err) goto free_garbage_collection_cache; - err = register_shrinker(&f2fs_shrinker_info, "f2fs-shrinker"); + err = f2fs_init_shrinker(); if (err) goto free_sysfs; err = register_filesystem(&f2fs_fs_type); @@ -4985,7 +5001,7 @@ static int __init init_f2fs_fs(void) f2fs_destroy_root_stats(); unregister_filesystem(&f2fs_fs_type); free_shrinker: - unregister_shrinker(&f2fs_shrinker_info); + f2fs_exit_shrinker(); free_sysfs: f2fs_exit_sysfs(); free_garbage_collection_cache: @@ -5017,7 +5033,7 @@ static void __exit exit_f2fs_fs(void) f2fs_destroy_post_read_processing(); f2fs_destroy_root_stats(); unregister_filesystem(&f2fs_fs_type); - unregister_shrinker(&f2fs_shrinker_info); + f2fs_exit_shrinker(); f2fs_exit_sysfs(); f2fs_destroy_garbage_collection_cache(); f2fs_destroy_extent_cache(); From patchwork Mon Aug 7 11:08:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712899 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F5BAC04FDF for ; Mon, 7 Aug 2023 11:14:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232060AbjHGLOD (ORCPT ); Mon, 7 Aug 2023 07:14:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47748 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231511AbjHGLNc (ORCPT ); Mon, 7 Aug 2023 07:13:32 -0400 Received: from mail-pg1-x535.google.com (mail-pg1-x535.google.com [IPv6:2607:f8b0:4864:20::535]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2DA6D198D for ; Mon, 7 Aug 2023 04:12:59 -0700 (PDT) Received: by mail-pg1-x535.google.com with SMTP id 41be03b00d2f7-55b5a37acb6so361998a12.0 for ; Mon, 07 Aug 2023 04:12:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406737; x=1692011537; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=XAY9+N2BbVQBjCT3MmFWkPxUR/2vf6o4m+CtMBoAzag=; b=Owhbp+vjTX9LgSb8kQ7MIhVXGKwDLhR+Ce+1Ax0621Bs9MrN8XWMe5+Ejw9lnwM3Ap IYUW911/vhmnbFJp/stmhIc489u8MPAzdlnhNeoJi8rBqpYOKUrjixaEdD0XprSya4Vj PDunDNjaDu16T3tMnzjFT3t7h/oKuuaUvjmMy7sBXTr5KsxElViOqZ7/5M9dmikw8+EO wMQGbexE8DINXXSrzaCt4DliIlnjdofAsiKIz1t/gb0CaZI+4t4MLa+CBQGQ2Bhdx8d2 /xQiP0jkFYD6YIUPc+4v26SX8VshwmbMbumt9peptq8jkLOVQze1kYBLFAMAnfkePzJe dicw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406737; x=1692011537; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=XAY9+N2BbVQBjCT3MmFWkPxUR/2vf6o4m+CtMBoAzag=; b=FmheGZMvq/sj4BOI38fLmPf/pSaM6YI8Gk7kQIp0zx13G0NJ1WxQ4APm9uwQAidGe+ R1Wd+S0kahbVvdv7SkUmbjF7Bu4OP6xP71dPJKkyzOpiG0J2u7u1rEeZQAaf180Pllws y1z+4lv30FIIuCc15v5TB22nI2M1CGhuS9EmzBGA2puws6XuQKbxIODTM4miFK4GDmh8 9i+orwpr3bGC/+pNakQNT8tvfkQvroI6LatrHJsmEKwdMRTPNHktb0VQYn0TEq3d5NGx u52oNmiDJnyJAYuj66Bt5T5oKmk8w2pzd/IX2Qx0uNlf/Dh1dH6gGRsKalYrHqt4KDou 7LRA== X-Gm-Message-State: ABy/qLZXZmzNaW/O6qNOSa484mENqPYF5qhm3Dfl2uv8H6Mrixxo8bBg Xpe+vBy7U7/d41rYAwSQUn96LQ== X-Google-Smtp-Source: APBJJlGzkEm3Uqt9ffvJXbz1uvSm9jYeOQTwgnDKGaV/IZVLtdfAA6YtivYmWFIriEmVEE/lzsK+Ow== X-Received: by 2002:a17:90a:faf:b0:268:abc:83d5 with SMTP id 44-20020a17090a0faf00b002680abc83d5mr23476433pjz.4.1691406737630; Mon, 07 Aug 2023 04:12:17 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.12.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:12:17 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 11/48] gfs2: dynamically allocate the gfs2-glock shrinker Date: Mon, 7 Aug 2023 19:08:59 +0800 Message-Id: <20230807110936.21819-12-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the gfs2-glock shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/gfs2/glock.c | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 1438e7465e30..8d582ba7514f 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -2046,11 +2046,7 @@ static unsigned long gfs2_glock_shrink_count(struct shrinker *shrink, return vfs_pressure_ratio(atomic_read(&lru_count)); } -static struct shrinker glock_shrinker = { - .seeks = DEFAULT_SEEKS, - .count_objects = gfs2_glock_shrink_count, - .scan_objects = gfs2_glock_shrink_scan, -}; +static struct shrinker *glock_shrinker; /** * glock_hash_walk - Call a function for glock in a hash bucket @@ -2472,13 +2468,19 @@ int __init gfs2_glock_init(void) return -ENOMEM; } - ret = register_shrinker(&glock_shrinker, "gfs2-glock"); - if (ret) { + glock_shrinker = shrinker_alloc(0, "gfs2-glock"); + if (!glock_shrinker) { destroy_workqueue(glock_workqueue); rhashtable_destroy(&gl_hash_table); - return ret; + return -ENOMEM; } + glock_shrinker->count_objects = gfs2_glock_shrink_count; + glock_shrinker->scan_objects = gfs2_glock_shrink_scan; + glock_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(glock_shrinker); + for (i = 0; i < GLOCK_WAIT_TABLE_SIZE; i++) init_waitqueue_head(glock_wait_table + i); @@ -2487,7 +2489,7 @@ int __init gfs2_glock_init(void) void gfs2_glock_exit(void) { - unregister_shrinker(&glock_shrinker); + shrinker_free(glock_shrinker); rhashtable_destroy(&gl_hash_table); destroy_workqueue(glock_workqueue); } From patchwork Mon Aug 7 11:09:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712898 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EDD7AC04A6A for ; Mon, 7 Aug 2023 11:15:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232137AbjHGLPF (ORCPT ); Mon, 7 Aug 2023 07:15:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48374 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232023AbjHGLOf (ORCPT ); Mon, 7 Aug 2023 07:14:35 -0400 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 84C172702 for ; Mon, 7 Aug 2023 04:13:19 -0700 (PDT) Received: by mail-pj1-x1030.google.com with SMTP id 98e67ed59e1d1-268663fb09cso630942a91.0 for ; Mon, 07 Aug 2023 04:13:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406751; x=1692011551; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=y2Zq84YPu5W9umXtWflPPzaPyFOqe/t1tbhlrQuOI+E=; b=Y3Gw/8I9wjDIixxDLIQ9R5eAEihH4V5EOGMa/tEQP2UVJcVR6XKMsoq0kNQA9Anemf f07XdP3K3VTdRiql0M+klRK3bCLbXjjp+xplnI9SAQQIK1LQ+ZTQ4iN7KAzzTyuvBW+2 22vOneIjM2lcCre/t1Mc8DL07qt3h0LYO3V6dBXrNJ+ZsacS8/3b5gEWrOt6ylq3sp75 +tN/NsYby1EhnscHKGVaTQLZ5Bd9+GL+XZMM1MIKbWLpVeAc6COrlmvCwmGvjTVu68WR OgVgTRpqhZcRZgjQYAuUYTgXANtTE72/EYkbNkp+iXkkiBUoh7hJkggb0sVF4vx/kVZQ USbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406751; x=1692011551; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=y2Zq84YPu5W9umXtWflPPzaPyFOqe/t1tbhlrQuOI+E=; b=DQQ+P2K1NDDJFjh/Ri5NG4iwheJThxaWVJFE0JC9lfMLR51O7z70utJ5UnHF1AKiP7 eLe+y7pE5gOT/799fJH0Doq/F4aypa6S0FE83+1ada+R95uxFiEhXpwwnGr24CZpZd3y K7aKgh7QoJ31LbjjNct+Q/ageJsiiEMtKLWpBBalyEbSt4vJGNGSbCdBhVMjGElue8wA aLmJvpH6PQ0z2oEgIFNZ7LO6NCBNsjAznbvitnl/f0OQx38x1ebrnwKiB3oD4qtwVvI1 PH9WLhU1DsIfRuJREZhRpqT6D3HKknrFcL2fda4zYNY+TpPq/w/5L0hWe7/TRjKCfnRW +cCQ== X-Gm-Message-State: ABy/qLZdAvYUorM+DGWPSVvLgrrRim+S/AJDjVzbnXH+96InNteh2GFW G0JKU7LxgNDnleVk+Xa2nAnvPA== X-Google-Smtp-Source: APBJJlFA47zqmiKwpfw7q81pKFEqmAkA29wiqRNlMoLoIZqzioc4qMsA62pUfPaD7HBA/F0aUxQzvA== X-Received: by 2002:a17:90a:6c97:b0:263:730b:f568 with SMTP id y23-20020a17090a6c9700b00263730bf568mr23062652pjj.3.1691406750926; Mon, 07 Aug 2023 04:12:30 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.12.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:12:30 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 12/48] gfs2: dynamically allocate the gfs2-qd shrinker Date: Mon, 7 Aug 2023 19:09:00 +0800 Message-Id: <20230807110936.21819-13-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the gfs2-qd shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/gfs2/main.c | 6 +++--- fs/gfs2/quota.c | 26 ++++++++++++++++++++------ fs/gfs2/quota.h | 3 ++- 3 files changed, 25 insertions(+), 10 deletions(-) diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c index afcb32854f14..e47b1cc79f59 100644 --- a/fs/gfs2/main.c +++ b/fs/gfs2/main.c @@ -147,7 +147,7 @@ static int __init init_gfs2_fs(void) if (!gfs2_trans_cachep) goto fail_cachep8; - error = register_shrinker(&gfs2_qd_shrinker, "gfs2-qd"); + error = gfs2_qd_shrinker_init(); if (error) goto fail_shrinker; @@ -196,7 +196,7 @@ static int __init init_gfs2_fs(void) fail_wq2: destroy_workqueue(gfs_recovery_wq); fail_wq1: - unregister_shrinker(&gfs2_qd_shrinker); + gfs2_qd_shrinker_exit(); fail_shrinker: kmem_cache_destroy(gfs2_trans_cachep); fail_cachep8: @@ -229,7 +229,7 @@ static int __init init_gfs2_fs(void) static void __exit exit_gfs2_fs(void) { - unregister_shrinker(&gfs2_qd_shrinker); + gfs2_qd_shrinker_exit(); gfs2_glock_exit(); gfs2_unregister_debugfs(); unregister_filesystem(&gfs2_fs_type); diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c index 632806c5ed67..d1e4d8ab8fa1 100644 --- a/fs/gfs2/quota.c +++ b/fs/gfs2/quota.c @@ -186,13 +186,27 @@ static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink, return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc)); } -struct shrinker gfs2_qd_shrinker = { - .count_objects = gfs2_qd_shrink_count, - .scan_objects = gfs2_qd_shrink_scan, - .seeks = DEFAULT_SEEKS, - .flags = SHRINKER_NUMA_AWARE, -}; +static struct shrinker *gfs2_qd_shrinker; + +int __init gfs2_qd_shrinker_init(void) +{ + gfs2_qd_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE, "gfs2-qd"); + if (!gfs2_qd_shrinker) + return -ENOMEM; + + gfs2_qd_shrinker->count_objects = gfs2_qd_shrink_count; + gfs2_qd_shrinker->scan_objects = gfs2_qd_shrink_scan; + gfs2_qd_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(gfs2_qd_shrinker); + return 0; +} + +void gfs2_qd_shrinker_exit(void) +{ + shrinker_free(gfs2_qd_shrinker); +} static u64 qd2index(struct gfs2_quota_data *qd) { diff --git a/fs/gfs2/quota.h b/fs/gfs2/quota.h index 21ada332d555..f0d54dcbbc75 100644 --- a/fs/gfs2/quota.h +++ b/fs/gfs2/quota.h @@ -59,7 +59,8 @@ static inline int gfs2_quota_lock_check(struct gfs2_inode *ip, } extern const struct quotactl_ops gfs2_quotactl_ops; -extern struct shrinker gfs2_qd_shrinker; +int __init gfs2_qd_shrinker_init(void); +void gfs2_qd_shrinker_exit(void); extern struct list_lru gfs2_qd_lru; extern void __init gfs2_quota_hash_init(void); From patchwork Mon Aug 7 11:09:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711235 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7298EB64DD for ; Mon, 7 Aug 2023 11:14:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232111AbjHGLOk (ORCPT ); Mon, 7 Aug 2023 07:14:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47784 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231407AbjHGLO3 (ORCPT ); Mon, 7 Aug 2023 07:14:29 -0400 Received: from mail-pg1-x52c.google.com (mail-pg1-x52c.google.com [IPv6:2607:f8b0:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0FE582D48 for ; Mon, 7 Aug 2023 04:13:39 -0700 (PDT) Received: by mail-pg1-x52c.google.com with SMTP id 41be03b00d2f7-5643140aa5fso525571a12.0 for ; Mon, 07 Aug 2023 04:13:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406764; x=1692011564; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=XXAG7UeexodYStcT1Y2gz+/6q+0E2xrK+D1h2eKApUE=; b=aL2IlnUybxJBSaUyx5/2hb4H2bp/OBgBmpkvxoB1jU+rSMlmYgotW9aghIyS5IGFTu jFnKPHdHImGCYC2E/ABE0MKtaUZM35JefrItnSynMzWwfh9y6Muq0ow4RXH7tUjQQfcP Mb/jNbJTqI64OH5TZAbe/9B64ipZHwjSbqJcPzS81ONTFfdvn1WQf8A1oxt4tY2+xFm3 qLJTVdHdHHLy/H07ztqOBHi1YT6PCSLEiwm3BmVRH+v8KbcNGmsDXIWIkoSvX1jpUSeE +aIaBM9zmcPun7sjvVC0D+UUovECfFdX/YnWZ3U8UI2BqXU1g5ckeiBNnyvyn5q9jj5E E1iw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406764; x=1692011564; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=XXAG7UeexodYStcT1Y2gz+/6q+0E2xrK+D1h2eKApUE=; b=A2UOE6nZA/PXR4cRU4DseM2XIbZJQlfrORy3Bn8yorVEsMJrM3PNWiLj87LT1yp3t5 KSep0STWB4XJAC80QT48u2CRT+4WORw2w1qTO+bm9AWaUA8vCgJ1SyD8V+u6TJdvyn24 m7FCdPz2Xp8hBvd9mxdZbESkAa4sAG6m+6iYs6wzXvcI6NT83B3fli0wGffnJ70UkJDX 7x2MzyNQBSNMvMtfANsfZj38rhx6slHYJ8KzDVg+irsihUgENXIH2NMwjqPO2TOlIquR JJ780BYmzZFHRMKTyUWkBU8GxoJvS04Jf34/Fl03umIy14HwqszUGA0yYGLiPZU5fQvo 8NjA== X-Gm-Message-State: AOJu0Yza7coT1LhLttPBPMwXKL1VfvPlgWzExuVsSPlupDC5Iu0TRjaB u5Lw0PyerfGWak0YBo8pDWIyJg== X-Google-Smtp-Source: AGHT+IE0EldDhRUbVC2QQ5qQQy0UrFFq3L83zUgt+LShkd8AG+beTExy84fPX5FeRRz/rZ+raVP35g== X-Received: by 2002:a17:90a:9c3:b0:269:41cf:7212 with SMTP id 61-20020a17090a09c300b0026941cf7212mr4959141pjo.4.1691406764622; Mon, 07 Aug 2023 04:12:44 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.12.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:12:44 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 13/48] NFSv4.2: dynamically allocate the nfs-xattr shrinkers Date: Mon, 7 Aug 2023 19:09:01 +0800 Message-Id: <20230807110936.21819-14-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the nfs-xattr shrinkers. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/nfs/nfs42xattr.c | 87 +++++++++++++++++++++++---------------------- 1 file changed, 44 insertions(+), 43 deletions(-) diff --git a/fs/nfs/nfs42xattr.c b/fs/nfs/nfs42xattr.c index 911f634ba3da..2ad66a8922f4 100644 --- a/fs/nfs/nfs42xattr.c +++ b/fs/nfs/nfs42xattr.c @@ -796,28 +796,9 @@ static unsigned long nfs4_xattr_cache_scan(struct shrinker *shrink, static unsigned long nfs4_xattr_entry_scan(struct shrinker *shrink, struct shrink_control *sc); -static struct shrinker nfs4_xattr_cache_shrinker = { - .count_objects = nfs4_xattr_cache_count, - .scan_objects = nfs4_xattr_cache_scan, - .seeks = DEFAULT_SEEKS, - .flags = SHRINKER_MEMCG_AWARE, -}; - -static struct shrinker nfs4_xattr_entry_shrinker = { - .count_objects = nfs4_xattr_entry_count, - .scan_objects = nfs4_xattr_entry_scan, - .seeks = DEFAULT_SEEKS, - .batch = 512, - .flags = SHRINKER_MEMCG_AWARE, -}; - -static struct shrinker nfs4_xattr_large_entry_shrinker = { - .count_objects = nfs4_xattr_entry_count, - .scan_objects = nfs4_xattr_entry_scan, - .seeks = 1, - .batch = 512, - .flags = SHRINKER_MEMCG_AWARE, -}; +static struct shrinker *nfs4_xattr_cache_shrinker; +static struct shrinker *nfs4_xattr_entry_shrinker; +static struct shrinker *nfs4_xattr_large_entry_shrinker; static enum lru_status cache_lru_isolate(struct list_head *item, @@ -943,7 +924,7 @@ nfs4_xattr_entry_scan(struct shrinker *shrink, struct shrink_control *sc) struct nfs4_xattr_entry *entry; struct list_lru *lru; - lru = (shrink == &nfs4_xattr_large_entry_shrinker) ? + lru = (shrink == nfs4_xattr_large_entry_shrinker) ? &nfs4_xattr_large_entry_lru : &nfs4_xattr_entry_lru; freed = list_lru_shrink_walk(lru, sc, entry_lru_isolate, &dispose); @@ -971,7 +952,7 @@ nfs4_xattr_entry_count(struct shrinker *shrink, struct shrink_control *sc) unsigned long count; struct list_lru *lru; - lru = (shrink == &nfs4_xattr_large_entry_shrinker) ? + lru = (shrink == nfs4_xattr_large_entry_shrinker) ? &nfs4_xattr_large_entry_lru : &nfs4_xattr_entry_lru; count = list_lru_shrink_count(lru, sc); @@ -991,18 +972,34 @@ static void nfs4_xattr_cache_init_once(void *p) INIT_LIST_HEAD(&cache->dispose); } -static int nfs4_xattr_shrinker_init(struct shrinker *shrinker, - struct list_lru *lru, const char *name) +typedef unsigned long (*count_objects_cb)(struct shrinker *s, + struct shrink_control *sc); +typedef unsigned long (*scan_objects_cb)(struct shrinker *s, + struct shrink_control *sc); + +static int __init nfs4_xattr_shrinker_init(struct shrinker **shrinker, + struct list_lru *lru, const char *name, + count_objects_cb count, + scan_objects_cb scan, long batch, int seeks) { - int ret = 0; + int ret; - ret = register_shrinker(shrinker, name); - if (ret) + *shrinker = shrinker_alloc(SHRINKER_MEMCG_AWARE, name); + if (!*shrinker) + return -ENOMEM; + + ret = list_lru_init_memcg(lru, *shrinker); + if (ret) { + shrinker_free(*shrinker); return ret; + } - ret = list_lru_init_memcg(lru, shrinker); - if (ret) - unregister_shrinker(shrinker); + (*shrinker)->count_objects = count; + (*shrinker)->scan_objects = scan; + (*shrinker)->batch = batch; + (*shrinker)->seeks = seeks; + + shrinker_register(*shrinker); return ret; } @@ -1010,7 +1007,7 @@ static int nfs4_xattr_shrinker_init(struct shrinker *shrinker, static void nfs4_xattr_shrinker_destroy(struct shrinker *shrinker, struct list_lru *lru) { - unregister_shrinker(shrinker); + shrinker_free(shrinker); list_lru_destroy(lru); } @@ -1026,27 +1023,31 @@ int __init nfs4_xattr_cache_init(void) return -ENOMEM; ret = nfs4_xattr_shrinker_init(&nfs4_xattr_cache_shrinker, - &nfs4_xattr_cache_lru, - "nfs-xattr_cache"); + &nfs4_xattr_cache_lru, "nfs-xattr_cache", + nfs4_xattr_cache_count, + nfs4_xattr_cache_scan, 0, DEFAULT_SEEKS); if (ret) goto out1; ret = nfs4_xattr_shrinker_init(&nfs4_xattr_entry_shrinker, - &nfs4_xattr_entry_lru, - "nfs-xattr_entry"); + &nfs4_xattr_entry_lru, "nfs-xattr_entry", + nfs4_xattr_entry_count, + nfs4_xattr_entry_scan, 512, DEFAULT_SEEKS); if (ret) goto out2; ret = nfs4_xattr_shrinker_init(&nfs4_xattr_large_entry_shrinker, &nfs4_xattr_large_entry_lru, - "nfs-xattr_large_entry"); + "nfs-xattr_large_entry", + nfs4_xattr_entry_count, + nfs4_xattr_entry_scan, 512, 1); if (!ret) return 0; - nfs4_xattr_shrinker_destroy(&nfs4_xattr_entry_shrinker, + nfs4_xattr_shrinker_destroy(nfs4_xattr_entry_shrinker, &nfs4_xattr_entry_lru); out2: - nfs4_xattr_shrinker_destroy(&nfs4_xattr_cache_shrinker, + nfs4_xattr_shrinker_destroy(nfs4_xattr_cache_shrinker, &nfs4_xattr_cache_lru); out1: kmem_cache_destroy(nfs4_xattr_cache_cachep); @@ -1056,11 +1057,11 @@ int __init nfs4_xattr_cache_init(void) void nfs4_xattr_cache_exit(void) { - nfs4_xattr_shrinker_destroy(&nfs4_xattr_large_entry_shrinker, + nfs4_xattr_shrinker_destroy(nfs4_xattr_large_entry_shrinker, &nfs4_xattr_large_entry_lru); - nfs4_xattr_shrinker_destroy(&nfs4_xattr_entry_shrinker, + nfs4_xattr_shrinker_destroy(nfs4_xattr_entry_shrinker, &nfs4_xattr_entry_lru); - nfs4_xattr_shrinker_destroy(&nfs4_xattr_cache_shrinker, + nfs4_xattr_shrinker_destroy(nfs4_xattr_cache_shrinker, &nfs4_xattr_cache_lru); kmem_cache_destroy(nfs4_xattr_cache_cachep); } From patchwork Mon Aug 7 11:09:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711225 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4D8AAC001DF for ; Mon, 7 Aug 2023 11:26:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232512AbjHGL04 (ORCPT ); Mon, 7 Aug 2023 07:26:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232362AbjHGL0m (ORCPT ); Mon, 7 Aug 2023 07:26:42 -0400 Received: from mail-qk1-x736.google.com (mail-qk1-x736.google.com [IPv6:2607:f8b0:4864:20::736]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9597A4228 for ; Mon, 7 Aug 2023 04:23:11 -0700 (PDT) Received: by mail-qk1-x736.google.com with SMTP id af79cd13be357-7576b53e75eso67228985a.1 for ; Mon, 07 Aug 2023 04:23:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407326; x=1692012126; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=iXZOOFmuwv6/pQ9jzhgVENlSQpZ5agnqrhquB4Bsoao=; b=eCQcUHf/qXgyKo1YCkpGg6HRPqHvGdL4LhYCbF43gSEENTtMCvauACLoRoobJZf5dg RTiVqN8JFJfu9+HqktdzfPPPXoWOZ/hXQgdy59kMcDRv0e+mtvWxsHf/fZ454S65Z5H6 dDiXlJ0AqfcHENrv4GdJv07NR+v0EEx0ktp5BgxJJtcYeXXkZN7PuM3qjQV2U7wmWXla ZZmc72EcP0+ih14AEUl25iAO95U7Q9WNbI8lJ9XwoFxFSSsJGjRWE+IHQsejIZt3Y5Qd AckmxhCLLuwQKF/7T6kewDqJVu0zqIT+olNh6JP1UP9kHx3fLbMjQ9ePMaiIFiDVxpXH WTIQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407326; x=1692012126; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=iXZOOFmuwv6/pQ9jzhgVENlSQpZ5agnqrhquB4Bsoao=; b=flLGdYsT0jm1sQkZcsRwjQvzf3bFv3FYd8C7goWTTbon2Y2YdTs24roaJb68XGvnRu TQtbcGwXFdkonezFxbq48iz4Sxf/GX4H6D7ec+yY6lTaYnSpxBG7mIQVNvN486TtXJ5D n5vGjgSCrRcD34ZHMwrOMYb9ZeeleAKpqVcwoQZrDBdrO7lhivczxmPt+xrvIhQ5Gvbf N7TwI1+pM2cU/7rzAAic/f4Lk/R/sysfuCuRKGzOtLdcIKgprKsnEWUQr43a/jbiSi+n owAt9IlbWJp8HriFJUsqJ7/wZCCXGVbzh96XjzTWw5s7RTPvaXwHm/rXhdxYZBecj3Zh wW4A== X-Gm-Message-State: AOJu0Yz/2BF4qDqhTS8MEk7Lps9ijiAHvedaDo7md/U3+X8W9MrrAAhY rANfduGDo0staK1flwqrhzH1P5ls96BgULCIEVM= X-Google-Smtp-Source: APBJJlFDSvCAq9gTdHkFF7Bzn2YL0W/qaEPzJ7AdGJ/zjCXgG1JFMDLiaFr2l43qqes0mOglkhZu9g== X-Received: by 2002:a17:902:f688:b0:1bb:d7d4:e2b with SMTP id l8-20020a170902f68800b001bbd7d40e2bmr33138766plg.0.1691406778592; Mon, 07 Aug 2023 04:12:58 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.12.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:12:58 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 14/48] nfs: dynamically allocate the nfs-acl shrinker Date: Mon, 7 Aug 2023 19:09:02 +0800 Message-Id: <20230807110936.21819-15-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the nfs-acl shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/nfs/super.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 2284f749d892..1b5cd0444dda 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -129,11 +129,7 @@ static void nfs_ssc_unregister_ops(void) } #endif /* CONFIG_NFS_V4_2 */ -static struct shrinker acl_shrinker = { - .count_objects = nfs_access_cache_count, - .scan_objects = nfs_access_cache_scan, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *acl_shrinker; /* * Register the NFS filesystems @@ -153,9 +149,19 @@ int __init register_nfs_fs(void) ret = nfs_register_sysctl(); if (ret < 0) goto error_2; - ret = register_shrinker(&acl_shrinker, "nfs-acl"); - if (ret < 0) + + acl_shrinker = shrinker_alloc(0, "nfs-acl"); + if (!acl_shrinker) { + ret = -ENOMEM; goto error_3; + } + + acl_shrinker->count_objects = nfs_access_cache_count; + acl_shrinker->scan_objects = nfs_access_cache_scan; + acl_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(acl_shrinker); + #ifdef CONFIG_NFS_V4_2 nfs_ssc_register_ops(); #endif @@ -175,7 +181,7 @@ int __init register_nfs_fs(void) */ void __exit unregister_nfs_fs(void) { - unregister_shrinker(&acl_shrinker); + shrinker_free(acl_shrinker); nfs_unregister_sysctl(); unregister_nfs4_fs(); #ifdef CONFIG_NFS_V4_2 From patchwork Mon Aug 7 11:09:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712895 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51A7FC001DF for ; Mon, 7 Aug 2023 11:21:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232422AbjHGLVy (ORCPT ); Mon, 7 Aug 2023 07:21:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55046 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232245AbjHGLVQ (ORCPT ); Mon, 7 Aug 2023 07:21:16 -0400 Received: from mail-pf1-f177.google.com (mail-pf1-f177.google.com [209.85.210.177]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66528211F for ; Mon, 7 Aug 2023 04:19:27 -0700 (PDT) Received: by mail-pf1-f177.google.com with SMTP id d2e1a72fcca58-686f6231bdeso1246279b3a.1 for ; Mon, 07 Aug 2023 04:19:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406791; x=1692011591; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=urGrhHBCGKwKuhIkQmOHRuysXuy1mToQA+AaHWoY6PY=; b=gvEcin7S0wJ5rW0wtj9WnWp/4gO3FOqyEc5Qy3KVjjCOMIdl063r7goatTKMU5K63u IABDDkTZbyMiPq/rwoG72XrgfLWlV6/YJwymkZtRfBVcrDOzJOk+V88T6EEEXGW6nfh0 le0xVwnZY7As0nXjZy+hSjIWRCXvYGRHiEKZrDZnQb7QflVpjM7uq/81aSxj3traKDGt VXa/baYLLxxBhWBawSSBHT4dMsZ/NRoyUnn0XTD8JWz4/O0ULe9Suh4wohOUxiotc5cA +kJEwQbIJfS1Vrk1T3/Loi8TKjO+pow/TrGBcBE2xp4OSLxBFU0bCUPycoGAdA8SsoOk yeOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406791; x=1692011591; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=urGrhHBCGKwKuhIkQmOHRuysXuy1mToQA+AaHWoY6PY=; b=g3tCcWmK7EiWBJZCBLJMx7SmWxAprLxf7eEfX9X7689FWlv1YWdhCzAwBCf3PuSUQ/ znMJ+bBsbIOp3lYDZU8aY/yUkh8fNHuGu2NQ+TkmA20/kW+Dt8GlPlhT9RaoLaJbPgH6 YYwk4+FkD0TqGP/kQdGJ9td+2eJVhRQlE7rQYEpmG9v9OvYMr4NKYtDZRqZHIso22w4U ZvMyn3YE23pgcnkv5a2m6OoIAG+45rcneOYG+e4xOFF8AXCSXCcaVn2W5ItH0W5lXcUi Kiwu10o+GEgYzoZYM54piiyllnu69BAMstJRFmzsV6J5QsPAPmxxjaCWxonDkm9B76IL wzAg== X-Gm-Message-State: ABy/qLbePru6tFiJEkggxQOcARryiiDP9WcaNRYHOZ49W1zf0mRbH1mJ yjAkh2kPPCUBgeHCr7/IzLSZTA== X-Google-Smtp-Source: APBJJlGG9fl/KZM7Wu/aB3nA3qPBXzAgCls0ii/X4UboFM2rQSd7zbDq190u8vBbdPOZ8QFUsdy1lw== X-Received: by 2002:a17:90a:faf:b0:268:abc:83d5 with SMTP id 44-20020a17090a0faf00b002680abc83d5mr23478200pjz.4.1691406791204; Mon, 07 Aug 2023 04:13:11 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.12.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:13:10 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 15/48] nfsd: dynamically allocate the nfsd-filecache shrinker Date: Mon, 7 Aug 2023 19:09:03 +0800 Message-Id: <20230807110936.21819-16-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the nfsd-filecache shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/nfsd/filecache.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index ee9c923192e0..9c62b4502539 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -521,11 +521,7 @@ nfsd_file_lru_scan(struct shrinker *s, struct shrink_control *sc) return ret; } -static struct shrinker nfsd_file_shrinker = { - .scan_objects = nfsd_file_lru_scan, - .count_objects = nfsd_file_lru_count, - .seeks = 1, -}; +static struct shrinker *nfsd_file_shrinker; /** * nfsd_file_cond_queue - conditionally unhash and queue a nfsd_file @@ -746,12 +742,19 @@ nfsd_file_cache_init(void) goto out_err; } - ret = register_shrinker(&nfsd_file_shrinker, "nfsd-filecache"); - if (ret) { - pr_err("nfsd: failed to register nfsd_file_shrinker: %d\n", ret); + nfsd_file_shrinker = shrinker_alloc(0, "nfsd-filecache"); + if (!nfsd_file_shrinker) { + ret = -ENOMEM; + pr_err("nfsd: failed to allocate nfsd_file_shrinker\n"); goto out_lru; } + nfsd_file_shrinker->count_objects = nfsd_file_lru_count; + nfsd_file_shrinker->scan_objects = nfsd_file_lru_scan; + nfsd_file_shrinker->seeks = 1; + + shrinker_register(nfsd_file_shrinker); + ret = lease_register_notifier(&nfsd_file_lease_notifier); if (ret) { pr_err("nfsd: unable to register lease notifier: %d\n", ret); @@ -774,7 +777,7 @@ nfsd_file_cache_init(void) out_notifier: lease_unregister_notifier(&nfsd_file_lease_notifier); out_shrinker: - unregister_shrinker(&nfsd_file_shrinker); + shrinker_free(nfsd_file_shrinker); out_lru: list_lru_destroy(&nfsd_file_lru); out_err: @@ -891,7 +894,7 @@ nfsd_file_cache_shutdown(void) return; lease_unregister_notifier(&nfsd_file_lease_notifier); - unregister_shrinker(&nfsd_file_shrinker); + shrinker_free(nfsd_file_shrinker); /* * make sure all callers of nfsd_file_lru_cb are done before * calling nfsd_file_cache_purge From patchwork Mon Aug 7 11:09:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711234 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2BFA2C04A94 for ; Mon, 7 Aug 2023 11:16:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232235AbjHGLQ0 (ORCPT ); Mon, 7 Aug 2023 07:16:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52968 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232204AbjHGLQJ (ORCPT ); Mon, 7 Aug 2023 07:16:09 -0400 Received: from mail-io1-xd32.google.com (mail-io1-xd32.google.com [IPv6:2607:f8b0:4864:20::d32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9AF7226A6 for ; Mon, 7 Aug 2023 04:14:43 -0700 (PDT) Received: by mail-io1-xd32.google.com with SMTP id ca18e2360f4ac-790b6761117so45036039f.0 for ; Mon, 07 Aug 2023 04:14:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406804; x=1692011604; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=4VJlLpDqVGiuvI83ez+3bl7yR5bVuWalBgtTU2vfBLE=; b=i2oZ2Se5RaRdFd0q9t3NqBTv/dUkxD/p2SyHpAjMjg/XHGqyx1ejwAfepurqt3olXd 4JrDoh1Y9dLDoFntnleeQjfq8XZjg4nTjOSD4Duga+gvfwhzkhg3QVfdrOJlicPQaYUD v5DwTanMH6RhkvK4rWOetuDFETnSCGxcV41PCfrrWGGU2b+vPg8IYLTIauqtUI6qQnyf JDKJFxqA5C/eh/Oo8gwkHqwPIIO1pJg4e68ItW2uJIdbbavFER6b/PwVILGTxzeWrF6b lEtQmpfrwSnO090W7cEUPihusqog8pTCjc32QMYuqZWzqkk8YiBOx308Pfsd+2Yt04OK T2NQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406804; x=1692011604; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=4VJlLpDqVGiuvI83ez+3bl7yR5bVuWalBgtTU2vfBLE=; b=hr9HAQ7l4RG/KvA3+Gd1vn7D3DjVrKZiDSvymyHT7v3dmknuVSbt+fNYHeQTNLTX61 0FcT/LfHmCXDo4Mjfo2ft8WEm2txQqB3fw34IkV9GxMxnNnyBQ+N63Ed3AnnC7n+lYri GZ2vVCjXG/AOzaFNzATYKH1zW4+i+WtNxB9AhaEalKDLKGRgLO+iPoWAgGz2ZP7Kg/Hd AnvLQQRo0P4ZATIV2UXI1p2OQCIRqNmVTRh/YDGpbNsIGalUcgzBRWcBTWpmpMZSz/oe B86Quohi+OIXwiZDOCROmIUkMw/d3aDqbbS4PAEdU5+vH6Q2jpWatYuIYIvh95DzhuY+ CSsw== X-Gm-Message-State: ABy/qLZiM3YOlTWmmbTzkJ3051Wfh98zWQtPC5d6I7vBMe9FNI51Mmf+ pJ/DXm0w2fUPl9JwX4oZVz9ZYw== X-Google-Smtp-Source: APBJJlG6KxjpSP18cuDMGPLwCal+2Q6XOYkRmOlR+93TSEU+QOz0TNU1VRvfHZPrdEq648UTFq+gsw== X-Received: by 2002:a92:d944:0:b0:349:3c78:fd14 with SMTP id l4-20020a92d944000000b003493c78fd14mr13499018ilq.1.1691406803912; Mon, 07 Aug 2023 04:13:23 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.13.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:13:23 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 16/48] quota: dynamically allocate the dquota-cache shrinker Date: Mon, 7 Aug 2023 19:09:04 +0800 Message-Id: <20230807110936.21819-17-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the dquota-cache shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/quota/dquot.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 9e72bfe8bbad..c303cffdf433 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -791,12 +791,6 @@ dqcache_shrink_count(struct shrinker *shrink, struct shrink_control *sc) percpu_counter_read_positive(&dqstats.counter[DQST_FREE_DQUOTS])); } -static struct shrinker dqcache_shrinker = { - .count_objects = dqcache_shrink_count, - .scan_objects = dqcache_shrink_scan, - .seeks = DEFAULT_SEEKS, -}; - /* * Safely release dquot and put reference to dquot. */ @@ -2956,6 +2950,7 @@ static int __init dquot_init(void) { int i, ret; unsigned long nr_hash, order; + struct shrinker *dqcache_shrinker; printk(KERN_NOTICE "VFS: Disk quotas %s\n", __DQUOT_VERSION__); @@ -2990,8 +2985,15 @@ static int __init dquot_init(void) pr_info("VFS: Dquot-cache hash table entries: %ld (order %ld," " %ld bytes)\n", nr_hash, order, (PAGE_SIZE << order)); - if (register_shrinker(&dqcache_shrinker, "dquota-cache")) - panic("Cannot register dquot shrinker"); + dqcache_shrinker = shrinker_alloc(0, "dquota-cache"); + if (!dqcache_shrinker) + panic("Cannot allocate dquot shrinker"); + + dqcache_shrinker->count_objects = dqcache_shrink_count; + dqcache_shrinker->scan_objects = dqcache_shrink_scan; + dqcache_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(dqcache_shrinker); return 0; } From patchwork Mon Aug 7 11:09:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711223 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DB5D1C001B0 for ; Mon, 7 Aug 2023 11:30:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232773AbjHGLaT (ORCPT ); Mon, 7 Aug 2023 07:30:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35872 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232787AbjHGLaG (ORCPT ); Mon, 7 Aug 2023 07:30:06 -0400 Received: from mail-pg1-f177.google.com (mail-pg1-f177.google.com [209.85.215.177]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AFB222D70 for ; Mon, 7 Aug 2023 04:26:55 -0700 (PDT) Received: by mail-pg1-f177.google.com with SMTP id 41be03b00d2f7-5643140aa5fso527863a12.0 for ; Mon, 07 Aug 2023 04:26:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407503; x=1692012303; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=et7oKjMo2RpAm9eGe6PO8KzXkO6yMET8jj6KuxhxE1o=; b=JaXJ4Hhftms38allV8/Xb6zSqCJUIh9NhuT01Fx9b5qOIoC2S535i5zhxJz5N4sA1K 6VA2qq4l9FdAfGMy4vGza+9d/2KiFCcsO2A2pRs2lNTB6XWoVgUJjRZ/If1UXiiJZ1Jb TbzTbjTTqgnSXwdrG3HUQ0Qep9/xXBdhqYgl6/xohdWXWj86MaSPOrC13Nhhl5V7RMLn fsB5KCMzaC/5BpuMmjPEBU8/fuN9E2+1adNiL7UA3+N8wSkm0uFALI7Mt59PFYzkFOEZ P2pFro0ljAwINU9fi90BaKEOBrrs2iCOl3jC3qdbM+2AeHFROToAiHb2tlRJibdIKIbx F4ow== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407503; x=1692012303; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=et7oKjMo2RpAm9eGe6PO8KzXkO6yMET8jj6KuxhxE1o=; b=Q1NjAy3XF2+mm1gUUZmIF1GJ+dJZeexQX/px9zQI1Cty//fe/XPivnPlSp4ru3KMPV JYuALgMFh1t/Z72VwJdGBQ1C+PG9GPEOj+UHUc1jCZ1QQrKhddIz7yyginoM3opyVuVO asQUe2Qe5yuToz9zrnRszL0ulrDd3YX4XGqSDsNzq2DMf3+lxfle58T9oPJdjoYIKHOD SWJp6CO1VYEL32o+gMDJ6CzNT5zSUHh4nEQsMRkpuANrFDQWOxEcgYnbM/KDaRONW3Pq 0ijLJ4ahA7mMCcdXaJurOuZxiuRaY/BSe7xxnPJX5Bo9NAfDTElZMFtq09hcn6evIhu1 eN5w== X-Gm-Message-State: AOJu0YxQesnfEf1pmvHwbYxkttOM4Y8b0BbZqp9go2/ntByFmULmOcH+ cmKcVWiael94pDG/lsXL5slhcijNCKSa4Pvbfk4= X-Google-Smtp-Source: APBJJlF9QaWRkA2HFZAXDPGIksSZq6NqNIS7MDluuBXjMUyGz8OacRKwa0/I1dCKrdRRT8VidP2X/g== X-Received: by 2002:a17:902:ea04:b0:1b8:a27d:f591 with SMTP id s4-20020a170902ea0400b001b8a27df591mr32781910plg.5.1691406816716; Mon, 07 Aug 2023 04:13:36 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.13.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:13:36 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 17/48] ubifs: dynamically allocate the ubifs-slab shrinker Date: Mon, 7 Aug 2023 19:09:05 +0800 Message-Id: <20230807110936.21819-18-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the ubifs-slab shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/ubifs/super.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index b08fb28d16b5..c690782388a8 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -54,11 +54,7 @@ module_param_cb(default_version, &ubifs_default_version_ops, &ubifs_default_vers static struct kmem_cache *ubifs_inode_slab; /* UBIFS TNC shrinker description */ -static struct shrinker ubifs_shrinker_info = { - .scan_objects = ubifs_shrink_scan, - .count_objects = ubifs_shrink_count, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *ubifs_shrinker_info; /** * validate_inode - validate inode. @@ -2373,7 +2369,7 @@ static void inode_slab_ctor(void *obj) static int __init ubifs_init(void) { - int err; + int err = -ENOMEM; BUILD_BUG_ON(sizeof(struct ubifs_ch) != 24); @@ -2439,10 +2435,16 @@ static int __init ubifs_init(void) if (!ubifs_inode_slab) return -ENOMEM; - err = register_shrinker(&ubifs_shrinker_info, "ubifs-slab"); - if (err) + ubifs_shrinker_info = shrinker_alloc(0, "ubifs-slab"); + if (!ubifs_shrinker_info) goto out_slab; + ubifs_shrinker_info->count_objects = ubifs_shrink_count; + ubifs_shrinker_info->scan_objects = ubifs_shrink_scan; + ubifs_shrinker_info->seeks = DEFAULT_SEEKS; + + shrinker_register(ubifs_shrinker_info); + err = ubifs_compressors_init(); if (err) goto out_shrinker; @@ -2467,7 +2469,7 @@ static int __init ubifs_init(void) dbg_debugfs_exit(); ubifs_compressors_exit(); out_shrinker: - unregister_shrinker(&ubifs_shrinker_info); + shrinker_free(ubifs_shrinker_info); out_slab: kmem_cache_destroy(ubifs_inode_slab); return err; @@ -2483,7 +2485,7 @@ static void __exit ubifs_exit(void) dbg_debugfs_exit(); ubifs_sysfs_exit(); ubifs_compressors_exit(); - unregister_shrinker(&ubifs_shrinker_info); + shrinker_free(ubifs_shrinker_info); /* * Make sure all delayed rcu free inodes are flushed before we From patchwork Mon Aug 7 11:09:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712889 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1987EB64DD for ; Mon, 7 Aug 2023 11:28:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232672AbjHGL2v (ORCPT ); Mon, 7 Aug 2023 07:28:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37134 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232783AbjHGL16 (ORCPT ); Mon, 7 Aug 2023 07:27:58 -0400 Received: from mail-oa1-f50.google.com (mail-oa1-f50.google.com [209.85.160.50]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B4D4524A for ; Mon, 7 Aug 2023 04:24:37 -0700 (PDT) Received: by mail-oa1-f50.google.com with SMTP id 586e51a60fabf-1a2dd615ddcso987493fac.0 for ; Mon, 07 Aug 2023 04:24:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407363; x=1692012163; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=GSWsN00ewH1CUxuL2on0amogNZtYjpfZMPk3tXk1MLc=; b=CHthKJXQO6IC2cHKwXEUh5HiGUa5YRcylovtJUAjmBvOUfw6LSwRqw6QFvdfYNlOe+ 3CKTw2EgBQHg0RaxncvB7Qz25xwEoej7aSuw+E2ek/nV2a36lanS4XNrb8jY66FxmZYM TkSz9weU7MEIChkhdGuuH2hUKxeYcJfBJeEwy5DgUMwPi79g8LEaxilMvGe8s9hniPJE gCkWTj6cN4ff94nQad+VPsTM+z9DuuXODg5iusswOJI62qFJXKHLnopcUVgxBGKoUxn/ TgPs4STlO+hqLPxb9xMVTGppMy9HUF6If/3PlPQZXm35aNgd53BTXaDmrlEwptl/0GgP gl/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407363; x=1692012163; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=GSWsN00ewH1CUxuL2on0amogNZtYjpfZMPk3tXk1MLc=; b=MK+LYPe0oxri7QpfO/3Qrimhl+5d7tFZalc2/a5n3/j6gFFHuLqWhYwXrE5kjY1vQ+ Dkg25mBtk30vmhO9uo6m9u4aAPXitOvldNOlIZpX7je6Y+KNxrdJZRhekfdLXiEdttaY 5ZW9w0yb92ci0ydYX2wdMPug1RaXGDW7X4arj4ZJSHTxV1UV85KhpAToo01zDkHqrrY8 FGaLjSuAa08eniOxfJw2XC0CD3v+zPh9YHzx7NqFq4wV8vvdxhWlhV8auxw1HRvZt+aR XDNH/klxjSwUtJF575xwYo//Fq8D3SYy/LWM0iGW2IMErw0HMukXsGnDQM09gCqbSjHt JK3w== X-Gm-Message-State: ABy/qLaMAbRFVGdVMu0sLl3wiR8xCIdFX/h3e7TYcuy7ztYSpapYh41h Aes/UaceJ/BEqHX3PBtYz0OuyvqsPWagb9+hvwE= X-Google-Smtp-Source: APBJJlEEwhe0wjgrc7nxC5j9G5K3ZI0sWgwDykpBRAx7nLtKV2LZNd6jgA89VvGSaryf9LAeIFxakg== X-Received: by 2002:a17:90a:901:b0:268:3a31:3e4d with SMTP id n1-20020a17090a090100b002683a313e4dmr23070871pjn.2.1691406828996; Mon, 07 Aug 2023 04:13:48 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.13.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:13:48 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 18/48] rcu: dynamically allocate the rcu-lazy shrinker Date: Mon, 7 Aug 2023 19:09:06 +0800 Message-Id: <20230807110936.21819-19-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the rcu-lazy shrinker. Signed-off-by: Qi Zheng --- kernel/rcu/tree_nocb.h | 20 +++++++++++--------- 1 file changed, 11 insertions(+), 9 deletions(-) diff --git a/kernel/rcu/tree_nocb.h b/kernel/rcu/tree_nocb.h index 5598212d1f27..e1c59c33738a 100644 --- a/kernel/rcu/tree_nocb.h +++ b/kernel/rcu/tree_nocb.h @@ -1396,13 +1396,6 @@ lazy_rcu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) return count ? count : SHRINK_STOP; } - -static struct shrinker lazy_rcu_shrinker = { - .count_objects = lazy_rcu_shrink_count, - .scan_objects = lazy_rcu_shrink_scan, - .batch = 0, - .seeks = DEFAULT_SEEKS, -}; #endif // #ifdef CONFIG_RCU_LAZY void __init rcu_init_nohz(void) @@ -1410,6 +1403,7 @@ void __init rcu_init_nohz(void) int cpu; struct rcu_data *rdp; const struct cpumask *cpumask = NULL; + struct shrinker * __maybe_unused lazy_rcu_shrinker; #if defined(CONFIG_NO_HZ_FULL) if (tick_nohz_full_running && !cpumask_empty(tick_nohz_full_mask)) @@ -1436,8 +1430,16 @@ void __init rcu_init_nohz(void) return; #ifdef CONFIG_RCU_LAZY - if (register_shrinker(&lazy_rcu_shrinker, "rcu-lazy")) - pr_err("Failed to register lazy_rcu shrinker!\n"); + lazy_rcu_shrinker = shrinker_alloc(0, "rcu-lazy"); + if (!lazy_rcu_shrinker) { + pr_err("Failed to allocate lazy_rcu shrinker!\n"); + } else { + lazy_rcu_shrinker->count_objects = lazy_rcu_shrink_count; + lazy_rcu_shrinker->scan_objects = lazy_rcu_shrink_scan; + lazy_rcu_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(lazy_rcu_shrinker); + } #endif // #ifdef CONFIG_RCU_LAZY if (!cpumask_subset(rcu_nocb_mask, cpu_possible_mask)) { From patchwork Mon Aug 7 11:09:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712897 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F208C04FE0 for ; Mon, 7 Aug 2023 11:17:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231726AbjHGLRb (ORCPT ); Mon, 7 Aug 2023 07:17:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52408 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232266AbjHGLRN (ORCPT ); Mon, 7 Aug 2023 07:17:13 -0400 Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C127E198D for ; Mon, 7 Aug 2023 04:15:23 -0700 (PDT) Received: by mail-pg1-x529.google.com with SMTP id 41be03b00d2f7-55b5a37acb6so362201a12.0 for ; Mon, 07 Aug 2023 04:15:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406841; x=1692011641; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=a0ijFA9s9bGVMHT4vLgTYS12L8yx2Rc7o6TjM9ZoJx8=; b=j23yTPIuNE+5ql7c6DjTIXWDr8oKTSMtsFBsjjClL+S91jhwZsCcQpsRFgnSFEePMC wDGERQ9BkTMGtvLZ5zfdg/UY3HTRyGts+YmZTXabmNDPI0OPAQAqDfrw+jtLBHzydYmo a162rquUe53dODAJSpyuVfvHf3Ov/M30E8XZRIYttEwAxKqQFIS0/ih88OAzPNYyRzzl 3HkOwk/otVmt9H2o9TgGnt1eeNwmmBoINVdlSrRso11GlktIoEp92Q8ZBNulwW/JkpbE xeEGYB8AYsoVpHQBF7XcqQ5QT7dfjGJtE4RXA0EdlD1H8/kYwDQ1OkZhdkl3HITdo9Iq hOkA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406841; x=1692011641; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=a0ijFA9s9bGVMHT4vLgTYS12L8yx2Rc7o6TjM9ZoJx8=; b=kfmEIf2S/kYUaIGmcKAs29IzaNupc0MP2XZiWszaddO1Wk3OHqbZhUGiY8hkzu6EJr kvyVYXuCi21VbignNj1m+WoxSYM5HvQ89vObt4R21hhHISS7aFo9BBmcj+ILSL5fcGU5 YGLTCruji81cGsRhL6011ibyen7rm52sZ3ZxF8KU2jOpaTd639K2uwDC07w+WFKSCw+G J4cBbcLXFiqtwBEwqoh0Q28sEaAG5Ozn881gaejeuY3Ug1SxtiSNiEqvvxXmHDYj6ESA V80/s+m4CaIRT4dUtRS8KLp8MOiwynIMve9Q420cpOxUZIiyNSnVN7VYQH1x7NnCNfGF pZAA== X-Gm-Message-State: AOJu0YwjkPTqpBd5Uev3cMMXIidBjvfhsaqMXFALNHu8PxwS1hDne9j4 xjrg8g5b+JfUrDMik3CnSj+bEg== X-Google-Smtp-Source: AGHT+IELWLhV4Bj40lkko/D2F7gtSRcHKPclt9k8JlXsq8dyT7OdoG/0VZRRAUzfMJnehzLNwTS/oA== X-Received: by 2002:a17:90a:2909:b0:269:5bf7:d79c with SMTP id g9-20020a17090a290900b002695bf7d79cmr2214416pjd.1.1691406841328; Mon, 07 Aug 2023 04:14:01 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.13.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:14:01 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 19/48] rcu: dynamically allocate the rcu-kfree shrinker Date: Mon, 7 Aug 2023 19:09:07 +0800 Message-Id: <20230807110936.21819-20-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the rcu-kfree shrinker. Signed-off-by: Qi Zheng --- kernel/rcu/tree.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 7c79480bfaa0..3b20fc46c514 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3449,13 +3449,6 @@ kfree_rcu_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) return freed == 0 ? SHRINK_STOP : freed; } -static struct shrinker kfree_rcu_shrinker = { - .count_objects = kfree_rcu_shrink_count, - .scan_objects = kfree_rcu_shrink_scan, - .batch = 0, - .seeks = DEFAULT_SEEKS, -}; - void __init kfree_rcu_scheduler_running(void) { int cpu; @@ -4931,6 +4924,7 @@ static void __init kfree_rcu_batch_init(void) { int cpu; int i, j; + struct shrinker *kfree_rcu_shrinker; /* Clamp it to [0:100] seconds interval. */ if (rcu_delay_page_cache_fill_msec < 0 || @@ -4962,8 +4956,18 @@ static void __init kfree_rcu_batch_init(void) INIT_DELAYED_WORK(&krcp->page_cache_work, fill_page_cache_func); krcp->initialized = true; } - if (register_shrinker(&kfree_rcu_shrinker, "rcu-kfree")) - pr_err("Failed to register kfree_rcu() shrinker!\n"); + + kfree_rcu_shrinker = shrinker_alloc(0, "rcu-kfree"); + if (!kfree_rcu_shrinker) { + pr_err("Failed to allocate kfree_rcu() shrinker!\n"); + return; + } + + kfree_rcu_shrinker->count_objects = kfree_rcu_shrink_count; + kfree_rcu_shrinker->scan_objects = kfree_rcu_shrink_scan; + kfree_rcu_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(kfree_rcu_shrinker); } void __init rcu_init(void) From patchwork Mon Aug 7 11:09:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711222 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52A3BC001DF for ; Mon, 7 Aug 2023 11:31:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232784AbjHGLbF (ORCPT ); Mon, 7 Aug 2023 07:31:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37570 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232598AbjHGLad (ORCPT ); Mon, 7 Aug 2023 07:30:33 -0400 Received: from mail-qk1-x72f.google.com (mail-qk1-x72f.google.com [IPv6:2607:f8b0:4864:20::72f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D22735B6 for ; Mon, 7 Aug 2023 04:27:11 -0700 (PDT) Received: by mail-qk1-x72f.google.com with SMTP id af79cd13be357-76cee0a4b70so19127785a.0 for ; Mon, 07 Aug 2023 04:27:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407583; x=1692012383; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=UfFRGPeE2ZLo8C9JFiR7wWvNCzDdrS4O9P7I0rwozQE=; b=OFl03a0vmrFPq/13GzMB/yLiR6giOLDnbyihc8TThoj9MU0wea8wfcQksauT6ixlOr Lw9p0bgMb//O+SCumnBYZzuNpSMslLQsya8KlwpwqBuTtwXHbR71GJg3DG4zTAaMOk5N C2DkOhAIg2ssfEnOwX8eBvRSRVL76GLXiF7zqnrO7KDreun4X3Im9lLb+MF6AnaPfSvM a5A5a9sgpSKIgcvuWCiyxB88tgLatgQliTMBvEXKYJ0mM4/lHqTQ8jvzA/8DFzHUR5GV VI3jD8FXEIVbQeEbjCtarDWdjvuv6gbTUxoZy/yup48TvEGKutDMoJ1l8asaKKnmiosE JSjA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407583; x=1692012383; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UfFRGPeE2ZLo8C9JFiR7wWvNCzDdrS4O9P7I0rwozQE=; b=eJV3D7hEYf0+gBPHN5SN3Y/BEPFjU+Y7fYm7/DueDx9cAL04kchbLxsYRpSjdrbMxL Qcw7fsisIHQMSR3bblEMzs9GG7fDDDq4XPrTnEs6xKf8DKDulWcMlnZyKD18eZjfBCdD GF4QmmNLWrWJJZRihvg2S9a9Dl2bMUoZc+A25+WEVnnf4bmrAohi+snqAOY4bWajLJdV E3AW3dmrztiUT+MjLVSfUti98qitLOikwZhCZxQeGYyVvFUO/LEiJvc2uSV2sLIZhskz h7/POZW53Ktx2q0I9jlm9EcFDguSbu1J/NbnIbMGMQetNekHQkrt6h+9skZ5nu5ab+4c 9TaA== X-Gm-Message-State: ABy/qLY+HFBpG2/N5NjxjlECSv/10Vu/lpDYDWZf797OA8kwPHT5ElZ4 KQqUmGBpQJYDL0Jy1HJZoFJWV9V6y19obEhI9Z8= X-Google-Smtp-Source: APBJJlFKEuLPG6rXvjHQ/xhYlF3mJA1G+qTCCufEjWmHi053bG2lxjJC7FtDeUsrnl72QxE+YEuj1g== X-Received: by 2002:a17:902:d503:b0:1bb:83ec:832 with SMTP id b3-20020a170902d50300b001bb83ec0832mr32625772plg.2.1691406854020; Mon, 07 Aug 2023 04:14:14 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.14.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:14:13 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 20/48] mm: thp: dynamically allocate the thp-related shrinkers Date: Mon, 7 Aug 2023 19:09:08 +0800 Message-Id: <20230807110936.21819-21-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the thp-zero and thp-deferred_split shrinkers. Signed-off-by: Qi Zheng --- mm/huge_memory.c | 69 +++++++++++++++++++++++++++++++----------------- 1 file changed, 45 insertions(+), 24 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 947001a7cd42..5d0c7a0b651c 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -65,7 +65,11 @@ unsigned long transparent_hugepage_flags __read_mostly = (1<count_objects = shrink_huge_zero_page_count; + huge_zero_page_shrinker->scan_objects = shrink_huge_zero_page_scan; + huge_zero_page_shrinker->seeks = DEFAULT_SEEKS; + shrinker_register(huge_zero_page_shrinker); + + deferred_split_shrinker->count_objects = deferred_split_count; + deferred_split_shrinker->scan_objects = deferred_split_scan; + deferred_split_shrinker->seeks = DEFAULT_SEEKS; + shrinker_register(deferred_split_shrinker); + + return 0; +} + +static void __init thp_shrinker_exit(void) +{ + shrinker_free(huge_zero_page_shrinker); + shrinker_free(deferred_split_shrinker); +} + static int __init hugepage_init(void) { int err; @@ -482,12 +516,9 @@ static int __init hugepage_init(void) if (err) goto err_slab; - err = register_shrinker(&huge_zero_page_shrinker, "thp-zero"); - if (err) - goto err_hzp_shrinker; - err = register_shrinker(&deferred_split_shrinker, "thp-deferred_split"); + err = thp_shrinker_init(); if (err) - goto err_split_shrinker; + goto err_shrinker; /* * By default disable transparent hugepages on smaller systems, @@ -505,10 +536,8 @@ static int __init hugepage_init(void) return 0; err_khugepaged: - unregister_shrinker(&deferred_split_shrinker); -err_split_shrinker: - unregister_shrinker(&huge_zero_page_shrinker); -err_hzp_shrinker: + thp_shrinker_exit(); +err_shrinker: khugepaged_destroy(); err_slab: hugepage_exit_sysfs(hugepage_kobj); @@ -2834,7 +2863,7 @@ void deferred_split_folio(struct folio *folio) #ifdef CONFIG_MEMCG if (memcg) set_shrinker_bit(memcg, folio_nid(folio), - deferred_split_shrinker.id); + deferred_split_shrinker->id); #endif } spin_unlock_irqrestore(&ds_queue->split_queue_lock, flags); @@ -2908,14 +2937,6 @@ static unsigned long deferred_split_scan(struct shrinker *shrink, return split; } -static struct shrinker deferred_split_shrinker = { - .count_objects = deferred_split_count, - .scan_objects = deferred_split_scan, - .seeks = DEFAULT_SEEKS, - .flags = SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE | - SHRINKER_NONSLAB, -}; - #ifdef CONFIG_DEBUG_FS static void split_huge_pages_all(void) { From patchwork Mon Aug 7 11:09:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712886 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F270C001DF for ; Mon, 7 Aug 2023 11:32:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232770AbjHGLcG (ORCPT ); Mon, 7 Aug 2023 07:32:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40672 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232670AbjHGLbz (ORCPT ); Mon, 7 Aug 2023 07:31:55 -0400 Received: from mail-ot1-x336.google.com (mail-ot1-x336.google.com [IPv6:2607:f8b0:4864:20::336]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D599A59D8 for ; Mon, 7 Aug 2023 04:29:11 -0700 (PDT) Received: by mail-ot1-x336.google.com with SMTP id 46e09a7af769-6bc57401cb9so701574a34.0 for ; Mon, 07 Aug 2023 04:29:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407689; x=1692012489; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=igblsYgdIrcTAL0swCZj529c9jjsKo5CwfFS1Qcng2s=; b=A+glrI1ccbxsbCjEId2f1ulLa6Q51yjQTjyggQx8eT31cFTOUaSrWm9Ifj+54Zd/qm B5eNjkF9kumntybmHbM0A3qud0Ikqw1IxzC1U7kJm3jLue+jzFf1zeZyRbx4zB9mjChz emNQh75R8T1AAn79yMBrHd2iOj3WmUG3HR+bqnwPmnAQfzgJvkBR89BDfsAPGv2baOSW 6gAuZ13rDDZFeXEKXbj5Ln/RPups4ASkIFIM8UfTczEdTB60mIEMdUIbN8OJ8YIC4fZc RZdcOFOkBs5qYYZtt1MqSwMybM8d9M10Y2SewPurB6MkNwE4RZYFORcXDjzE7OWtGbOn yqnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407689; x=1692012489; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=igblsYgdIrcTAL0swCZj529c9jjsKo5CwfFS1Qcng2s=; b=MwrHWLHRQiAoDOQmPywLPe5cOV+Xo3kWwEMzkQB9PqX24mqTnZFv6YYwCM15WrvuNz IfNChjcL1kJiH2ElE+acXHS3+/pPwYMfNuGH8TOLxALoGq3LUPXIjguau1jZNxy1a48H B0Cjsvtqanffdta3SbbEyzC0iwBA2N/3WFzpEC3V3SY5nTOb9CEmjQUcrnIxrJC3XuTI m2VqeSznbANef6Afh0tHjSM5O/JQrLZJ6ae9WTSYObLXXPDJPragf2JKIFT3su5CFqUV EENUvXCvnOigK9Mi8d0neQINiBmW4xHkEQHTmD+PGPuR+6O4u55EW5DaY3cTgv7CquC5 tgBg== X-Gm-Message-State: ABy/qLYXycAJRYl4K1Wtb7jisIl7RHMB4B6zoxfdX4Dgdk3S0GynkuY1 v8yRN1XHbdQ5eCdAHnH93jtGJHuDtH4A/pBte84= X-Google-Smtp-Source: APBJJlGEDKqK4nyUWs8xE2EOJL+ODt25deDnA1/u8sHRAURqC7uD6bjxMDwwed+SXn6y84Un7sE7wA== X-Received: by 2002:a17:90a:1090:b0:268:126c:8a8b with SMTP id c16-20020a17090a109000b00268126c8a8bmr24570134pja.3.1691406867003; Mon, 07 Aug 2023 04:14:27 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.14.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:14:26 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 21/48] sunrpc: dynamically allocate the sunrpc_cred shrinker Date: Mon, 7 Aug 2023 19:09:09 +0800 Message-Id: <20230807110936.21819-22-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the sunrpc_cred shrinker. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- net/sunrpc/auth.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c index 2f16f9d17966..0cc52e39f859 100644 --- a/net/sunrpc/auth.c +++ b/net/sunrpc/auth.c @@ -861,11 +861,7 @@ rpcauth_uptodatecred(struct rpc_task *task) test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0; } -static struct shrinker rpc_cred_shrinker = { - .count_objects = rpcauth_cache_shrink_count, - .scan_objects = rpcauth_cache_shrink_scan, - .seeks = DEFAULT_SEEKS, -}; +static struct shrinker *rpc_cred_shrinker; int __init rpcauth_init_module(void) { @@ -874,9 +870,18 @@ int __init rpcauth_init_module(void) err = rpc_init_authunix(); if (err < 0) goto out1; - err = register_shrinker(&rpc_cred_shrinker, "sunrpc_cred"); - if (err < 0) + rpc_cred_shrinker = shrinker_alloc(0, "sunrpc_cred"); + if (!rpc_cred_shrinker) { + err = -ENOMEM; goto out2; + } + + rpc_cred_shrinker->count_objects = rpcauth_cache_shrink_count; + rpc_cred_shrinker->scan_objects = rpcauth_cache_shrink_scan; + rpc_cred_shrinker->seeks = DEFAULT_SEEKS; + + shrinker_register(rpc_cred_shrinker); + return 0; out2: rpc_destroy_authunix(); @@ -887,5 +892,5 @@ int __init rpcauth_init_module(void) void rpcauth_remove_module(void) { rpc_destroy_authunix(); - unregister_shrinker(&rpc_cred_shrinker); + shrinker_free(rpc_cred_shrinker); } From patchwork Mon Aug 7 11:09:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712885 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 04A94C04A6A for ; Mon, 7 Aug 2023 11:34:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233033AbjHGLe3 (ORCPT ); Mon, 7 Aug 2023 07:34:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41206 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232580AbjHGLdn (ORCPT ); Mon, 7 Aug 2023 07:33:43 -0400 Received: from mail-oi1-x22f.google.com (mail-oi1-x22f.google.com [IPv6:2607:f8b0:4864:20::22f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6CBEF3C34 for ; Mon, 7 Aug 2023 04:30:43 -0700 (PDT) Received: by mail-oi1-x22f.google.com with SMTP id 5614622812f47-3a7065d0f32so482209b6e.1 for ; Mon, 07 Aug 2023 04:30:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407789; x=1692012589; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=uDu/4z0sff3MNLq2Hem41DvJLtW9HR7Ht2OY0+o3IBw=; b=DEUIMThJjSCYxwqfiYRyfQAA02vIsL97+KUjupT0fNUi08L935T6o/p+AiTAkwp2H8 dVKxVvTcd61j3aBqemF6b8oHfRCPCI9AQVPgLYsPsqN71u5ocgl8uIw8I97MuO4PuJ50 r97zILJqgeDcbt+d4eKkocF21RN3c3cZV1jb3x4qSUAjwiz9pax8YqCfJ0p51pfqKMey ZooDx8YjUX5EXYPopnhWkNw2plGSfsWk5O3f9hB3WqVPGT20sElAe8p1KMbBKvBakCmK dbr/oT/iN+1qYYwe/CTy4R3IB1qZa5nqwIn1UX5E9djj/ziEM92+u+O2M8Qy6EzhFDkl lSEw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407789; x=1692012589; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=uDu/4z0sff3MNLq2Hem41DvJLtW9HR7Ht2OY0+o3IBw=; b=MLdqZ5dY+2+PImyjS1kTCV7tfhBsSbGScO1mf2CojZkLXgepbCrB6bQO3nQ+1+7aPY IFkAVRf+AG6Z48nU8J2Aei6xfxocuGqQogdylRi8P5WowZekFJT5hZ/NuWtOI5cAbIkL nPSu6GCWMbUobbqWwYNfaOVv5ePI4LEseGKYbdU3XALwxHWwCs5THqFL5xGoPmwjDZpp NLzzX6pmOCadjTfbwHwG/lXuh9mOKg+eHUPRibIb5Eig2c9blj5tbi/HaJMT0CsXj/rO rCAyAxSkBEorxBlRjTwe1XhTNRPWuOGMTpxgKC1euaikmHmMlWVLvhoIQJ9eMSWpRGsf kK7g== X-Gm-Message-State: AOJu0Yyzy9Snra//6vSChHG68KNpvgP8eBJMPtUcXIGnoykF12/r+D8a xPbk2AyL/5EFrbyExu5cWfNXsGwTY0OjmobU5Fs= X-Google-Smtp-Source: APBJJlE+JUQU2KnCMqxKRhVbnyE7g/MjXwiwJL23ihCwbN9GtK/yS0Snkx/m2fq2fyEzRCC+VQ52VA== X-Received: by 2002:a17:90a:1f83:b0:268:3dc6:f0c5 with SMTP id x3-20020a17090a1f8300b002683dc6f0c5mr25034377pja.0.1691406879873; Mon, 07 Aug 2023 04:14:39 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.14.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:14:39 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 22/48] mm: workingset: dynamically allocate the mm-shadow shrinker Date: Mon, 7 Aug 2023 19:09:10 +0800 Message-Id: <20230807110936.21819-23-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Use new APIs to dynamically allocate the mm-shadow shrinker. Signed-off-by: Qi Zheng --- mm/workingset.c | 27 ++++++++++++++------------- 1 file changed, 14 insertions(+), 13 deletions(-) diff --git a/mm/workingset.c b/mm/workingset.c index da58a26d0d4d..3c53138903a7 100644 --- a/mm/workingset.c +++ b/mm/workingset.c @@ -763,13 +763,6 @@ static unsigned long scan_shadow_nodes(struct shrinker *shrinker, NULL); } -static struct shrinker workingset_shadow_shrinker = { - .count_objects = count_shadow_nodes, - .scan_objects = scan_shadow_nodes, - .seeks = 0, /* ->count reports only fully expendable nodes */ - .flags = SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE, -}; - /* * Our list_lru->lock is IRQ-safe as it nests inside the IRQ-safe * i_pages lock. @@ -778,9 +771,10 @@ static struct lock_class_key shadow_nodes_key; static int __init workingset_init(void) { + struct shrinker *workingset_shadow_shrinker; unsigned int timestamp_bits; unsigned int max_order; - int ret; + int ret = -ENOMEM; BUILD_BUG_ON(BITS_PER_LONG < EVICTION_SHIFT); /* @@ -797,17 +791,24 @@ static int __init workingset_init(void) pr_info("workingset: timestamp_bits=%d max_order=%d bucket_order=%u\n", timestamp_bits, max_order, bucket_order); - ret = prealloc_shrinker(&workingset_shadow_shrinker, "mm-shadow"); - if (ret) + workingset_shadow_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE | + SHRINKER_MEMCG_AWARE, + "mm-shadow"); + if (!workingset_shadow_shrinker) goto err; + ret = __list_lru_init(&shadow_nodes, true, &shadow_nodes_key, - &workingset_shadow_shrinker); + workingset_shadow_shrinker); if (ret) goto err_list_lru; - register_shrinker_prepared(&workingset_shadow_shrinker); + + workingset_shadow_shrinker->count_objects = count_shadow_nodes; + workingset_shadow_shrinker->scan_objects = scan_shadow_nodes; + + shrinker_register(workingset_shadow_shrinker); return 0; err_list_lru: - free_prealloced_shrinker(&workingset_shadow_shrinker); + shrinker_free(workingset_shadow_shrinker); err: return ret; } From patchwork Mon Aug 7 11:09:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712887 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 469AEC04A6A for ; Mon, 7 Aug 2023 11:30:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232800AbjHGLaU (ORCPT ); Mon, 7 Aug 2023 07:30:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232483AbjHGLaG (ORCPT ); Mon, 7 Aug 2023 07:30:06 -0400 Received: from mail-qk1-f174.google.com (mail-qk1-f174.google.com [209.85.222.174]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 103252D7B for ; Mon, 7 Aug 2023 04:26:56 -0700 (PDT) Received: by mail-qk1-f174.google.com with SMTP id af79cd13be357-76cf9cf65feso24121185a.0 for ; Mon, 07 Aug 2023 04:26:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407471; x=1692012271; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=41xmtjHXWdMgLIKiQIRlxv7trVO9ZOyoGRN9dVMIVRc=; b=UU5gOtHZ6m/6F5lQ/AoNrL2ABarbS8h52OEhueSrOGGA/ryjcshhKOriq8LRpgT1Vv xnCNvEUs1gIwuO8P2cX4plWib+3vkSLadH5xMv/51YhkMtRkE0MLHryPJ91Y86V2cRfB e9hE8fUkW9RHzsASAqzsBOsNYW+IIPDJQOoFZTc7eMO4/Y9w4gd4Y9a24Fdxg9bbIPa+ ZdnYimtcDYTOy+SxvmYYExEMJnodTDJZNA6nirdx6hM1QtaEUVOcscZf0lPBZ90C6Ia9 v3QHT6ehuBaS9a6bO+3PaDxvdpp6469rO1IKyUsVdgdMzjJHHXCc7RFRBxq52pFOchNI xD9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407471; x=1692012271; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=41xmtjHXWdMgLIKiQIRlxv7trVO9ZOyoGRN9dVMIVRc=; b=NOKdmzJjLZBJ4VuTaD38rovdcLjlY6NITuppg4LjF0T3Mlxp8RFzayJkzKCAJQtvuo WnEbIyln+sFzH0c+oULcQDG/fc2VBV7+wwi8Xp0rx+97VQu/UENE5xxTlnYS0Iykmriz wFpEmVyigl2YgBg4smEWgJ/8lnTkMWuRx6ZoqSU1uvT5mPU0EbL++qzQ9Cwuk14eQJp9 BEwbey5cGzugjFINMInjxzYpYNX9+RDrbundmibnKqmw3BCVvuHBqTYYmlIPfAQ39ZRT X+KzACIeX1OXyMswC0OPpeEhViNlNF9z00EgpgqTFr/gtN2QwPeYktRooTOCG2OR6xFh tkwQ== X-Gm-Message-State: ABy/qLaIgwHyCgy/NVvhO/YzfGuBpgGAl42yyBMuer04HFnJzZO2hHXQ Nt626+Nmfz4tmHqeMzyb09GUKTu4yugAPuSxlQA= X-Google-Smtp-Source: AGHT+IHGYi4H3eJU6+xZDF9BksA4+I5hA9Bl5pPgRuSaTGIaReiVuXjmY2IFcPrIIfpO+IdhjanDJQ== X-Received: by 2002:a17:90a:9c3:b0:269:41cf:7212 with SMTP id 61-20020a17090a09c300b0026941cf7212mr4963504pjo.4.1691406892562; Mon, 07 Aug 2023 04:14:52 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.14.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:14:52 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 23/48] drm/i915: dynamically allocate the i915_gem_mm shrinker Date: Mon, 7 Aug 2023 19:09:11 +0800 Message-Id: <20230807110936.21819-24-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the i915_gem_mm shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct drm_i915_private. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/gpu/drm/i915/gem/i915_gem_shrinker.c | 30 +++++++++++--------- drivers/gpu/drm/i915/i915_drv.h | 2 +- 2 files changed, 18 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c index 214763942aa2..4504eb4f31d5 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c @@ -284,8 +284,7 @@ unsigned long i915_gem_shrink_all(struct drm_i915_private *i915) static unsigned long i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { - struct drm_i915_private *i915 = - container_of(shrinker, struct drm_i915_private, mm.shrinker); + struct drm_i915_private *i915 = shrinker->private_data; unsigned long num_objects; unsigned long count; @@ -302,8 +301,8 @@ i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) if (num_objects) { unsigned long avg = 2 * count / num_objects; - i915->mm.shrinker.batch = - max((i915->mm.shrinker.batch + avg) >> 1, + i915->mm.shrinker->batch = + max((i915->mm.shrinker->batch + avg) >> 1, 128ul /* default SHRINK_BATCH */); } @@ -313,8 +312,7 @@ i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) static unsigned long i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { - struct drm_i915_private *i915 = - container_of(shrinker, struct drm_i915_private, mm.shrinker); + struct drm_i915_private *i915 = shrinker->private_data; unsigned long freed; sc->nr_scanned = 0; @@ -422,12 +420,18 @@ i915_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr void i915_gem_driver_register__shrinker(struct drm_i915_private *i915) { - i915->mm.shrinker.scan_objects = i915_gem_shrinker_scan; - i915->mm.shrinker.count_objects = i915_gem_shrinker_count; - i915->mm.shrinker.seeks = DEFAULT_SEEKS; - i915->mm.shrinker.batch = 4096; - drm_WARN_ON(&i915->drm, register_shrinker(&i915->mm.shrinker, - "drm-i915_gem")); + i915->mm.shrinker = shrinker_alloc(0, "drm-i915_gem"); + if (!i915->mm.shrinker) { + drm_WARN_ON(&i915->drm, 1); + } else { + i915->mm.shrinker->scan_objects = i915_gem_shrinker_scan; + i915->mm.shrinker->count_objects = i915_gem_shrinker_count; + i915->mm.shrinker->seeks = DEFAULT_SEEKS; + i915->mm.shrinker->batch = 4096; + i915->mm.shrinker->private_data = i915; + + shrinker_register(i915->mm.shrinker); + } i915->mm.oom_notifier.notifier_call = i915_gem_shrinker_oom; drm_WARN_ON(&i915->drm, register_oom_notifier(&i915->mm.oom_notifier)); @@ -443,7 +447,7 @@ void i915_gem_driver_unregister__shrinker(struct drm_i915_private *i915) unregister_vmap_purge_notifier(&i915->mm.vmap_notifier)); drm_WARN_ON(&i915->drm, unregister_oom_notifier(&i915->mm.oom_notifier)); - unregister_shrinker(&i915->mm.shrinker); + shrinker_free(i915->mm.shrinker); } void i915_gem_shrinker_taints_mutex(struct drm_i915_private *i915, diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 682ef2b5c7d5..389e8bf140d7 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -163,7 +163,7 @@ struct i915_gem_mm { struct notifier_block oom_notifier; struct notifier_block vmap_notifier; - struct shrinker shrinker; + struct shrinker *shrinker; #ifdef CONFIG_MMU_NOTIFIER /** From patchwork Mon Aug 7 11:09:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712892 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80493C07E8F for ; Mon, 7 Aug 2023 11:24:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232455AbjHGLYC (ORCPT ); Mon, 7 Aug 2023 07:24:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232816AbjHGLX2 (ORCPT ); Mon, 7 Aug 2023 07:23:28 -0400 Received: from mail-pg1-f170.google.com (mail-pg1-f170.google.com [209.85.215.170]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 27DD130FE for ; Mon, 7 Aug 2023 04:21:09 -0700 (PDT) Received: by mail-pg1-f170.google.com with SMTP id 41be03b00d2f7-56462258cdeso526287a12.1 for ; Mon, 07 Aug 2023 04:21:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406905; x=1692011705; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Tu9w5C30y8MI/napZavPwFZ6nIJBEFlaB1CCEG9BfCw=; b=a1z4YhZHvqFoPORrF+lPhY3j/XjC+TmNlvpRZtfYsAqK97Oj+7/3ynKuNED1mH7m1Z 6e06VRzbid9nZWrrMcucwcQQbl3wWoXnyMdc8ZAlXCmo2cCjWRY3iHx4TeC9QHkfs0aM d8RS7FugZHSZy2lCqTJeQn9s7jGIX4/E3wPsaz9+SXihbEJvHaKoo3rxKtwLTkFE7bEU BQoGy+vR8UkI3yNn8zdn5buykCB5rpkHr/BUOTCuwQKNihZsP/3d1GH/pY3/5pZuhseK T4uD+LwrMEDhqbcy3e5z3ztow6Tvzy0xPmsoxdy/BtYqGaCEBDHXu6qpNBRWJ+H1UeBT R1aw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406905; x=1692011705; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Tu9w5C30y8MI/napZavPwFZ6nIJBEFlaB1CCEG9BfCw=; b=gQ4JBtYPROf9lLKKzdOwL3npsG15bYFHcbbVRCvmAP3XsIj3v4WxPCpAfdzjABYPaD c1uZMGSVAzg4rASQb9btjKY4pGdwyK4URtnPNXgf6Rmb6sCNsETufdPHgNpt0VQ1GlRb YobQ04Xpu9lsHAH3dUKGno0ZkF57aRKvQDOdUtWWF8TR1iGK7X1BAzDgH/O1s/KQKHmm QSyz1Ee+H0vZrCsBURVKMj/J7n2YkHTt44rQ23AETH4jKeKL/mlS1rf+whl++OODCQ0X vUF1O5CK8dAsNuQQhnGHfNn3cnTwj/fCxfd0cz2mL5JbWSymgKBa7c5Cndy9Hhx3VxtS nLQA== X-Gm-Message-State: AOJu0Ywumopgjfjrx6Y1zv1y0jJ+HLNxZM7Vmz2ioD0a81oUZaG6f7FM SmVq4DAlay16kkKhFHNicqD4Kw== X-Google-Smtp-Source: AGHT+IEpCcigBA86rq7g8CBmKfvn4KajAK33DI3WvO1RysFov39NnZyAmCT+CDGKi31ZOdqYdEGlDQ== X-Received: by 2002:a17:90a:c8d:b0:268:196f:9656 with SMTP id v13-20020a17090a0c8d00b00268196f9656mr12996964pja.1.1691406905372; Mon, 07 Aug 2023 04:15:05 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.14.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:15:04 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 24/48] drm/msm: dynamically allocate the drm-msm_gem shrinker Date: Mon, 7 Aug 2023 19:09:12 +0800 Message-Id: <20230807110936.21819-25-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the drm-msm_gem shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct msm_drm_private. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/gpu/drm/msm/msm_drv.c | 4 ++- drivers/gpu/drm/msm/msm_drv.h | 4 +-- drivers/gpu/drm/msm/msm_gem_shrinker.c | 34 ++++++++++++++++---------- 3 files changed, 26 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 4bd028fa7500..7f20249d6071 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -462,7 +462,9 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv) if (ret) goto err_msm_uninit; - msm_gem_shrinker_init(ddev); + ret = msm_gem_shrinker_init(ddev); + if (ret) + goto err_msm_uninit; if (priv->kms_init) { ret = priv->kms_init(ddev); diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 02fd6c7d0bb7..e2fc56f161b5 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -221,7 +221,7 @@ struct msm_drm_private { } vram; struct notifier_block vmap_notifier; - struct shrinker shrinker; + struct shrinker *shrinker; struct drm_atomic_state *pm_state; @@ -283,7 +283,7 @@ int msm_ioctl_gem_submit(struct drm_device *dev, void *data, unsigned long msm_gem_shrinker_shrink(struct drm_device *dev, unsigned long nr_to_scan); #endif -void msm_gem_shrinker_init(struct drm_device *dev); +int msm_gem_shrinker_init(struct drm_device *dev); void msm_gem_shrinker_cleanup(struct drm_device *dev); struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj); diff --git a/drivers/gpu/drm/msm/msm_gem_shrinker.c b/drivers/gpu/drm/msm/msm_gem_shrinker.c index f38296ad8743..20699993e4f8 100644 --- a/drivers/gpu/drm/msm/msm_gem_shrinker.c +++ b/drivers/gpu/drm/msm/msm_gem_shrinker.c @@ -34,8 +34,7 @@ static bool can_block(struct shrink_control *sc) static unsigned long msm_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { - struct msm_drm_private *priv = - container_of(shrinker, struct msm_drm_private, shrinker); + struct msm_drm_private *priv = shrinker->private_data; unsigned count = priv->lru.dontneed.count; if (can_swap()) @@ -100,8 +99,7 @@ active_evict(struct drm_gem_object *obj) static unsigned long msm_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { - struct msm_drm_private *priv = - container_of(shrinker, struct msm_drm_private, shrinker); + struct msm_drm_private *priv = shrinker->private_data; struct { struct drm_gem_lru *lru; bool (*shrink)(struct drm_gem_object *obj); @@ -148,10 +146,11 @@ msm_gem_shrinker_shrink(struct drm_device *dev, unsigned long nr_to_scan) struct shrink_control sc = { .nr_to_scan = nr_to_scan, }; - int ret; + unsigned long ret = SHRINK_STOP; fs_reclaim_acquire(GFP_KERNEL); - ret = msm_gem_shrinker_scan(&priv->shrinker, &sc); + if (priv->shrinker) + ret = msm_gem_shrinker_scan(priv->shrinker, &sc); fs_reclaim_release(GFP_KERNEL); return ret; @@ -210,16 +209,25 @@ msm_gem_shrinker_vmap(struct notifier_block *nb, unsigned long event, void *ptr) * * This function registers and sets up the msm shrinker. */ -void msm_gem_shrinker_init(struct drm_device *dev) +int msm_gem_shrinker_init(struct drm_device *dev) { struct msm_drm_private *priv = dev->dev_private; - priv->shrinker.count_objects = msm_gem_shrinker_count; - priv->shrinker.scan_objects = msm_gem_shrinker_scan; - priv->shrinker.seeks = DEFAULT_SEEKS; - WARN_ON(register_shrinker(&priv->shrinker, "drm-msm_gem")); + + priv->shrinker = shrinker_alloc(0, "drm-msm_gem"); + if (!priv->shrinker) + return -ENOMEM; + + priv->shrinker->count_objects = msm_gem_shrinker_count; + priv->shrinker->scan_objects = msm_gem_shrinker_scan; + priv->shrinker->seeks = DEFAULT_SEEKS; + priv->shrinker->private_data = priv; + + shrinker_register(priv->shrinker); priv->vmap_notifier.notifier_call = msm_gem_shrinker_vmap; WARN_ON(register_vmap_purge_notifier(&priv->vmap_notifier)); + + return 0; } /** @@ -232,8 +240,8 @@ void msm_gem_shrinker_cleanup(struct drm_device *dev) { struct msm_drm_private *priv = dev->dev_private; - if (priv->shrinker.nr_deferred) { + if (priv->shrinker) { WARN_ON(unregister_vmap_purge_notifier(&priv->vmap_notifier)); - unregister_shrinker(&priv->shrinker); + shrinker_free(priv->shrinker); } } From patchwork Mon Aug 7 11:09:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711224 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E5501C001DF for ; Mon, 7 Aug 2023 11:29:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232435AbjHGL3A (ORCPT ); Mon, 7 Aug 2023 07:29:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37162 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233231AbjHGL2l (ORCPT ); Mon, 7 Aug 2023 07:28:41 -0400 Received: from mail-oa1-x34.google.com (mail-oa1-x34.google.com [IPv6:2001:4860:4864:20::34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A97AF5FD2 for ; Mon, 7 Aug 2023 04:25:32 -0700 (PDT) Received: by mail-oa1-x34.google.com with SMTP id 586e51a60fabf-1bb3df62b34so509264fac.0 for ; Mon, 07 Aug 2023 04:25:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407460; x=1692012260; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=vjqO/ZPr/Go39gpx6DVg0WzFepitwPif37hI1XuxbyE=; b=SM7TdlqpTELeAQVR9qfgc0yQ42gt774Mku+jfhGqUjUd/5sqnkoihLwqVMY9/H98Aa +1mcODLszjcUzXGOYozJKgN6//o1bkjYKTpq6kTNKbgtxEH5WCc7tx2xWDxpdu79vmGC BkI9xBObKJWCCWhgnq53wScLjsATi+gWrrOcO4ygnxzveepq/jcqjmQaMimBD64Em9xN se3nnisAlusRSv/w01GwcC4NVbEOyJ4zON4k2TNgktX+Tvif5rOwaiaq+bJudCNV1iln nomPw8txT530Yz8P7wQ2bndSu/GWZBi7ZWs/TNoxoTxr+6WqL2nDmUwYpFV+KKfE97J2 /qTg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407460; x=1692012260; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=vjqO/ZPr/Go39gpx6DVg0WzFepitwPif37hI1XuxbyE=; b=C8C2A/5ZHuwoxUYPONQFm5/sH6HfUC6LdBWnlCNSS6DwTdA1h3jZXqbdy0VeGt07M/ U9uirjzcC/xOwp3C+bA/6xWd22IlSLy4D6vSpZsLrt8/I1IXk0xFcqGaupIW+A4LA0sP op13hB7LgWmGx4ECZKULQse+AyecAnes+dWBCM+2rzBvOxvlAB5Vq7PlKTS0I71Ju3i2 LrZPFcvASVx30WNdXU/qo6q/yOqWlLbeUoQUsyInYekChPFrA7/vj7+HaZqdU8xTZPTO B6F6j7s1GuOTiTwTpY5JhIyXdZgGf4cpTpL9mGs0oq4KUnm0fQ0GRGWLHCjnChFoOgNZ 6wBA== X-Gm-Message-State: ABy/qLYmgdyek/f09WQjy5tDNFYeAUmhLfnzygUfTRnp09qSfX9Rz00e ZoXb+A1ck1jW5qyEKfo9lZqNKQilnj+nWnMNpO8= X-Google-Smtp-Source: APBJJlGmDPkOqvUzYBlbH7T7lkG5BB9heuLk9VUuk/u1AhmT0DHlhAEqotepcvwe4m42tykQjmW6CA== X-Received: by 2002:a17:90a:4104:b0:25c:1ad3:a4a1 with SMTP id u4-20020a17090a410400b0025c1ad3a4a1mr24597319pjf.1.1691406917979; Mon, 07 Aug 2023 04:15:17 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.15.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:15:17 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 25/48] drm/panfrost: dynamically allocate the drm-panfrost shrinker Date: Mon, 7 Aug 2023 19:09:13 +0800 Message-Id: <20230807110936.21819-26-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the drm-panfrost shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct panfrost_device. Signed-off-by: Qi Zheng Reviewed-by: Steven Price --- drivers/gpu/drm/panfrost/panfrost_device.h | 2 +- drivers/gpu/drm/panfrost/panfrost_drv.c | 6 +++- drivers/gpu/drm/panfrost/panfrost_gem.h | 2 +- .../gpu/drm/panfrost/panfrost_gem_shrinker.c | 30 +++++++++++-------- 4 files changed, 25 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index b0126b9fbadc..e667e5689353 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -118,7 +118,7 @@ struct panfrost_device { struct mutex shrinker_lock; struct list_head shrinker_list; - struct shrinker shrinker; + struct shrinker *shrinker; struct panfrost_devfreq pfdevfreq; }; diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index a2ab99698ca8..e1d0e3a23757 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -601,10 +601,14 @@ static int panfrost_probe(struct platform_device *pdev) if (err < 0) goto err_out1; - panfrost_gem_shrinker_init(ddev); + err = panfrost_gem_shrinker_init(ddev); + if (err) + goto err_out2; return 0; +err_out2: + drm_dev_unregister(ddev); err_out1: pm_runtime_disable(pfdev->dev); panfrost_device_fini(pfdev); diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.h b/drivers/gpu/drm/panfrost/panfrost_gem.h index ad2877eeeccd..863d2ec8d4f0 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.h +++ b/drivers/gpu/drm/panfrost/panfrost_gem.h @@ -81,7 +81,7 @@ panfrost_gem_mapping_get(struct panfrost_gem_object *bo, void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping); void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo); -void panfrost_gem_shrinker_init(struct drm_device *dev); +int panfrost_gem_shrinker_init(struct drm_device *dev); void panfrost_gem_shrinker_cleanup(struct drm_device *dev); #endif /* __PANFROST_GEM_H__ */ diff --git a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c index 6a71a2555f85..3dfe2b7ccdd9 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c +++ b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c @@ -18,8 +18,7 @@ static unsigned long panfrost_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { - struct panfrost_device *pfdev = - container_of(shrinker, struct panfrost_device, shrinker); + struct panfrost_device *pfdev = shrinker->private_data; struct drm_gem_shmem_object *shmem; unsigned long count = 0; @@ -65,8 +64,7 @@ static bool panfrost_gem_purge(struct drm_gem_object *obj) static unsigned long panfrost_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { - struct panfrost_device *pfdev = - container_of(shrinker, struct panfrost_device, shrinker); + struct panfrost_device *pfdev = shrinker->private_data; struct drm_gem_shmem_object *shmem, *tmp; unsigned long freed = 0; @@ -97,13 +95,22 @@ panfrost_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) * * This function registers and sets up the panfrost shrinker. */ -void panfrost_gem_shrinker_init(struct drm_device *dev) +int panfrost_gem_shrinker_init(struct drm_device *dev) { struct panfrost_device *pfdev = dev->dev_private; - pfdev->shrinker.count_objects = panfrost_gem_shrinker_count; - pfdev->shrinker.scan_objects = panfrost_gem_shrinker_scan; - pfdev->shrinker.seeks = DEFAULT_SEEKS; - WARN_ON(register_shrinker(&pfdev->shrinker, "drm-panfrost")); + + pfdev->shrinker = shrinker_alloc(0, "drm-panfrost"); + if (!pfdev->shrinker) + return -ENOMEM; + + pfdev->shrinker->count_objects = panfrost_gem_shrinker_count; + pfdev->shrinker->scan_objects = panfrost_gem_shrinker_scan; + pfdev->shrinker->seeks = DEFAULT_SEEKS; + pfdev->shrinker->private_data = pfdev; + + shrinker_register(pfdev->shrinker); + + return 0; } /** @@ -116,7 +123,6 @@ void panfrost_gem_shrinker_cleanup(struct drm_device *dev) { struct panfrost_device *pfdev = dev->dev_private; - if (pfdev->shrinker.nr_deferred) { - unregister_shrinker(&pfdev->shrinker); - } + if (pfdev->shrinker) + shrinker_free(pfdev->shrinker); } From patchwork Mon Aug 7 11:09:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712888 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DC71BC001B0 for ; Mon, 7 Aug 2023 11:29:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232750AbjHGL3q (ORCPT ); Mon, 7 Aug 2023 07:29:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37338 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232600AbjHGL3e (ORCPT ); Mon, 7 Aug 2023 07:29:34 -0400 Received: from mail-io1-xd2c.google.com (mail-io1-xd2c.google.com [IPv6:2607:f8b0:4864:20::d2c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D72D84200 for ; Mon, 7 Aug 2023 04:26:33 -0700 (PDT) Received: by mail-io1-xd2c.google.com with SMTP id ca18e2360f4ac-760dff4b701so48731939f.0 for ; Mon, 07 Aug 2023 04:26:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407529; x=1692012329; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=8Rfav5Nxe+GtybemfHCRLQWJ1Wm1Jr8phC3oTaQ6f/s=; b=SkG+tB88ok33bQKd1c8X+IhCT8Q2xsAk3bzoYwjtPMPSw3rC7dv9SvKULCLLhbkTWN 1Gr9El6VcUFPSwJIlRai0+1JdEJuvuqr8wsyo+9/g0SWAUZIlCnb43XsIojH7V/730k8 HZ/oE29UPYaMULhicAyfTajlS9CJIybmtY2iVbELkJFLmLDxT1vv5z+tRBpSfurlwyyn 1UJ7GtmNwxzNjScpcZVNYW98XxsD4Jy5IogGfr+PvT92+yzryqszsKrv+nW8+RUwcjQD idXcFMEGqr+OtF0AyMW4rDRbqrZKLI5q8jiybS7frfRWCpUH/LUPDFEMXbbToETSO1Zc fsfA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407529; x=1692012329; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=8Rfav5Nxe+GtybemfHCRLQWJ1Wm1Jr8phC3oTaQ6f/s=; b=Ko3pvIiMmUu69D9apAlzxvnxvksfD/AEVQYZdJ/hWRAON2EStrmTv03OnJkS2D9ozj Wst+Hny34RShjMTqJtFJJbk3GiY8bIulqB1Ag1KlSSJF4lDJ6EV9S815btzTSUyzm3/+ E7WsFWmz1mUCP3Uw7jLVTOYP1CEbJN8mRiTlJOu8/03chbQ7baPLnSvC8zwo987rT/ck yJLS6MCERq5yZxmn6R1MA+oYJv/2WrJzIGRGfxlZfD4AeK2kf66xDHbf1x5t9Uqp5sth uj2nxOWQ4WFtUuUkpPXmxskyNDFTDqPJtwf5iWhMoEUHHnSAm/pVdC6pDoRP2cIGIivp +CNw== X-Gm-Message-State: ABy/qLZzHnSdf1/xgPRLM+Cp2oYxMyaSeP4w7zbBJZmZhT+P9qop9o4p 8UkdwpSKoroBFPENgzNC1ddl+mDL1z/IJZmp1x4= X-Google-Smtp-Source: AGHT+IFWvaKty2qg3Zp4xukmaRzjC+XhBT002dXZP422OqSqCh0qrR2HTT2eLu1rJ18Y9R5+7t84vA== X-Received: by 2002:a92:6408:0:b0:349:5c87:e712 with SMTP id y8-20020a926408000000b003495c87e712mr5356429ilb.1.1691406930655; Mon, 07 Aug 2023 04:15:30 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.15.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:15:30 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 26/48] dm: dynamically allocate the dm-bufio shrinker Date: Mon, 7 Aug 2023 19:09:14 +0800 Message-Id: <20230807110936.21819-27-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the dm-bufio shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct dm_bufio_client. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/md/dm-bufio.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-) diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c index bc309e41d074..62eb27639c9b 100644 --- a/drivers/md/dm-bufio.c +++ b/drivers/md/dm-bufio.c @@ -963,7 +963,7 @@ struct dm_bufio_client { sector_t start; - struct shrinker shrinker; + struct shrinker *shrinker; struct work_struct shrink_work; atomic_long_t need_shrink; @@ -2368,7 +2368,7 @@ static unsigned long dm_bufio_shrink_scan(struct shrinker *shrink, struct shrink { struct dm_bufio_client *c; - c = container_of(shrink, struct dm_bufio_client, shrinker); + c = shrink->private_data; atomic_long_add(sc->nr_to_scan, &c->need_shrink); queue_work(dm_bufio_wq, &c->shrink_work); @@ -2377,7 +2377,7 @@ static unsigned long dm_bufio_shrink_scan(struct shrinker *shrink, struct shrink static unsigned long dm_bufio_shrink_count(struct shrinker *shrink, struct shrink_control *sc) { - struct dm_bufio_client *c = container_of(shrink, struct dm_bufio_client, shrinker); + struct dm_bufio_client *c = shrink->private_data; unsigned long count = cache_total(&c->cache); unsigned long retain_target = get_retain_buffers(c); unsigned long queued_for_cleanup = atomic_long_read(&c->need_shrink); @@ -2490,14 +2490,20 @@ struct dm_bufio_client *dm_bufio_client_create(struct block_device *bdev, unsign INIT_WORK(&c->shrink_work, shrink_work); atomic_long_set(&c->need_shrink, 0); - c->shrinker.count_objects = dm_bufio_shrink_count; - c->shrinker.scan_objects = dm_bufio_shrink_scan; - c->shrinker.seeks = 1; - c->shrinker.batch = 0; - r = register_shrinker(&c->shrinker, "dm-bufio:(%u:%u)", - MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev)); - if (r) + c->shrinker = shrinker_alloc(0, "dm-bufio:(%u:%u)", + MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev)); + if (!c->shrinker) { + r = -ENOMEM; goto bad; + } + + c->shrinker->count_objects = dm_bufio_shrink_count; + c->shrinker->scan_objects = dm_bufio_shrink_scan; + c->shrinker->seeks = 1; + c->shrinker->batch = 0; + c->shrinker->private_data = c; + + shrinker_register(c->shrinker); mutex_lock(&dm_bufio_clients_lock); dm_bufio_client_count++; @@ -2537,7 +2543,7 @@ void dm_bufio_client_destroy(struct dm_bufio_client *c) drop_buffers(c); - unregister_shrinker(&c->shrinker); + shrinker_free(c->shrinker); flush_work(&c->shrink_work); mutex_lock(&dm_bufio_clients_lock); From patchwork Mon Aug 7 11:09:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711233 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A941C04A94 for ; Mon, 7 Aug 2023 11:18:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232294AbjHGLSx (ORCPT ); Mon, 7 Aug 2023 07:18:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232478AbjHGLSQ (ORCPT ); Mon, 7 Aug 2023 07:18:16 -0400 Received: from mail-pj1-x102a.google.com (mail-pj1-x102a.google.com [IPv6:2607:f8b0:4864:20::102a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA2EA4692 for ; Mon, 7 Aug 2023 04:16:48 -0700 (PDT) Received: by mail-pj1-x102a.google.com with SMTP id 98e67ed59e1d1-268663fb09cso631557a91.0 for ; Mon, 07 Aug 2023 04:16:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406943; x=1692011743; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=qDCHIUUJzhdUAQEb2C7RW/Dwv8wB1L4nNlzD+13VK1U=; b=BoRgxmNUDtxzbmTK8+NbyH+07KYCd+Dr+oKPPa6V2FtEa17D0GvDQxjGlpnMkhmfxh v95DV47NbKABEXmmquIWadBnc0OBxkEOLW5WkwOTzTf/BxgV/A3wBC3uAtz5110v+hzE Ab8A6lWD76Mq+5DiKmh8yjejLb6xJUC09A5jGZ8oJIUHv3JYqq06sjhL7prumjkiRo3O qB570Dus+/9+aUH0B/0q8kHN6EW2eaOwjl0xOlzT2kA7NW6hf0e/OVGGbp1TjXoLyoWq aNUKJyMjC1sbPHUX4hmJJ6cJvGihC8n4kqK2Irls4fBt7l8WiF7MHJ0n9oTLuTvoH1vN CZ3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406943; x=1692011743; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=qDCHIUUJzhdUAQEb2C7RW/Dwv8wB1L4nNlzD+13VK1U=; b=NYqgXL3e6utcYf8G7vihndOTLxOZFEBugMJRriklelD2QKEbNwmFbXR1VPjMl42waq ZZ9Eft3d5yaj1KiDPMokHYBoQTfLMiaC1yq2HA7FFRWTtfCgy6IfTzX45Wk/ps+XTSlh AS1pGDqTG0T76yB/hnI39yMzVSAIQ7hXyvJK8M90mX3yYG2AOgWyNIY0AJqgutoHqbVm ZNkDj2mg7M6ImEjxSh9xGFAsnKw5hAWeMIFvg90yzvMpmmdI/ENcAnKMcC3jhXwdpSoz uLtX9MpJMHdrapWvrWoDCjmCar8ngqnenN13kwdhbupTKc5X/jqr6kVG4t6Ay8pAepX4 wHsQ== X-Gm-Message-State: ABy/qLYOHhftKhu2yE3UBVyLbE09FGzrKdrFAHPLlAZwALnMjXbAm61o tXkdU0g//ssRS455NTSf0q8P7g== X-Google-Smtp-Source: APBJJlEUCHWWWNXSTNLHQrmZRIrp+biqETFoyppqOsbwjUrAqcyZvOjgkWFuVkSEp/5UbdP5i9KhZA== X-Received: by 2002:a17:90a:6c97:b0:263:730b:f568 with SMTP id y23-20020a17090a6c9700b00263730bf568mr23067993pjj.3.1691406943426; Mon, 07 Aug 2023 04:15:43 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.15.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:15:43 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 27/48] dm zoned: dynamically allocate the dm-zoned-meta shrinker Date: Mon, 7 Aug 2023 19:09:15 +0800 Message-Id: <20230807110936.21819-28-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the dm-zoned-meta shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct dmz_metadata. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/md/dm-zoned-metadata.c | 29 +++++++++++++++++------------ 1 file changed, 17 insertions(+), 12 deletions(-) diff --git a/drivers/md/dm-zoned-metadata.c b/drivers/md/dm-zoned-metadata.c index 9d3cca8e3dc9..bbb0e69a7908 100644 --- a/drivers/md/dm-zoned-metadata.c +++ b/drivers/md/dm-zoned-metadata.c @@ -187,7 +187,7 @@ struct dmz_metadata { struct rb_root mblk_rbtree; struct list_head mblk_lru_list; struct list_head mblk_dirty_list; - struct shrinker mblk_shrinker; + struct shrinker *mblk_shrinker; /* Zone allocation management */ struct mutex map_lock; @@ -615,7 +615,7 @@ static unsigned long dmz_shrink_mblock_cache(struct dmz_metadata *zmd, static unsigned long dmz_mblock_shrinker_count(struct shrinker *shrink, struct shrink_control *sc) { - struct dmz_metadata *zmd = container_of(shrink, struct dmz_metadata, mblk_shrinker); + struct dmz_metadata *zmd = shrink->private_data; return atomic_read(&zmd->nr_mblks); } @@ -626,7 +626,7 @@ static unsigned long dmz_mblock_shrinker_count(struct shrinker *shrink, static unsigned long dmz_mblock_shrinker_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct dmz_metadata *zmd = container_of(shrink, struct dmz_metadata, mblk_shrinker); + struct dmz_metadata *zmd = shrink->private_data; unsigned long count; spin_lock(&zmd->mblk_lock); @@ -2936,19 +2936,24 @@ int dmz_ctr_metadata(struct dmz_dev *dev, int num_dev, */ zmd->min_nr_mblks = 2 + zmd->nr_map_blocks + zmd->zone_nr_bitmap_blocks * 16; zmd->max_nr_mblks = zmd->min_nr_mblks + 512; - zmd->mblk_shrinker.count_objects = dmz_mblock_shrinker_count; - zmd->mblk_shrinker.scan_objects = dmz_mblock_shrinker_scan; - zmd->mblk_shrinker.seeks = DEFAULT_SEEKS; /* Metadata cache shrinker */ - ret = register_shrinker(&zmd->mblk_shrinker, "dm-zoned-meta:(%u:%u)", - MAJOR(dev->bdev->bd_dev), - MINOR(dev->bdev->bd_dev)); - if (ret) { - dmz_zmd_err(zmd, "Register metadata cache shrinker failed"); + zmd->mblk_shrinker = shrinker_alloc(0, "dm-zoned-meta:(%u:%u)", + MAJOR(dev->bdev->bd_dev), + MINOR(dev->bdev->bd_dev)); + if (!zmd->mblk_shrinker) { + ret = -ENOMEM; + dmz_zmd_err(zmd, "Allocate metadata cache shrinker failed"); goto err; } + zmd->mblk_shrinker->count_objects = dmz_mblock_shrinker_count; + zmd->mblk_shrinker->scan_objects = dmz_mblock_shrinker_scan; + zmd->mblk_shrinker->seeks = DEFAULT_SEEKS; + zmd->mblk_shrinker->private_data = zmd; + + shrinker_register(zmd->mblk_shrinker); + dmz_zmd_info(zmd, "DM-Zoned metadata version %d", zmd->sb_version); for (i = 0; i < zmd->nr_devs; i++) dmz_print_dev(zmd, i); @@ -2995,7 +3000,7 @@ int dmz_ctr_metadata(struct dmz_dev *dev, int num_dev, */ void dmz_dtr_metadata(struct dmz_metadata *zmd) { - unregister_shrinker(&zmd->mblk_shrinker); + shrinker_free(zmd->mblk_shrinker); dmz_cleanup_metadata(zmd); kfree(zmd); } From patchwork Mon Aug 7 11:09:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712883 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD92EC001B0 for ; Mon, 7 Aug 2023 11:37:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232944AbjHGLh0 (ORCPT ); Mon, 7 Aug 2023 07:37:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42844 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231822AbjHGLg7 (ORCPT ); Mon, 7 Aug 2023 07:36:59 -0400 Received: from mail-qt1-x82c.google.com (mail-qt1-x82c.google.com [IPv6:2607:f8b0:4864:20::82c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9FB3359A for ; Mon, 7 Aug 2023 04:33:30 -0700 (PDT) Received: by mail-qt1-x82c.google.com with SMTP id d75a77b69052e-40ff9749be6so5346631cf.1 for ; Mon, 07 Aug 2023 04:33:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407949; x=1692012749; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=x1yZWn5jqhhXD5GlPCwn7Rqy/lqVgw4fKiPcfLbuAyw=; b=TSzVqN1awf5quXoV/mPrT0rGCe4lKG/LMsW9dqxvu/QlTkTEmN5Fzi3hODYc91vqb1 xi5rKdWvP5lpgN+mFlqxE/4h7awHryDUKzQO6Oltz2riQUELfu+aI4k+6SA598gWgYWD D4VxfZ0qApKtWSBrKaFnn8Wtc/VpwlVLu3nsJmi5bxSWXZV65VMCiVrI0+Ckg9f+HQUA YFEVwimMOsSDSBXpBS08EvIJRmlUT7c0buNxNXLOI+YjwVkVaggf9kpODYpB0D96eShS xlO+K0gVA1lcn8pOoToekE4rCF8B0h2OFgrZeVffofCr3fPqyITa8N+DGxxiHlBbd9Jm q2fg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407949; x=1692012749; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=x1yZWn5jqhhXD5GlPCwn7Rqy/lqVgw4fKiPcfLbuAyw=; b=KtLtb6ChcLO+Nv5Bz4gQ7dP5l+dJSeFhmjcZERURc7aojShXL5THrqnfca1On9CHfm Hw7dncjqrZwomNyiQ/fx6Phdb6cqyeUkIR1lGi5jxwt8Ipkr5rELALlbldOwRsiOgyTn XWHj8OV+5vzO/FISw8Pp2iEDu3kRTs56sd/CEasIz5X/liXue1WVi7ccsH+MtzerT/oR ZvUO554x2jmTv6mEhZFwVhkEFpJs5fE2skA0ky4Eil+RqdUdA9/yAA2T01FKvFVINp4z Jp/SPaTgI4YFF6ydiFMBFT4ZVqOXYRgUUZsC5Bx5UlYzfMFzXleURVK+EFypNGb2dtLt 6o3w== X-Gm-Message-State: ABy/qLa5Ctsy2DHpIJ3pky4SyTNqef9LGiMwMsGGtAUWbrYAWF5qTOMY 6b08TCNb7eF6CnGd9Y0xThHxvuMu6OV8h6frXJ8= X-Google-Smtp-Source: AGHT+IFmiFe8iRG7X1ND7nrFgfyiRFI3F00Omyk3P1Mi12alvC2oRACqfoDpuN1VIlTmyfJiX72rxw== X-Received: by 2002:a17:90a:2909:b0:269:5bf7:d79c with SMTP id g9-20020a17090a290900b002695bf7d79cmr2218056pjd.1.1691406956537; Mon, 07 Aug 2023 04:15:56 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.15.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:15:55 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 28/48] md/raid5: dynamically allocate the md-raid5 shrinker Date: Mon, 7 Aug 2023 19:09:16 +0800 Message-Id: <20230807110936.21819-29-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the md-raid5 shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct r5conf. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/md/raid5.c | 26 +++++++++++++++----------- drivers/md/raid5.h | 2 +- 2 files changed, 16 insertions(+), 12 deletions(-) diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 32a87193bad7..e284c2f7dbe4 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -7401,7 +7401,7 @@ static void free_conf(struct r5conf *conf) log_exit(conf); - unregister_shrinker(&conf->shrinker); + shrinker_free(conf->shrinker); free_thread_groups(conf); shrink_stripes(conf); raid5_free_percpu(conf); @@ -7449,7 +7449,7 @@ static int raid5_alloc_percpu(struct r5conf *conf) static unsigned long raid5_cache_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct r5conf *conf = container_of(shrink, struct r5conf, shrinker); + struct r5conf *conf = shrink->private_data; unsigned long ret = SHRINK_STOP; if (mutex_trylock(&conf->cache_size_mutex)) { @@ -7470,7 +7470,7 @@ static unsigned long raid5_cache_scan(struct shrinker *shrink, static unsigned long raid5_cache_count(struct shrinker *shrink, struct shrink_control *sc) { - struct r5conf *conf = container_of(shrink, struct r5conf, shrinker); + struct r5conf *conf = shrink->private_data; if (conf->max_nr_stripes < conf->min_nr_stripes) /* unlikely, but not impossible */ @@ -7705,18 +7705,22 @@ static struct r5conf *setup_conf(struct mddev *mddev) * it reduces the queue depth and so can hurt throughput. * So set it rather large, scaled by number of devices. */ - conf->shrinker.seeks = DEFAULT_SEEKS * conf->raid_disks * 4; - conf->shrinker.scan_objects = raid5_cache_scan; - conf->shrinker.count_objects = raid5_cache_count; - conf->shrinker.batch = 128; - conf->shrinker.flags = 0; - ret = register_shrinker(&conf->shrinker, "md-raid5:%s", mdname(mddev)); - if (ret) { - pr_warn("md/raid:%s: couldn't register shrinker.\n", + conf->shrinker = shrinker_alloc(0, "md-raid5:%s", mdname(mddev)); + if (!conf->shrinker) { + ret = -ENOMEM; + pr_warn("md/raid:%s: couldn't allocate shrinker.\n", mdname(mddev)); goto abort; } + conf->shrinker->seeks = DEFAULT_SEEKS * conf->raid_disks * 4; + conf->shrinker->scan_objects = raid5_cache_scan; + conf->shrinker->count_objects = raid5_cache_count; + conf->shrinker->batch = 128; + conf->shrinker->private_data = conf; + + shrinker_register(conf->shrinker); + sprintf(pers_name, "raid%d", mddev->new_level); rcu_assign_pointer(conf->thread, md_register_thread(raid5d, mddev, pers_name)); diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index 97a795979a35..22bea20eccbd 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -670,7 +670,7 @@ struct r5conf { wait_queue_head_t wait_for_stripe; wait_queue_head_t wait_for_overlap; unsigned long cache_state; - struct shrinker shrinker; + struct shrinker *shrinker; int pool_size; /* number of disks in stripeheads in pool */ spinlock_t device_lock; struct disk_info *disks; From patchwork Mon Aug 7 11:09:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712891 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7F7F6C001DF for ; Mon, 7 Aug 2023 11:25:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232645AbjHGLZZ (ORCPT ); Mon, 7 Aug 2023 07:25:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59176 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231334AbjHGLYd (ORCPT ); Mon, 7 Aug 2023 07:24:33 -0400 Received: from mail-pj1-f52.google.com (mail-pj1-f52.google.com [209.85.216.52]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 383A8558F for ; Mon, 7 Aug 2023 04:22:03 -0700 (PDT) Received: by mail-pj1-f52.google.com with SMTP id 98e67ed59e1d1-2680edb9767so930782a91.0 for ; Mon, 07 Aug 2023 04:22:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406969; x=1692011769; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=v2xQZfHf5bNVsT7uWSGQWuu07PHxrGT3T56hFvtqSrg=; b=PhZgEytbdr8CvNBxueya8LJEBJpXwGWT4buounuwMzZgdINLVWVhWlDlK5qgc2p2kt RnCQbjUwWxqdm7J4M7EGc1Ch17V+zcgd4r1Zi/3vO2292nZ9ssUadxFIe0dzINz36EEw HVRix2YnCwrYzOYArOpD9yWwDi1L0lwbZbmCgyeiLVpEO0l9z3l7+yQI3NnEvQZkBYSV kAWt+c/pFJSgV6aTUUqi7ips5HoQ3TEpyq/Sxi9XAc6jQa+5WRv9fo1CMPIL4wKkfI5R cCEylx4Q4qJCTb4YKG/AnxQtLRIB707mPePFz8XepMv7bUxA9w4l0/+xaTDhOuBgbM/U hPfQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406969; x=1692011769; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=v2xQZfHf5bNVsT7uWSGQWuu07PHxrGT3T56hFvtqSrg=; b=QBzs8VH3d3eh8FVZy+ANPGB/q/0l7EGbEvg1ll8QE3lHDgXMdwJH4H061RfyfKLWP+ sEr2VWFwudQVIMTfPGs+wXvC2D45biEhGVlOy+hjJWkVChiMwnJ18WKj/A8gFbrT2+7T 0gz0UCKydeX+BVvynf25P6DaRHUEamY163t0hQmNlOdjPS6pTk4D3g+50is3pjEV3q0z /OBTjK2I3lrSyOV39GMUwL0QZOJtbohj5yEbVy2dFLertVgJ7VsBojaY/mPzA9coX1JM emdTkLTCMUxwivNArNVlW8p4jsA7aW8sIyQGfIukLy2u/LQ3MZ23jPFwDNkvCHBxFI6j dkiw== X-Gm-Message-State: AOJu0YwyEJTUpeb7gNjXZKUr/d1cqkr6vseKyBeNtI6cl0Od48bx0+fE pQHcRk+JCT1QeagLgnvUy+yr2Q== X-Google-Smtp-Source: AGHT+IFlvQWL2g4YOY+ZhMNeAWWdQSS9yshpdy35E0gAyloBC4LB48Br4CdI402F04hX0eeuRkMt6Q== X-Received: by 2002:a17:90a:c8d:b0:268:196f:9656 with SMTP id v13-20020a17090a0c8d00b00268196f9656mr12999255pja.1.1691406969055; Mon, 07 Aug 2023 04:16:09 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.15.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:16:08 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 29/48] bcache: dynamically allocate the md-bcache shrinker Date: Mon, 7 Aug 2023 19:09:17 +0800 Message-Id: <20230807110936.21819-30-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the md-bcache shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct cache_set. Signed-off-by: Qi Zheng --- drivers/md/bcache/bcache.h | 2 +- drivers/md/bcache/btree.c | 27 ++++++++++++++++----------- drivers/md/bcache/sysfs.c | 3 ++- 3 files changed, 19 insertions(+), 13 deletions(-) diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h index 5a79bb3c272f..c622bc50f81b 100644 --- a/drivers/md/bcache/bcache.h +++ b/drivers/md/bcache/bcache.h @@ -541,7 +541,7 @@ struct cache_set { struct bio_set bio_split; /* For the btree cache */ - struct shrinker shrink; + struct shrinker *shrink; /* For the btree cache and anything allocation related */ struct mutex bucket_lock; diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index fd121a61f17c..ae5cbb55861f 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -667,7 +667,7 @@ static int mca_reap(struct btree *b, unsigned int min_order, bool flush) static unsigned long bch_mca_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct cache_set *c = container_of(shrink, struct cache_set, shrink); + struct cache_set *c = shrink->private_data; struct btree *b, *t; unsigned long i, nr = sc->nr_to_scan; unsigned long freed = 0; @@ -734,7 +734,7 @@ static unsigned long bch_mca_scan(struct shrinker *shrink, static unsigned long bch_mca_count(struct shrinker *shrink, struct shrink_control *sc) { - struct cache_set *c = container_of(shrink, struct cache_set, shrink); + struct cache_set *c = shrink->private_data; if (c->shrinker_disabled) return 0; @@ -752,8 +752,8 @@ void bch_btree_cache_free(struct cache_set *c) closure_init_stack(&cl); - if (c->shrink.list.next) - unregister_shrinker(&c->shrink); + if (c->shrink) + shrinker_free(c->shrink); mutex_lock(&c->bucket_lock); @@ -828,14 +828,19 @@ int bch_btree_cache_alloc(struct cache_set *c) c->verify_data = NULL; #endif - c->shrink.count_objects = bch_mca_count; - c->shrink.scan_objects = bch_mca_scan; - c->shrink.seeks = 4; - c->shrink.batch = c->btree_pages * 2; + c->shrink = shrinker_alloc(0, "md-bcache:%pU", c->set_uuid); + if (!c->shrink) { + pr_warn("bcache: %s: could not allocate shrinker\n", __func__); + return 0; + } + + c->shrink->count_objects = bch_mca_count; + c->shrink->scan_objects = bch_mca_scan; + c->shrink->seeks = 4; + c->shrink->batch = c->btree_pages * 2; + c->shrink->private_data = c; - if (register_shrinker(&c->shrink, "md-bcache:%pU", c->set_uuid)) - pr_warn("bcache: %s: could not register shrinker\n", - __func__); + shrinker_register(c->shrink); return 0; } diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c index 0e2c1880f60b..45d8af755de6 100644 --- a/drivers/md/bcache/sysfs.c +++ b/drivers/md/bcache/sysfs.c @@ -866,7 +866,8 @@ STORE(__bch_cache_set) sc.gfp_mask = GFP_KERNEL; sc.nr_to_scan = strtoul_or_return(buf); - c->shrink.scan_objects(&c->shrink, &sc); + if (c->shrink) + c->shrink->scan_objects(c->shrink, &sc); } sysfs_strtoul_clamp(congested_read_threshold_us, From patchwork Mon Aug 7 11:09:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711226 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BCB03EB64DD for ; Mon, 7 Aug 2023 11:25:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232501AbjHGLZh (ORCPT ); Mon, 7 Aug 2023 07:25:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58078 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232549AbjHGLZE (ORCPT ); Mon, 7 Aug 2023 07:25:04 -0400 Received: from mail-pg1-f175.google.com (mail-pg1-f175.google.com [209.85.215.175]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9DC05595 for ; Mon, 7 Aug 2023 04:22:16 -0700 (PDT) Received: by mail-pg1-f175.google.com with SMTP id 41be03b00d2f7-56462258cdeso526637a12.1 for ; Mon, 07 Aug 2023 04:22:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691406982; x=1692011782; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=2n4eBW/y496rw0R30jGqgr9PaTd+TyGx4MFgxeJTY98=; b=FnWDWj5rwzmfFGLsv5BbODxTKmQBAUJaoO/xwiU3xtz9tOZ2AwDnatjsq2ab3ilYeJ iWF7FCg8OfJEY1lx/DDczF41LpfDlE6nRRduQxYHOyP9X3uK7n/ZO9q7VAhZSG3xs95Q OqWz/XghzU3SfaeMxwONvmK/HIjBzGEUASf2JFKX93u1G15t5fAwcHUsocilVhQXHkyU J1tWV2QNpc4U36fDDO4ejlIhucfEnNm2u0Wt3z4T4cfN7wJRCQagqckfUu/vztdG0xlS Buj0JJnUwu7QR/DBMG2ve3ld5n35BuwOJKjICt4m1cvU7hXO7dkM+KrhCZs3CTAs8/64 gYbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691406982; x=1692011782; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=2n4eBW/y496rw0R30jGqgr9PaTd+TyGx4MFgxeJTY98=; b=bjVER66yn/Gon/Y1QRU+ksJed/1WMY2c0rZMTXGLw2bhO5zqbG52as8zFpb0BW+2SL t+X82oOEVmuLdkCJDhOPKyy8jzKrPqnH8FCjiEKRXPLUfxjX4OqHuY++4i3bsYqDXmPb yp84pSd2sdhgBWCQR8U+7//yGnJR99mLWwV0kskCmlchDB4vVXxLEbk2g1o/aEcZwr9p DjaE94wZgERNu2oSTDjcSTuianrUINMFJgUOGomVA7E96lCc319ty0VN3t1XIzZv1Vkr uKrTrInl+uWwxlg50jsQGmeJYpn3UT0qTcZovV0O+P2+UhnOPcVUEkp5X1jPjaIliz0w RHpQ== X-Gm-Message-State: ABy/qLbnIs9PRST15/UKrfqJjXWWWTfOECi91ZxIDOZBKyL1irvB14d9 4dNsrprLJrfjrT9iZG/kpVcUzg== X-Google-Smtp-Source: APBJJlGfZoIKy5dlf67l9aDnuNmoWN294jSLFWBRn8Nrl68gwCTSSg7v4NaF4AAHW/6J0zEJitKJCg== X-Received: by 2002:a17:90a:1f83:b0:268:3dc6:f0c5 with SMTP id x3-20020a17090a1f8300b002683dc6f0c5mr25038018pja.0.1691406981820; Mon, 07 Aug 2023 04:16:21 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.16.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:16:21 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 30/48] vmw_balloon: dynamically allocate the vmw-balloon shrinker Date: Mon, 7 Aug 2023 19:09:18 +0800 Message-Id: <20230807110936.21819-31-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the vmw-balloon shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct vmballoon. And we can simply exit vmballoon_init() when registering the shrinker fails. So the shrinker_registered indication is redundant, just remove it. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/misc/vmw_balloon.c | 38 ++++++++++++-------------------------- 1 file changed, 12 insertions(+), 26 deletions(-) diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c index 9ce9b9e0e9b6..ac2cdb6cdf74 100644 --- a/drivers/misc/vmw_balloon.c +++ b/drivers/misc/vmw_balloon.c @@ -380,16 +380,7 @@ struct vmballoon { /** * @shrinker: shrinker interface that is used to avoid over-inflation. */ - struct shrinker shrinker; - - /** - * @shrinker_registered: whether the shrinker was registered. - * - * The shrinker interface does not handle gracefully the removal of - * shrinker that was not registered before. This indication allows to - * simplify the unregistration process. - */ - bool shrinker_registered; + struct shrinker *shrinker; }; static struct vmballoon balloon; @@ -1568,29 +1559,27 @@ static unsigned long vmballoon_shrinker_count(struct shrinker *shrinker, static void vmballoon_unregister_shrinker(struct vmballoon *b) { - if (b->shrinker_registered) - unregister_shrinker(&b->shrinker); - b->shrinker_registered = false; + shrinker_free(b->shrinker); } static int vmballoon_register_shrinker(struct vmballoon *b) { - int r; - /* Do nothing if the shrinker is not enabled */ if (!vmwballoon_shrinker_enable) return 0; - b->shrinker.scan_objects = vmballoon_shrinker_scan; - b->shrinker.count_objects = vmballoon_shrinker_count; - b->shrinker.seeks = DEFAULT_SEEKS; + b->shrinker = shrinker_alloc(0, "vmw-balloon"); + if (!b->shrinker) + return -ENOMEM; - r = register_shrinker(&b->shrinker, "vmw-balloon"); + b->shrinker->scan_objects = vmballoon_shrinker_scan; + b->shrinker->count_objects = vmballoon_shrinker_count; + b->shrinker->seeks = DEFAULT_SEEKS; + b->shrinker->private_data = b; - if (r == 0) - b->shrinker_registered = true; + shrinker_register(b->shrinker); - return r; + return 0; } /* @@ -1883,7 +1872,7 @@ static int __init vmballoon_init(void) error = vmballoon_register_shrinker(&balloon); if (error) - goto fail; + return error; /* * Initialization of compaction must be done after the call to @@ -1905,9 +1894,6 @@ static int __init vmballoon_init(void) vmballoon_debugfs_init(&balloon); return 0; -fail: - vmballoon_unregister_shrinker(&balloon); - return error; } /* From patchwork Mon Aug 7 11:09:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711218 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C561C04A94 for ; Mon, 7 Aug 2023 11:38:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232600AbjHGLim (ORCPT ); Mon, 7 Aug 2023 07:38:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233065AbjHGLhw (ORCPT ); Mon, 7 Aug 2023 07:37:52 -0400 Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7115359DC for ; Mon, 7 Aug 2023 04:34:37 -0700 (PDT) Received: by mail-pj1-x102c.google.com with SMTP id 98e67ed59e1d1-268663fb09cso635071a91.0 for ; Mon, 07 Aug 2023 04:34:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691408030; x=1692012830; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=nhs5C6wYTK112tB0Y3rKeCsMBEmGx3fQoCnqZ3HCCLA=; b=fWE7ZZpfxre6cKLPJosewiAcjZvGGSEit8pb4JQphgF1TUE6haa7Np8azoFhdEVhSz 7KwFImSmXZtx/mDZCi6YeE2+LUuIQrxaYK+ReiZ4hMteWiCVffJdNV7NQqZfZ9joCbt1 1dV4t/LmtA2XkBt3k3y1I2FYmFkkbrn62fo+F/Y09WSKe85bLsZroXBELzqL6lNgr46T cZ6EQyM/fKpsa0M/VN3Rjhbs9weEo0P0srm8ebqqkh6Np16RSdBiaaHcVA4NcwmyLJmu xhY4ggpl2JDkvR/Gz7T8V01WXJxlqcLuXXkl0JlXqA078ztZe4sI59e7a1HQq0UHgVdd 6xgg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691408030; x=1692012830; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=nhs5C6wYTK112tB0Y3rKeCsMBEmGx3fQoCnqZ3HCCLA=; b=L2NRxz5Khnp7BH7lZogvPN4gvQR4ZhDEQ5NVthYWG5NaTOvcd5kRA6md2F0/3K7Wp4 UXFrghhW5G5pzOkUZB1N68kKpAS7X7SgTw3l0BoyCkU9lBFDDNkZAPZxiNazUXF+OjC4 ENr67H96dkKihuWXGbKAeVSC7NtNVej773MBwJqtd0t9lQ7Ppk6kSSH4zVI7h2zx32CA Jbe3IZNmMVu+aZWwwOvmf2iyok5suiqOGSBejdMxZvlBl9xkrj2MGQ5ahkHA2zTfVYdj n5nyycVrk/E0LZm7Wi3iAvDhTooEpoeHKEKf1YkWstXPBdJYA7Fhj+U4Ym2eVi4icjAU lO8w== X-Gm-Message-State: ABy/qLawiYLYgwWuG7LbofgAjBDwcSDZETbm0jy15ZT+Qi01k8yodOda blzh3mwdz/Md90y36Wn8wL4UFpuAHtBV3jh9ack= X-Google-Smtp-Source: AGHT+IF623rMYCfdnVm3rDQUM9QMv5wRA4teIiBc32f8XUPEVkH5VguN8eCSFu0xAaU5upe3gsVL9w== X-Received: by 2002:a17:90a:6701:b0:269:32c7:24dc with SMTP id n1-20020a17090a670100b0026932c724dcmr6035493pjj.0.1691406994765; Mon, 07 Aug 2023 04:16:34 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.16.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:16:34 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 31/48] virtio_balloon: dynamically allocate the virtio-balloon shrinker Date: Mon, 7 Aug 2023 19:09:19 +0800 Message-Id: <20230807110936.21819-32-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the virtio-balloon shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct virtio_balloon. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- drivers/virtio/virtio_balloon.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 5b15936a5214..82e6087073a9 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -111,7 +111,7 @@ struct virtio_balloon { struct virtio_balloon_stat stats[VIRTIO_BALLOON_S_NR]; /* Shrinker to return free pages - VIRTIO_BALLOON_F_FREE_PAGE_HINT */ - struct shrinker shrinker; + struct shrinker *shrinker; /* OOM notifier to deflate on OOM - VIRTIO_BALLOON_F_DEFLATE_ON_OOM */ struct notifier_block oom_nb; @@ -816,8 +816,7 @@ static unsigned long shrink_free_pages(struct virtio_balloon *vb, static unsigned long virtio_balloon_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { - struct virtio_balloon *vb = container_of(shrinker, - struct virtio_balloon, shrinker); + struct virtio_balloon *vb = shrinker->private_data; return shrink_free_pages(vb, sc->nr_to_scan); } @@ -825,8 +824,7 @@ static unsigned long virtio_balloon_shrinker_scan(struct shrinker *shrinker, static unsigned long virtio_balloon_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) { - struct virtio_balloon *vb = container_of(shrinker, - struct virtio_balloon, shrinker); + struct virtio_balloon *vb = shrinker->private_data; return vb->num_free_page_blocks * VIRTIO_BALLOON_HINT_BLOCK_PAGES; } @@ -847,16 +845,23 @@ static int virtio_balloon_oom_notify(struct notifier_block *nb, static void virtio_balloon_unregister_shrinker(struct virtio_balloon *vb) { - unregister_shrinker(&vb->shrinker); + shrinker_free(vb->shrinker); } static int virtio_balloon_register_shrinker(struct virtio_balloon *vb) { - vb->shrinker.scan_objects = virtio_balloon_shrinker_scan; - vb->shrinker.count_objects = virtio_balloon_shrinker_count; - vb->shrinker.seeks = DEFAULT_SEEKS; + vb->shrinker = shrinker_alloc(0, "virtio-balloon"); + if (!vb->shrinker) + return -ENOMEM; - return register_shrinker(&vb->shrinker, "virtio-balloon"); + vb->shrinker->scan_objects = virtio_balloon_shrinker_scan; + vb->shrinker->count_objects = virtio_balloon_shrinker_count; + vb->shrinker->seeks = DEFAULT_SEEKS; + vb->shrinker->private_data = vb; + + shrinker_register(vb->shrinker); + + return 0; } static int virtballoon_probe(struct virtio_device *vdev) From patchwork Mon Aug 7 11:09:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712890 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 25419C001DF for ; Mon, 7 Aug 2023 11:26:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232574AbjHGL0j (ORCPT ); Mon, 7 Aug 2023 07:26:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232575AbjHGL00 (ORCPT ); Mon, 7 Aug 2023 07:26:26 -0400 Received: from mail-pj1-f45.google.com (mail-pj1-f45.google.com [209.85.216.45]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 21DA82109 for ; Mon, 7 Aug 2023 04:22:53 -0700 (PDT) Received: by mail-pj1-f45.google.com with SMTP id 98e67ed59e1d1-265c94064b8so593078a91.0 for ; Mon, 07 Aug 2023 04:22:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407007; x=1692011807; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=xVRvDV5EwClRaurogoo7jeCmWiPiam6NNimoVigpYsU=; b=ZpUxkeIDSk5DebcqgtNkjC2VJVRAtk53SZcSRGK4pcR9GN/+oNusiQFLHhuL5+fDtw 7acmwH5I9QFGztB582Oi6rcT7wKm21cMdk1CbKhqvY9Cmn9xfrqO2dNVGGjerHD5cIRA JQtjfGPdI2ZqgIP1F2QTrXkDr1QXGVfPleR0HQt933rEeM4xbQBZZP8jkCpRscjQOmu/ 9ghKZGvMUY+k4JEeKO1r8tlLUiIWng6Gl6oS+MWXEsfNz6xEM3RIsZmLQbyECe49vE1Q 39HHbQOTTkWnAgiDXPq6I3IGqNg8FapL1nhN+TNChCmLrlL9RKqe8AW+z81Q9HVEEwQe Rdpg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407007; x=1692011807; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=xVRvDV5EwClRaurogoo7jeCmWiPiam6NNimoVigpYsU=; b=MFHiL/oPOX4We0uoxSbE9KqmPOeARiKRXUNIQkZfCqKymhhshYizMjhwUB8Q/g4SuC 5YN6gn+LUdzMDSKS9JrRUPwTHdiq2AhSKHXI5z4qHqeRdXN+krY2RMv1pqsZA488w5nC QvNE5bu8mtovN8GURGNwnFUBQD9F3M+K++WOIhmAAFsnl2AaMpfa3ZtbSnQ9/bHwrzyp 6byPjXP/xUp/4C3N0iaruuQERTWPeukG6D8pn7dYAYmF86yv3fX59AKTMlg3ueE/L3q8 pGP5kbVgZe7DRhTnuwdlF7L8J53pWMkihO0EreFIQS0kCKbxQYgrIU5axE/kgbWNzOlI W/xw== X-Gm-Message-State: ABy/qLYv74QVO9qwVI0FFTU2bie5DbHMkQz8kiJnSi0YaLxtcWA1LKu5 BMtfWIn47d8fKzNqTzwhcjTubA== X-Google-Smtp-Source: APBJJlGBV531Fc0h3gGTcYh+GrDchiBvn4r3DyO1GlE79UVq2Tiyx2gaPN4S9h+mnuBR5bsUMtGvYQ== X-Received: by 2002:a17:90a:ac2:b0:268:f977:848c with SMTP id r2-20020a17090a0ac200b00268f977848cmr15219032pje.2.1691407007341; Mon, 07 Aug 2023 04:16:47 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.16.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:16:47 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 32/48] mbcache: dynamically allocate the mbcache shrinker Date: Mon, 7 Aug 2023 19:09:20 +0800 Message-Id: <20230807110936.21819-33-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the mbcache shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct mb_cache. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/mbcache.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) diff --git a/fs/mbcache.c b/fs/mbcache.c index 2a4b8b549e93..0d1e24e9a5e3 100644 --- a/fs/mbcache.c +++ b/fs/mbcache.c @@ -37,7 +37,7 @@ struct mb_cache { struct list_head c_list; /* Number of entries in cache */ unsigned long c_entry_count; - struct shrinker c_shrink; + struct shrinker *c_shrink; /* Work for shrinking when the cache has too many entries */ struct work_struct c_shrink_work; }; @@ -293,8 +293,7 @@ EXPORT_SYMBOL(mb_cache_entry_touch); static unsigned long mb_cache_count(struct shrinker *shrink, struct shrink_control *sc) { - struct mb_cache *cache = container_of(shrink, struct mb_cache, - c_shrink); + struct mb_cache *cache = shrink->private_data; return cache->c_entry_count; } @@ -333,8 +332,7 @@ static unsigned long mb_cache_shrink(struct mb_cache *cache, static unsigned long mb_cache_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct mb_cache *cache = container_of(shrink, struct mb_cache, - c_shrink); + struct mb_cache *cache = shrink->private_data; return mb_cache_shrink(cache, sc->nr_to_scan); } @@ -377,15 +375,20 @@ struct mb_cache *mb_cache_create(int bucket_bits) for (i = 0; i < bucket_count; i++) INIT_HLIST_BL_HEAD(&cache->c_hash[i]); - cache->c_shrink.count_objects = mb_cache_count; - cache->c_shrink.scan_objects = mb_cache_scan; - cache->c_shrink.seeks = DEFAULT_SEEKS; - if (register_shrinker(&cache->c_shrink, "mbcache-shrinker")) { + cache->c_shrink = shrinker_alloc(0, "mbcache-shrinker"); + if (!cache->c_shrink) { kfree(cache->c_hash); kfree(cache); goto err_out; } + cache->c_shrink->count_objects = mb_cache_count; + cache->c_shrink->scan_objects = mb_cache_scan; + cache->c_shrink->seeks = DEFAULT_SEEKS; + cache->c_shrink->private_data = cache; + + shrinker_register(cache->c_shrink); + INIT_WORK(&cache->c_shrink_work, mb_cache_shrink_worker); return cache; @@ -406,7 +409,7 @@ void mb_cache_destroy(struct mb_cache *cache) { struct mb_cache_entry *entry, *next; - unregister_shrinker(&cache->c_shrink); + shrinker_free(cache->c_shrink); /* * We don't bother with any locking. Cache must not be used at this From patchwork Mon Aug 7 11:09:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712884 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BEB02C001DF for ; Mon, 7 Aug 2023 11:35:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232967AbjHGLf0 (ORCPT ); Mon, 7 Aug 2023 07:35:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42850 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231873AbjHGLfM (ORCPT ); Mon, 7 Aug 2023 07:35:12 -0400 Received: from mail-oi1-x236.google.com (mail-oi1-x236.google.com [IPv6:2607:f8b0:4864:20::236]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D80B10DD for ; Mon, 7 Aug 2023 04:31:55 -0700 (PDT) Received: by mail-oi1-x236.google.com with SMTP id 5614622812f47-3a3ee866e00so454224b6e.0 for ; Mon, 07 Aug 2023 04:31:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407864; x=1692012664; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=EIUP2Z+Njo4a1BEj4icZmHsMWaHOvZz2gypuwwXx0Do=; b=Mn+V6V2BV1ySbFXgSmekXzXckNY63mzQDGj09uFlIR+Xi0VW8GrZk9kdwWRnvyVwgG MlpUVbQeJJveShHO9HgMoKQs+x9+SFyr1l6QpsuaBUv30rchHT+PsGEqj+rD4MW74E9v aBtHYml+OH2UX+F4Z8elEQO17WfhUR/WDW97U65VkYIZX/M6qtKNezLUrAMv7KitbTsJ zBm5OXWTIJzBel3Gfincu6BNZJCeDv+3wb6dzQ7I1lBy7fe/TTx5Ebo1ui24MS4HINM7 SunEO7we8PhLNaW3BMOvzXG4Q4hJ+03rYc4+rJIKhOA9HCrFJbFFx3tchj0I+viC4lyw 5e+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407864; x=1692012664; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=EIUP2Z+Njo4a1BEj4icZmHsMWaHOvZz2gypuwwXx0Do=; b=h9REh0EYhjITOpLdpeLW6fyMYejvUdzf4tM7k9xKBFvs1w/4KTqbpovmCb1Xdo+48+ gSTNCi7SQUmIc/ypAC8zVYxXwnlI+joaY6DST2a5EE2Jyf9gO52VOQS4EwH9BqioIr1O E6Pwm7Q6blKFKRd98R/9+SM0MY8kfYeOwd+oajyfMLf1JWVDk09Q7/7ketjU2QRwMMnj NkeH4MQ3rH/B1i01HN5iF9xf+5uDs9RvfEOqrVUs/UrJLh90bVFoXnZ4zfV/QJjDYEHw HhN3ozPBAWEujEeSrfxXKqEV6qdHwafg4di6RFd90mnMpCgbp2PZNGmUm8eVgUuSHe0w DeoQ== X-Gm-Message-State: ABy/qLaK3GfSbBos3AyHxvgvSfl3DqMBRgskwEjypPG+3CizVepEJcCn mh3m9zm3Zhcx2jme/ygemJNyGw== X-Google-Smtp-Source: AGHT+IGL/1gBIk2C+QwkMNr6hEGRZG4q+xpVeUoXNA4D2kibZqrKnrVjY0bqX283iYX9eWQrJAN/xA== X-Received: by 2002:a17:90a:6701:b0:269:32c7:24dc with SMTP id n1-20020a17090a670100b0026932c724dcmr6036278pjj.0.1691407020016; Mon, 07 Aug 2023 04:17:00 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.16.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:16:59 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 33/48] ext4: dynamically allocate the ext4-es shrinker Date: Mon, 7 Aug 2023 19:09:21 +0800 Message-Id: <20230807110936.21819-34-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the ext4-es shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct ext4_sb_info. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/ext4/ext4.h | 2 +- fs/ext4/extents_status.c | 24 ++++++++++++++---------- 2 files changed, 15 insertions(+), 11 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 481491e892df..48baf03eb1a6 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1657,7 +1657,7 @@ struct ext4_sb_info { __u32 s_csum_seed; /* Reclaim extents from extent status tree */ - struct shrinker s_es_shrinker; + struct shrinker *s_es_shrinker; struct list_head s_es_list; /* List of inodes with reclaimable extents */ long s_es_nr_inode; struct ext4_es_stats s_es_stats; diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c index 9b5b8951afb4..0532a81a7669 100644 --- a/fs/ext4/extents_status.c +++ b/fs/ext4/extents_status.c @@ -1596,7 +1596,7 @@ static unsigned long ext4_es_count(struct shrinker *shrink, unsigned long nr; struct ext4_sb_info *sbi; - sbi = container_of(shrink, struct ext4_sb_info, s_es_shrinker); + sbi = shrink->private_data; nr = percpu_counter_read_positive(&sbi->s_es_stats.es_stats_shk_cnt); trace_ext4_es_shrink_count(sbi->s_sb, sc->nr_to_scan, nr); return nr; @@ -1605,8 +1605,7 @@ static unsigned long ext4_es_count(struct shrinker *shrink, static unsigned long ext4_es_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct ext4_sb_info *sbi = container_of(shrink, - struct ext4_sb_info, s_es_shrinker); + struct ext4_sb_info *sbi = shrink->private_data; int nr_to_scan = sc->nr_to_scan; int ret, nr_shrunk; @@ -1690,13 +1689,18 @@ int ext4_es_register_shrinker(struct ext4_sb_info *sbi) if (err) goto err3; - sbi->s_es_shrinker.scan_objects = ext4_es_scan; - sbi->s_es_shrinker.count_objects = ext4_es_count; - sbi->s_es_shrinker.seeks = DEFAULT_SEEKS; - err = register_shrinker(&sbi->s_es_shrinker, "ext4-es:%s", - sbi->s_sb->s_id); - if (err) + sbi->s_es_shrinker = shrinker_alloc(0, "ext4-es:%s", sbi->s_sb->s_id); + if (!sbi->s_es_shrinker) { + err = -ENOMEM; goto err4; + } + + sbi->s_es_shrinker->scan_objects = ext4_es_scan; + sbi->s_es_shrinker->count_objects = ext4_es_count; + sbi->s_es_shrinker->seeks = DEFAULT_SEEKS; + sbi->s_es_shrinker->private_data = sbi; + + shrinker_register(sbi->s_es_shrinker); return 0; err4: @@ -1716,7 +1720,7 @@ void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi) percpu_counter_destroy(&sbi->s_es_stats.es_stats_cache_misses); percpu_counter_destroy(&sbi->s_es_stats.es_stats_all_cnt); percpu_counter_destroy(&sbi->s_es_stats.es_stats_shk_cnt); - unregister_shrinker(&sbi->s_es_shrinker); + shrinker_free(sbi->s_es_shrinker); } /* From patchwork Mon Aug 7 11:09:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712896 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F423EB64DD for ; Mon, 7 Aug 2023 11:20:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231983AbjHGLUD (ORCPT ); Mon, 7 Aug 2023 07:20:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53544 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232392AbjHGLTu (ORCPT ); Mon, 7 Aug 2023 07:19:50 -0400 Received: from mail-pg1-x533.google.com (mail-pg1-x533.google.com [IPv6:2607:f8b0:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 353A62683 for ; Mon, 7 Aug 2023 04:18:12 -0700 (PDT) Received: by mail-pg1-x533.google.com with SMTP id 41be03b00d2f7-55badd6d6feso572154a12.1 for ; Mon, 07 Aug 2023 04:18:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407033; x=1692011833; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=48waxWZGd1WUnLYaDrTSxvJywKXLcopaiUkWgt7j5Rg=; b=IF5FMf6vfUKWXKquwpCQEDXlMw21VPTq0vQh30bzDQAe43NcnPpm7+3Lc8a3CIJRpA 3D5+DTGp/GVVz7K0qnRkJHp3ElWCuX/V5mJLE2CMMPVLrH696jMkWhUZV5knoMheDkE7 LNxcBFVMjsAliYNw3/qsjltVAMCexO3SFZuMneEunxblALcqU49wFlwUCGkH4chcrTm+ Mu+nFly5hda7TWhSn6s/LaVQ5cZernQQxFJBPj8H2QEyQDfBEaIAKgcH8kpChkzLsY8n h49b3nM+GUF7t0uuu7NHoFu5rdBXy5wqqQ2n0YE+hiJT0Y6kOYKfZmJPFvsrDsGv9xrG NHZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407033; x=1692011833; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=48waxWZGd1WUnLYaDrTSxvJywKXLcopaiUkWgt7j5Rg=; b=CJInlGOIZBPLfuRbstYBgKcXtwpisUdurwM+57usxiKP2zrn1N+BGTNexKUFcRL9Z6 8j1JtV+wi5Iw8DWZQcn9r3DeIX4JsMdBgItzarrJ3qWlAlCuAbEpPDRG6MnYX3odNEop zTrScA6mXSjwvczOjQEqipXbNqgjqzKEN39W26ZKTNJdQy/6W349haiwP9x4aOCAtD4/ fPwqjG2NPUjxCD35mPHMNGmFlge9yp06QTqFsCEiqj2CFZ9wFJ59KrMQfffBRSOe5pfC TvlpaSoX1b8vMzAxiG3pPyWMiD9cBOke+YI7tUyttFVyRkBkF5gc4pF1A8f6/KX1X5bT hQJQ== X-Gm-Message-State: ABy/qLa8nfa1x2RLwZM9XYJ/cWLkCMuxeoSJ9fl0shZ4nyXaf44qLR8/ JKw9HYyqTma+hSx1s8krrBYOMQ== X-Google-Smtp-Source: APBJJlHbn14CvO5TR8loNSEkHloCg3xrbjPIwtza5v7TtzUnsc09AI3fvHMVCyYd3DTpdbD1pcNBzw== X-Received: by 2002:a17:90a:4104:b0:25c:1ad3:a4a1 with SMTP id u4-20020a17090a410400b0025c1ad3a4a1mr24600948pjf.1.1691407032801; Mon, 07 Aug 2023 04:17:12 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.17.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:17:12 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 34/48] jbd2,ext4: dynamically allocate the jbd2-journal shrinker Date: Mon, 7 Aug 2023 19:09:22 +0800 Message-Id: <20230807110936.21819-35-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the jbd2-journal shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct journal_s. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/jbd2/journal.c | 27 +++++++++++++++++---------- include/linux/jbd2.h | 2 +- 2 files changed, 18 insertions(+), 11 deletions(-) diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 1b5a45ab62b0..4c421da03fee 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1298,7 +1298,7 @@ static int jbd2_min_tag_size(void) static unsigned long jbd2_journal_shrink_scan(struct shrinker *shrink, struct shrink_control *sc) { - journal_t *journal = container_of(shrink, journal_t, j_shrinker); + journal_t *journal = shrink->private_data; unsigned long nr_to_scan = sc->nr_to_scan; unsigned long nr_shrunk; unsigned long count; @@ -1324,7 +1324,7 @@ static unsigned long jbd2_journal_shrink_scan(struct shrinker *shrink, static unsigned long jbd2_journal_shrink_count(struct shrinker *shrink, struct shrink_control *sc) { - journal_t *journal = container_of(shrink, journal_t, j_shrinker); + journal_t *journal = shrink->private_data; unsigned long count; count = percpu_counter_read_positive(&journal->j_checkpoint_jh_count); @@ -1412,19 +1412,26 @@ static journal_t *journal_init_common(struct block_device *bdev, journal->j_superblock = (journal_superblock_t *)bh->b_data; journal->j_shrink_transaction = NULL; - journal->j_shrinker.scan_objects = jbd2_journal_shrink_scan; - journal->j_shrinker.count_objects = jbd2_journal_shrink_count; - journal->j_shrinker.seeks = DEFAULT_SEEKS; - journal->j_shrinker.batch = journal->j_max_transaction_buffers; if (percpu_counter_init(&journal->j_checkpoint_jh_count, 0, GFP_KERNEL)) goto err_cleanup; - if (register_shrinker(&journal->j_shrinker, "jbd2-journal:(%u:%u)", - MAJOR(bdev->bd_dev), MINOR(bdev->bd_dev))) { + journal->j_shrinker = shrinker_alloc(0, "jbd2-journal:(%u:%u)", + MAJOR(bdev->bd_dev), + MINOR(bdev->bd_dev)); + if (!journal->j_shrinker) { percpu_counter_destroy(&journal->j_checkpoint_jh_count); goto err_cleanup; } + + journal->j_shrinker->scan_objects = jbd2_journal_shrink_scan; + journal->j_shrinker->count_objects = jbd2_journal_shrink_count; + journal->j_shrinker->seeks = DEFAULT_SEEKS; + journal->j_shrinker->batch = journal->j_max_transaction_buffers; + journal->j_shrinker->private_data = journal; + + shrinker_register(journal->j_shrinker); + return journal; err_cleanup: @@ -2187,9 +2194,9 @@ int jbd2_journal_destroy(journal_t *journal) brelse(journal->j_sb_buffer); } - if (journal->j_shrinker.flags & SHRINKER_REGISTERED) { + if (journal->j_shrinker) { percpu_counter_destroy(&journal->j_checkpoint_jh_count); - unregister_shrinker(&journal->j_shrinker); + shrinker_free(journal->j_shrinker); } if (journal->j_proc_entry) jbd2_stats_proc_exit(journal); diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index 44c298aa58d4..beb4c4586320 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -891,7 +891,7 @@ struct journal_s * Journal head shrinker, reclaim buffer's journal head which * has been written back. */ - struct shrinker j_shrinker; + struct shrinker *j_shrinker; /** * @j_checkpoint_jh_count: From patchwork Mon Aug 7 11:09:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711221 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0D60C04E69 for ; Mon, 7 Aug 2023 11:33:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232775AbjHGLdp (ORCPT ); Mon, 7 Aug 2023 07:33:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233018AbjHGLdD (ORCPT ); Mon, 7 Aug 2023 07:33:03 -0400 Received: from mail-yb1-xb2f.google.com (mail-yb1-xb2f.google.com [IPv6:2607:f8b0:4864:20::b2f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28E232D6B for ; Mon, 7 Aug 2023 04:29:56 -0700 (PDT) Received: by mail-yb1-xb2f.google.com with SMTP id 3f1490d57ef6-d4dc443d838so177464276.1 for ; Mon, 07 Aug 2023 04:29:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407752; x=1692012552; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=v5vYJ8kE3O6JXdLxdEEyUgUMjz4KJqSKKSB151wqkNo=; b=YuRtvvSY2hn75iTwT32ZU4RkQNOI4IWYhFzLgIygyOUc9mzHN0bAzGsWvR1t24H0ky kZlUeREfbuBa5r//oCLMCMr2wM8dBpvuLCplyWDe1DHrSNN3bPiMyA/PrTw9FrbP3XFu D8m1UPn0htpP6amlO+VCO4+na1n+LxVfvoMMQHX4Qgb+TxgyLy8mfHlYVu/7tSkLQP5Z lfRFZGDCDlfOr9zUeRwbGilzXAvyLTmTsoG/YQpTfmV2XxNoDG5Asn8KxVWx2SBU5uxr Tu7J6M789mSm3RVMrYHtmIwHSL7PEgXr4NdDRl81naqZ+pz9KgN2IybU8/YGCmPKk0GW 9KSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407752; x=1692012552; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=v5vYJ8kE3O6JXdLxdEEyUgUMjz4KJqSKKSB151wqkNo=; b=dyNC3I/n6SWLeqPD4QXUz4ayA+tb8lI72hmroiOBWvWZ/BHe1ZO3wKujM1e48ubQYX KLVoHu6aZ5zj7/be/m6Hlnjvzy7aonv+RpLUcr2Mj6JZqNZMYpw1Z5cV5XDtw0uUy4gX OxMpzL3UYTpOLp6AuiyjpucZUBhW6JGcPObnqho7rcX5IUjEpeAC9nMFQ/qJbDElZxay cJAf6uCUj4usJLKL434J55kdR/21CM56xUDHXU3JMH5nBa12HZO23O5wJArRVUWBoLrO Oem96OxWVY63GSrGDKpnaeevZ/t+8YvMrVm2HmWRkVpwiAY+U5GBigBTyUYPigNrOI8J xsvQ== X-Gm-Message-State: ABy/qLY91GzESn6ekaOIdKEl0RS0UKm9nPUB8dGeem6JPBsGxqbWKlYX 2gvr9CDd5iZBANhbGrFtP/N5mpozjdpaWp1qamY= X-Google-Smtp-Source: APBJJlFyAF6s6JefOZNl/scuUGwKU5q0BmH7yK6Qf+JZ3E1mrAS2lh5NuGQm2RRGuEVfms4+14afyQ== X-Received: by 2002:a17:90a:3f08:b0:268:1e3b:14c9 with SMTP id l8-20020a17090a3f0800b002681e3b14c9mr23486908pjc.2.1691407045970; Mon, 07 Aug 2023 04:17:25 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.17.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:17:25 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Chuck Lever , Jeff Layton Subject: [PATCH v4 35/48] nfsd: dynamically allocate the nfsd-client shrinker Date: Mon, 7 Aug 2023 19:09:23 +0800 Message-Id: <20230807110936.21819-36-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the nfsd-client shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct nfsd_net. Signed-off-by: Qi Zheng Acked-by: Chuck Lever Acked-by: Jeff Layton --- fs/nfsd/netns.h | 2 +- fs/nfsd/nfs4state.c | 20 ++++++++++++-------- 2 files changed, 13 insertions(+), 9 deletions(-) diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index ec49b200b797..f669444d5336 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -195,7 +195,7 @@ struct nfsd_net { int nfs4_max_clients; atomic_t nfsd_courtesy_clients; - struct shrinker nfsd_client_shrinker; + struct shrinker *nfsd_client_shrinker; struct work_struct nfsd_shrinker_work; }; diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 8534693eb6a4..9e401db8a6d2 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -4400,8 +4400,7 @@ static unsigned long nfsd4_state_shrinker_count(struct shrinker *shrink, struct shrink_control *sc) { int count; - struct nfsd_net *nn = container_of(shrink, - struct nfsd_net, nfsd_client_shrinker); + struct nfsd_net *nn = shrink->private_data; count = atomic_read(&nn->nfsd_courtesy_clients); if (!count) @@ -8149,12 +8148,17 @@ static int nfs4_state_create_net(struct net *net) INIT_WORK(&nn->nfsd_shrinker_work, nfsd4_state_shrinker_worker); get_net(net); - nn->nfsd_client_shrinker.scan_objects = nfsd4_state_shrinker_scan; - nn->nfsd_client_shrinker.count_objects = nfsd4_state_shrinker_count; - nn->nfsd_client_shrinker.seeks = DEFAULT_SEEKS; - - if (register_shrinker(&nn->nfsd_client_shrinker, "nfsd-client")) + nn->nfsd_client_shrinker = shrinker_alloc(0, "nfsd-client"); + if (!nn->nfsd_client_shrinker) goto err_shrinker; + + nn->nfsd_client_shrinker->scan_objects = nfsd4_state_shrinker_scan; + nn->nfsd_client_shrinker->count_objects = nfsd4_state_shrinker_count; + nn->nfsd_client_shrinker->seeks = DEFAULT_SEEKS; + nn->nfsd_client_shrinker->private_data = nn; + + shrinker_register(nn->nfsd_client_shrinker); + return 0; err_shrinker: @@ -8252,7 +8256,7 @@ nfs4_state_shutdown_net(struct net *net) struct list_head *pos, *next, reaplist; struct nfsd_net *nn = net_generic(net, nfsd_net_id); - unregister_shrinker(&nn->nfsd_client_shrinker); + shrinker_free(nn->nfsd_client_shrinker); cancel_work(&nn->nfsd_shrinker_work); cancel_delayed_work_sync(&nn->laundromat_work); locks_end_grace(&nn->nfsd4_manager); From patchwork Mon Aug 7 11:09:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712894 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56FFBC04A94 for ; Mon, 7 Aug 2023 11:22:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232475AbjHGLWW (ORCPT ); Mon, 7 Aug 2023 07:22:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59214 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232349AbjHGLVx (ORCPT ); Mon, 7 Aug 2023 07:21:53 -0400 Received: from mail-io1-xd2e.google.com (mail-io1-xd2e.google.com [IPv6:2607:f8b0:4864:20::d2e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 298041B1 for ; Mon, 7 Aug 2023 04:19:42 -0700 (PDT) Received: by mail-io1-xd2e.google.com with SMTP id ca18e2360f4ac-790b6761117so45138839f.0 for ; Mon, 07 Aug 2023 04:19:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407059; x=1692011859; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=f+7Rjo519K3FhaZ9jqPWNUITMom2L2BqSXFVMuCYJXE=; b=ip0wYuQW2+/exFbWgV8xiqSMo5oTQ+OAdV6N1Ar0LEuRT0eIq620KDbMvERQspVuIX AL+wevZXKdon9YRPQjclhoX9H3SrxByFFe9jR5690ffz3lESe4Q0ZFhT9ousgzw0xt/w 5RRxxYEFUQ/KP/U5y/hPXXWHBw2c8mi1xHmKIZ7mZeQKJVTuYBj/qteoNFG9SyZ1tjUE RbAUg65PVJJ+WhDtWwqZYb434jDUE36PynN0DkYIbM09s/1BNwwPxkk2HM9wFLeNzyaL lqpAqgXw+Mhtz5SgHNy0c1hVzxk4Y6rOc9m8zwrbUN+lDejRoW7+lKGMq2jSF6Ub2+cH D5RA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407059; x=1692011859; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=f+7Rjo519K3FhaZ9jqPWNUITMom2L2BqSXFVMuCYJXE=; b=QGfgFe8yu8pSmgu0cukZBbvDlwNbn3VyYObJFbZCnw0tJtyUqJOlQ60u1HXwB5LDIH kZu39ViSCrYW5NEkIHb6VGNk1rDU3fLSXPuoDWU+BS5StIXPjuVtkl6SN6HInTE9XdOX yn2ZGFzzx+aWyDBTTuh8tLZ4AYbVrVcyw9LJ5FWxbN8M8pmLZwwC3xMPsKf6LeiAbq77 2o3LWymXH61OfesLozO/tF9xAjArwl9X0KMp4BXtvL1I28Djrs/nOvUmrHLJFoiPpUFP GTC4sFwTmNJ2waUdYpIKYqKcCXSSeVGlCbIwlkSxdxpfwZfctG4ZHCiZCFhrWvxDVaK4 NS1A== X-Gm-Message-State: ABy/qLZRkP3yYHhbsnAzfKUXNbf+9bOhfeSUZGB3fcs1vTXEhBciBZ7N LTQUj/Y/zyk3+oqHCB3ND6tTLA== X-Google-Smtp-Source: APBJJlEqWtJMEzUOeETqs91YS6OhZnccr6gvE839NK54utINPmY3rqSAbE5saT2wFNMSrRFNpkUXNA== X-Received: by 2002:a05:6e02:8ef:b0:349:1d60:7250 with SMTP id n15-20020a056e0208ef00b003491d607250mr23020165ilt.0.1691407058833; Mon, 07 Aug 2023 04:17:38 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.17.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:17:38 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Chuck Lever , Jeff Layton Subject: [PATCH v4 36/48] nfsd: dynamically allocate the nfsd-reply shrinker Date: Mon, 7 Aug 2023 19:09:24 +0800 Message-Id: <20230807110936.21819-37-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the nfsd-reply shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct nfsd_net. Signed-off-by: Qi Zheng Acked-by: Chuck Lever Acked-by: Jeff Layton --- fs/nfsd/netns.h | 2 +- fs/nfsd/nfscache.c | 31 ++++++++++++++++--------------- 2 files changed, 17 insertions(+), 16 deletions(-) diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index f669444d5336..ab303a8b77d5 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -177,7 +177,7 @@ struct nfsd_net { /* size of cache when we saw the longest hash chain */ unsigned int longest_chain_cachesize; - struct shrinker nfsd_reply_cache_shrinker; + struct shrinker *nfsd_reply_cache_shrinker; /* tracking server-to-server copy mounts */ spinlock_t nfsd_ssc_lock; diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index 80621a709510..fd56a52aa5fb 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -201,26 +201,29 @@ int nfsd_reply_cache_init(struct nfsd_net *nn) { unsigned int hashsize; unsigned int i; - int status = 0; nn->max_drc_entries = nfsd_cache_size_limit(); atomic_set(&nn->num_drc_entries, 0); hashsize = nfsd_hashsize(nn->max_drc_entries); nn->maskbits = ilog2(hashsize); - nn->nfsd_reply_cache_shrinker.scan_objects = nfsd_reply_cache_scan; - nn->nfsd_reply_cache_shrinker.count_objects = nfsd_reply_cache_count; - nn->nfsd_reply_cache_shrinker.seeks = 1; - status = register_shrinker(&nn->nfsd_reply_cache_shrinker, - "nfsd-reply:%s", nn->nfsd_name); - if (status) - return status; - nn->drc_hashtbl = kvzalloc(array_size(hashsize, sizeof(*nn->drc_hashtbl)), GFP_KERNEL); if (!nn->drc_hashtbl) + return -ENOMEM; + + nn->nfsd_reply_cache_shrinker = shrinker_alloc(0, "nfsd-reply:%s", + nn->nfsd_name); + if (!nn->nfsd_reply_cache_shrinker) goto out_shrinker; + nn->nfsd_reply_cache_shrinker->scan_objects = nfsd_reply_cache_scan; + nn->nfsd_reply_cache_shrinker->count_objects = nfsd_reply_cache_count; + nn->nfsd_reply_cache_shrinker->seeks = 1; + nn->nfsd_reply_cache_shrinker->private_data = nn; + + shrinker_register(nn->nfsd_reply_cache_shrinker); + for (i = 0; i < hashsize; i++) { INIT_LIST_HEAD(&nn->drc_hashtbl[i].lru_head); spin_lock_init(&nn->drc_hashtbl[i].cache_lock); @@ -229,7 +232,7 @@ int nfsd_reply_cache_init(struct nfsd_net *nn) return 0; out_shrinker: - unregister_shrinker(&nn->nfsd_reply_cache_shrinker); + kvfree(nn->drc_hashtbl); printk(KERN_ERR "nfsd: failed to allocate reply cache\n"); return -ENOMEM; } @@ -239,7 +242,7 @@ void nfsd_reply_cache_shutdown(struct nfsd_net *nn) struct nfsd_cacherep *rp; unsigned int i; - unregister_shrinker(&nn->nfsd_reply_cache_shrinker); + shrinker_free(nn->nfsd_reply_cache_shrinker); for (i = 0; i < nn->drc_hashsize; i++) { struct list_head *head = &nn->drc_hashtbl[i].lru_head; @@ -323,8 +326,7 @@ nfsd_prune_bucket_locked(struct nfsd_net *nn, struct nfsd_drc_bucket *b, static unsigned long nfsd_reply_cache_count(struct shrinker *shrink, struct shrink_control *sc) { - struct nfsd_net *nn = container_of(shrink, - struct nfsd_net, nfsd_reply_cache_shrinker); + struct nfsd_net *nn = shrink->private_data; return atomic_read(&nn->num_drc_entries); } @@ -343,8 +345,7 @@ nfsd_reply_cache_count(struct shrinker *shrink, struct shrink_control *sc) static unsigned long nfsd_reply_cache_scan(struct shrinker *shrink, struct shrink_control *sc) { - struct nfsd_net *nn = container_of(shrink, - struct nfsd_net, nfsd_reply_cache_shrinker); + struct nfsd_net *nn = shrink->private_data; unsigned long freed = 0; LIST_HEAD(dispose); unsigned int i; From patchwork Mon Aug 7 11:09:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712882 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD123EB64DD for ; Mon, 7 Aug 2023 11:38:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233019AbjHGLi6 (ORCPT ); Mon, 7 Aug 2023 07:38:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233399AbjHGLia (ORCPT ); Mon, 7 Aug 2023 07:38:30 -0400 Received: from mail-io1-xd2e.google.com (mail-io1-xd2e.google.com [IPv6:2607:f8b0:4864:20::d2e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C78E6558F for ; Mon, 7 Aug 2023 04:35:32 -0700 (PDT) Received: by mail-io1-xd2e.google.com with SMTP id ca18e2360f4ac-7748ca56133so28749439f.0 for ; Mon, 07 Aug 2023 04:35:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691408076; x=1692012876; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jaqVlo27zysQOw4inLaa7RWYi61naAqQm5GJ5upJpN4=; b=UvZYtwPZWq4xCWxThTvjT5F5LM+HJ0WTY96MYD4SQbHO04/MAiX+VSWBYjmVuywdmv bspjSWpM7jfw1V0dZ3zbPLU/HnjQF/VWv+vEF9bCDDxSgnSTwZG8gCpABAy7n7ZdrurW 7gzOSSPLuaEGUsjfiNHJNaU6yxNVsugs2PbPyOOsYT9lFt9zzUBvo0ylS0Ttsr5HISmv lPfKczICs3DfyjBEUZw2msqxZqfN4nG3wEj4g9dV/lN6rBwy9QaqM+lDUjDL4mddzqKm fyowQ/23EGVpIuOPAXj/xJAzUX3Vsl3p39mOnp0LEaOcXM2cyUr12O7Ux2ygtrnv1J6T G8Qg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691408076; x=1692012876; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jaqVlo27zysQOw4inLaa7RWYi61naAqQm5GJ5upJpN4=; b=cixivyaSwOZ6rCtQHkr0jWFHTOgJPXgjIzMQlTADlyYuMPafE7W3/PZ3B/91mNf0A2 I4ncg0b/TeTyWrPkOC5R6h9jsxXCwyV2SAo5QNCWcyxrYUHZlN0tccKwcUkdLYw4Gy7a +sNCmg7oKn/fDOZx9lj04S6571bt0b8fDAb74QzdtC89Fo8m8T2pcTqmzT+BDiIEvX/A vRydFb78HE6B0RLqzYsc/kxtGGZP/X8Y8Pq9eIIAeTrbjzdsDWNQNbfjrZ2BK5FUJSAJ LlKwiiJ3DkYcnZz2d97Akkrfzs3+/gRoPrcdI4/vDuGNhbONO9yXifiWJHeyCuyVgz1F sjhw== X-Gm-Message-State: ABy/qLbsNna+jEmyDViT1+Kyx/DO5RMY+GrANrd2Ul485zhaSDLpE8lK GNidr6d9+OztKLHV41GIS+0hB/UIgiQNoYm8Rno= X-Google-Smtp-Source: AGHT+IHBSjfm4qMxfKY1o30DsQrf62j+YLyyzQgOSjZX7MvZKQZkongUtrzUOFN5xrnWaoCKIehpOA== X-Received: by 2002:a17:90a:9c3:b0:269:41cf:7212 with SMTP id 61-20020a17090a09c300b0026941cf7212mr4969668pjo.4.1691407071669; Mon, 07 Aug 2023 04:17:51 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.17.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:17:51 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 37/48] xfs: dynamically allocate the xfs-buf shrinker Date: Mon, 7 Aug 2023 19:09:25 +0800 Message-Id: <20230807110936.21819-38-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the xfs-buf shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct xfs_buftarg. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/xfs/xfs_buf.c | 25 ++++++++++++++----------- fs/xfs/xfs_buf.h | 2 +- 2 files changed, 15 insertions(+), 12 deletions(-) diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index 15d1e5a7c2d3..715730fc91cb 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -1906,8 +1906,7 @@ xfs_buftarg_shrink_scan( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_buftarg *btp = container_of(shrink, - struct xfs_buftarg, bt_shrinker); + struct xfs_buftarg *btp = shrink->private_data; LIST_HEAD(dispose); unsigned long freed; @@ -1929,8 +1928,7 @@ xfs_buftarg_shrink_count( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_buftarg *btp = container_of(shrink, - struct xfs_buftarg, bt_shrinker); + struct xfs_buftarg *btp = shrink->private_data; return list_lru_shrink_count(&btp->bt_lru, sc); } @@ -1938,7 +1936,7 @@ void xfs_free_buftarg( struct xfs_buftarg *btp) { - unregister_shrinker(&btp->bt_shrinker); + shrinker_free(btp->bt_shrinker); ASSERT(percpu_counter_sum(&btp->bt_io_count) == 0); percpu_counter_destroy(&btp->bt_io_count); list_lru_destroy(&btp->bt_lru); @@ -2021,13 +2019,18 @@ xfs_alloc_buftarg( if (percpu_counter_init(&btp->bt_io_count, 0, GFP_KERNEL)) goto error_lru; - btp->bt_shrinker.count_objects = xfs_buftarg_shrink_count; - btp->bt_shrinker.scan_objects = xfs_buftarg_shrink_scan; - btp->bt_shrinker.seeks = DEFAULT_SEEKS; - btp->bt_shrinker.flags = SHRINKER_NUMA_AWARE; - if (register_shrinker(&btp->bt_shrinker, "xfs-buf:%s", - mp->m_super->s_id)) + btp->bt_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE, "xfs-buf:%s", + mp->m_super->s_id); + if (!btp->bt_shrinker) goto error_pcpu; + + btp->bt_shrinker->count_objects = xfs_buftarg_shrink_count; + btp->bt_shrinker->scan_objects = xfs_buftarg_shrink_scan; + btp->bt_shrinker->seeks = DEFAULT_SEEKS; + btp->bt_shrinker->private_data = btp; + + shrinker_register(btp->bt_shrinker); + return btp; error_pcpu: diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h index 549c60942208..4e6969a675f7 100644 --- a/fs/xfs/xfs_buf.h +++ b/fs/xfs/xfs_buf.h @@ -102,7 +102,7 @@ typedef struct xfs_buftarg { size_t bt_logical_sectormask; /* LRU control structures */ - struct shrinker bt_shrinker; + struct shrinker *bt_shrinker; struct list_lru bt_lru; struct percpu_counter bt_io_count; From patchwork Mon Aug 7 11:09:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711232 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 291DEEB64DD for ; Mon, 7 Aug 2023 11:20:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232305AbjHGLUz (ORCPT ); Mon, 7 Aug 2023 07:20:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52934 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232301AbjHGLUb (ORCPT ); Mon, 7 Aug 2023 07:20:31 -0400 Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B166A83 for ; Mon, 7 Aug 2023 04:19:00 -0700 (PDT) Received: by mail-pj1-x102c.google.com with SMTP id 98e67ed59e1d1-2690803a368so591346a91.1 for ; Mon, 07 Aug 2023 04:19:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407084; x=1692011884; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=vAE6p5mA5n3yxm+4IPfXfMLc8MGv4J5wg3qHubren08=; b=J9sRUnLVr/1gRDCZ8z/wUaEuDmB5tyJkvTgo3ljho94pxMvUbNxIs6BrAr5OvjDeBd NlwSsbr2CKM03GvossTeyaJQF+TsD29ATXSWWvjw7Kcrs+m5LHvK9yHheRdx6ItlS6Ki yb6ebrPqrWzCUCYAOoHHLe8DTcWnRGuK8IbRkKFIstk7vHG8sx3yXUkwwQ7Mu6THuK5U s7cxqSXTHpGPngOLWfQooqg5Gbhqn2y84s5NSz7JvKiqnrRjOpTq1zeDW5zGBhCfHp8b AvjxYc2lq/KA07E2LvbgtvS8QM8QXYSNfper7Sm+pyp3P6HdBQtVhRokTkSwmgm01BsE Ay4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407084; x=1692011884; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=vAE6p5mA5n3yxm+4IPfXfMLc8MGv4J5wg3qHubren08=; b=HGvlid/0mrm0k9CuwPZgWjnD8SrmfKlW8ZRWvBKBwTdfhDxyy1svVvA9P2anwqYL9p Sm7zn/IdhERQTfwq3UeGM8n0SNlXIQ9C0745sNWQz3mGziWdhc0j1jrs5JRnDTCnk4sx Lc00kVv+kNHTAr7LEZvD6DbxniBsAzTpPcj4ZTwEoacZD3kTOsbdsQ6Z79eKiM1ynm6s +vZEeIsSg8NM76LFtN40oAkFnuFpDqT2FpNKn3Q+kP3Cyx1SYzdFjiwk7VrfHwhbnZnt 9+wQtCYW32t1cgn7Bu79A7KdAq21pOczdJ1fJYg5vND/bbESyzqYHctmk/LXSzsyJ3oa a+1g== X-Gm-Message-State: AOJu0YwclAuWmlhghBS+HWgbfZclXLywUHmDelIAST99F3P9K2qZ1Aok nxSwJwz2itsZQGT31KkZ7B/aMg== X-Google-Smtp-Source: AGHT+IEh5Yyc2UkocOBP861I39wck8cTfExcJN4mGltuRpL51+0K+Rth+2UxJEat5gVmOs+WZ1XBzA== X-Received: by 2002:a17:90a:648:b0:269:60ed:d493 with SMTP id q8-20020a17090a064800b0026960edd493mr1826843pje.4.1691407084214; Mon, 07 Aug 2023 04:18:04 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.17.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:18:03 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 38/48] xfs: dynamically allocate the xfs-inodegc shrinker Date: Mon, 7 Aug 2023 19:09:26 +0800 Message-Id: <20230807110936.21819-39-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the xfs-inodegc shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct xfs_mount. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/xfs/xfs_icache.c | 26 +++++++++++++++----------- fs/xfs/xfs_mount.c | 4 ++-- fs/xfs/xfs_mount.h | 2 +- 3 files changed, 18 insertions(+), 14 deletions(-) diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c index 453890942d9f..751c380afd5a 100644 --- a/fs/xfs/xfs_icache.c +++ b/fs/xfs/xfs_icache.c @@ -2225,8 +2225,7 @@ xfs_inodegc_shrinker_count( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_mount *mp = container_of(shrink, struct xfs_mount, - m_inodegc_shrinker); + struct xfs_mount *mp = shrink->private_data; struct xfs_inodegc *gc; int cpu; @@ -2247,8 +2246,7 @@ xfs_inodegc_shrinker_scan( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_mount *mp = container_of(shrink, struct xfs_mount, - m_inodegc_shrinker); + struct xfs_mount *mp = shrink->private_data; struct xfs_inodegc *gc; int cpu; bool no_items = true; @@ -2284,13 +2282,19 @@ int xfs_inodegc_register_shrinker( struct xfs_mount *mp) { - struct shrinker *shrink = &mp->m_inodegc_shrinker; + mp->m_inodegc_shrinker = shrinker_alloc(SHRINKER_NONSLAB, + "xfs-inodegc:%s", + mp->m_super->s_id); + if (!mp->m_inodegc_shrinker) + return -ENOMEM; + + mp->m_inodegc_shrinker->count_objects = xfs_inodegc_shrinker_count; + mp->m_inodegc_shrinker->scan_objects = xfs_inodegc_shrinker_scan; + mp->m_inodegc_shrinker->seeks = 0; + mp->m_inodegc_shrinker->batch = XFS_INODEGC_SHRINKER_BATCH; + mp->m_inodegc_shrinker->private_data = mp; - shrink->count_objects = xfs_inodegc_shrinker_count; - shrink->scan_objects = xfs_inodegc_shrinker_scan; - shrink->seeks = 0; - shrink->flags = SHRINKER_NONSLAB; - shrink->batch = XFS_INODEGC_SHRINKER_BATCH; + shrinker_register(mp->m_inodegc_shrinker); - return register_shrinker(shrink, "xfs-inodegc:%s", mp->m_super->s_id); + return 0; } diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index fb87ffb48f7f..640d09891a4e 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -1018,7 +1018,7 @@ xfs_mountfs( out_log_dealloc: xfs_log_mount_cancel(mp); out_inodegc_shrinker: - unregister_shrinker(&mp->m_inodegc_shrinker); + shrinker_free(mp->m_inodegc_shrinker); out_fail_wait: if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) xfs_buftarg_drain(mp->m_logdev_targp); @@ -1100,7 +1100,7 @@ xfs_unmountfs( #if defined(DEBUG) xfs_errortag_clearall(mp); #endif - unregister_shrinker(&mp->m_inodegc_shrinker); + shrinker_free(mp->m_inodegc_shrinker); xfs_free_perag(mp); xfs_errortag_del(mp); diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index e2866e7fa60c..562c294ca08e 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -217,7 +217,7 @@ typedef struct xfs_mount { atomic_t m_agirotor; /* last ag dir inode alloced */ /* Memory shrinker to throttle and reprioritize inodegc */ - struct shrinker m_inodegc_shrinker; + struct shrinker *m_inodegc_shrinker; /* * Workqueue item so that we can coalesce multiple inode flush attempts * into a single flush. From patchwork Mon Aug 7 11:09:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711217 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9484C001DF for ; Mon, 7 Aug 2023 11:39:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233084AbjHGLj6 (ORCPT ); Mon, 7 Aug 2023 07:39:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47704 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232349AbjHGLjg (ORCPT ); Mon, 7 Aug 2023 07:39:36 -0400 Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28D531FDC for ; Mon, 7 Aug 2023 04:36:37 -0700 (PDT) Received: by mail-pf1-x432.google.com with SMTP id d2e1a72fcca58-6879986a436so694301b3a.0 for ; Mon, 07 Aug 2023 04:36:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691408145; x=1692012945; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=NbTnBXz1rftevvtnrJnbyUTbBXZHNhmRyJT9VBuSKEk=; b=HxS8qhdFnHMkbW/xwKN/+NnwjDML4APm0kUSzLtiCXTh2ooePNJTc3Bf2viOJmERUN K8v4HAG40iQF4GR/yjqh6FyDdJ02U/sfyaLbWLUcniGvirb6sEqaOKqfGW34cI84Vip/ mbSkj6+JinxtIaEgBMs0GXaDX0TcqJUv8NUI0eVukGC2EZBFtxnILSFSoWiTK4njHB4B LhXAZW1yc/IAjtd3PLfqtSlMoHy2aMEk9ZH09aQ/brdab27CaHS3Is3JsoPPjdziM1Ak 3dreoNuy7kQMHt8zs0bNPuuBp6Fco7soougTuCZNbo6DrBYSybiXED7JJ+Lc3g6kf0Ql Ry8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691408145; x=1692012945; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=NbTnBXz1rftevvtnrJnbyUTbBXZHNhmRyJT9VBuSKEk=; b=i1nraejkxI3CLoNYeKzmaQyAxgQ4rebMbbVvZkI9shKvyQ1z6a/WOB+UMGXyDUhCGx JbZhuW7CAecxwGk1hd08mR0eeOMoSawKUOStk2pYcbzhU1FuBSc2HsIR7l6kbtNGXVGx 6wm+d3RBC3v0lpwgGgHCuxaEZ5A6jFCfgu8EnZrRztGjX19qB+fjqCiXtrbnMQO0jLSU RCYGeuqLCO1VN8JaARxTDtU/Xt51Zh+34zWJXGPjifHw/nJ48E0egovGTziZoc+eThqu LjqUSbMSRzsHwSq/fE0bOUOq7n5FJgQeqIXI952SyimSoCpf7n/VgfxZKN5cQses20iz ZetA== X-Gm-Message-State: ABy/qLaZmiq6llJN/zlk82ugoT0WXYMbfRMMDhe4eQCA57SzdcPVtZ1G cRZfQB6Zrh9thigPThDEdAblD8tb4Y7gE6mDo7c= X-Google-Smtp-Source: APBJJlHEA3k+axkYWIvy1nHuTMRTEcDAAx3CbSXEmipYg83y/9axHDl54yrvmY4ExsXdwismqiSLfg== X-Received: by 2002:a17:90a:901:b0:268:3a31:3e4d with SMTP id n1-20020a17090a090100b002683a313e4dmr23078546pjn.2.1691407096844; Mon, 07 Aug 2023 04:18:16 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.18.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:18:16 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 39/48] xfs: dynamically allocate the xfs-qm shrinker Date: Mon, 7 Aug 2023 19:09:27 +0800 Message-Id: <20230807110936.21819-40-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the xfs-qm shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct xfs_quotainfo. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/xfs/xfs_qm.c | 28 +++++++++++++++------------- fs/xfs/xfs_qm.h | 2 +- 2 files changed, 16 insertions(+), 14 deletions(-) diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c index 6abcc34fafd8..15ba23f11271 100644 --- a/fs/xfs/xfs_qm.c +++ b/fs/xfs/xfs_qm.c @@ -504,8 +504,7 @@ xfs_qm_shrink_scan( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_quotainfo *qi = container_of(shrink, - struct xfs_quotainfo, qi_shrinker); + struct xfs_quotainfo *qi = shrink->private_data; struct xfs_qm_isolate isol; unsigned long freed; int error; @@ -539,8 +538,7 @@ xfs_qm_shrink_count( struct shrinker *shrink, struct shrink_control *sc) { - struct xfs_quotainfo *qi = container_of(shrink, - struct xfs_quotainfo, qi_shrinker); + struct xfs_quotainfo *qi = shrink->private_data; return list_lru_shrink_count(&qi->qi_lru, sc); } @@ -680,15 +678,19 @@ xfs_qm_init_quotainfo( if (XFS_IS_PQUOTA_ON(mp)) xfs_qm_set_defquota(mp, XFS_DQTYPE_PROJ, qinf); - qinf->qi_shrinker.count_objects = xfs_qm_shrink_count; - qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan; - qinf->qi_shrinker.seeks = DEFAULT_SEEKS; - qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE; - - error = register_shrinker(&qinf->qi_shrinker, "xfs-qm:%s", - mp->m_super->s_id); - if (error) + qinf->qi_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE, "xfs-qm:%s", + mp->m_super->s_id); + if (!qinf->qi_shrinker) { + error = -ENOMEM; goto out_free_inos; + } + + qinf->qi_shrinker->count_objects = xfs_qm_shrink_count; + qinf->qi_shrinker->scan_objects = xfs_qm_shrink_scan; + qinf->qi_shrinker->seeks = DEFAULT_SEEKS; + qinf->qi_shrinker->private_data = qinf; + + shrinker_register(qinf->qi_shrinker); return 0; @@ -718,7 +720,7 @@ xfs_qm_destroy_quotainfo( qi = mp->m_quotainfo; ASSERT(qi != NULL); - unregister_shrinker(&qi->qi_shrinker); + shrinker_free(qi->qi_shrinker); list_lru_destroy(&qi->qi_lru); xfs_qm_destroy_quotainos(qi); mutex_destroy(&qi->qi_tree_lock); diff --git a/fs/xfs/xfs_qm.h b/fs/xfs/xfs_qm.h index 9683f0457d19..d5c9fc4ba591 100644 --- a/fs/xfs/xfs_qm.h +++ b/fs/xfs/xfs_qm.h @@ -63,7 +63,7 @@ struct xfs_quotainfo { struct xfs_def_quota qi_usr_default; struct xfs_def_quota qi_grp_default; struct xfs_def_quota qi_prj_default; - struct shrinker qi_shrinker; + struct shrinker *qi_shrinker; /* Minimum and maximum quota expiration timestamp values. */ time64_t qi_expiry_min; From patchwork Mon Aug 7 11:09:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711230 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C693C04E69 for ; Mon, 7 Aug 2023 11:22:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232469AbjHGLWW (ORCPT ); Mon, 7 Aug 2023 07:22:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55068 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232425AbjHGLVy (ORCPT ); Mon, 7 Aug 2023 07:21:54 -0400 Received: from mail-pf1-x42a.google.com (mail-pf1-x42a.google.com [IPv6:2607:f8b0:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C453349C8 for ; Mon, 7 Aug 2023 04:19:46 -0700 (PDT) Received: by mail-pf1-x42a.google.com with SMTP id d2e1a72fcca58-6879986a436so691112b3a.0 for ; Mon, 07 Aug 2023 04:19:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407130; x=1692011930; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=WPvD0YF4yF0E/V3NMttF7YVdRMfLZcl9Qmy2whUD9jE=; b=Yg6a4S6mehHXIhA/E3Q0PULlhTuWFJSC8SWG/ILCbhPqbGJ8U3cHU65QLviP2uhCSR ke987jNZWT+a3VbYt/P1DUgM9FD1wtLVWjs4YqGi7wL9UN969N//fjHu7Rkuacu1ZEbO sFeuYSBirj1vU6Aez3+cRli6rr3FzSuKOsTGD5nakrWuQB36WrjrtJxQeYSa4UmVVrMq tEjrzN2rUSVI2KnkxDKKadqug/diUuotXTrmPvHlIfn7KMnJ2N4ofpYCVZnDktG3/MfP H/JiYp2ayTwMbJS4oFbWPQmVfg6fAwDGd0yXBB9tmAfXes07FpCOwOtAU5/rDHZG4Tu+ oWKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407130; x=1692011930; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=WPvD0YF4yF0E/V3NMttF7YVdRMfLZcl9Qmy2whUD9jE=; b=aIHI+uO3ShbHAKVf8s6f1ibzMToyB1bzEKj/pnyLNL9KND8c9+0ifgZTA7Nktoebmg l3FGLdumSRutWInDPlbn9fBDfICheN+WD3pzOZsF4Mu6y25gjCmAT8/vs0/rugg0E/lI GDgW72FNaQgBj9pmN6GEFTnsvhrPie0YDzgmkVe0vhF2TuqjlezOtD3NCQhSksMBGUKn 8kdkQgemKzbIxeFeE2VOBQt9dV5ISN0qdXBoECOsxGr4qBHtYt35TXWX27o3Mu7HgxKu f2au4qWBhAdOfPbZva0U9z/BXE7O9eN2x1JxfvrjpEAer3+2pfNmBtNIOQH8rQo7phZr yUSw== X-Gm-Message-State: ABy/qLagI1Zl7zj4AGhjrv8yaVP2gof+2YqriDn7PKxCqso0JPc1n4W9 4KUhw3elO1K+GGAG3G4oVF4Ttr8TMxyvEzYH0Ug= X-Google-Smtp-Source: APBJJlFnoOazdp9TvNa1Sdutczsv0h+KjLn+q+TQByEK163E+9f/k1cC7rmChP+7R75WsTDRsF4HxQ== X-Received: by 2002:a17:90a:901:b0:268:3a31:3e4d with SMTP id n1-20020a17090a090100b002683a313e4dmr23078917pjn.2.1691407109946; Mon, 07 Aug 2023 04:18:29 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.18.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:18:29 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 40/48] zsmalloc: dynamically allocate the mm-zspool shrinker Date: Mon, 7 Aug 2023 19:09:28 +0800 Message-Id: <20230807110936.21819-41-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the mm-zspool shrinker, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct zs_pool. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- mm/zsmalloc.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index b58f957429f0..1909234bb345 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -229,7 +229,7 @@ struct zs_pool { struct zs_pool_stats stats; /* Compact classes */ - struct shrinker shrinker; + struct shrinker *shrinker; #ifdef CONFIG_ZSMALLOC_STAT struct dentry *stat_dentry; @@ -2086,8 +2086,7 @@ static unsigned long zs_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc) { unsigned long pages_freed; - struct zs_pool *pool = container_of(shrinker, struct zs_pool, - shrinker); + struct zs_pool *pool = shrinker->private_data; /* * Compact classes and calculate compaction delta. @@ -2105,8 +2104,7 @@ static unsigned long zs_shrinker_count(struct shrinker *shrinker, int i; struct size_class *class; unsigned long pages_to_free = 0; - struct zs_pool *pool = container_of(shrinker, struct zs_pool, - shrinker); + struct zs_pool *pool = shrinker->private_data; for (i = ZS_SIZE_CLASSES - 1; i >= 0; i--) { class = pool->size_class[i]; @@ -2121,18 +2119,24 @@ static unsigned long zs_shrinker_count(struct shrinker *shrinker, static void zs_unregister_shrinker(struct zs_pool *pool) { - unregister_shrinker(&pool->shrinker); + shrinker_free(pool->shrinker); } static int zs_register_shrinker(struct zs_pool *pool) { - pool->shrinker.scan_objects = zs_shrinker_scan; - pool->shrinker.count_objects = zs_shrinker_count; - pool->shrinker.batch = 0; - pool->shrinker.seeks = DEFAULT_SEEKS; + pool->shrinker = shrinker_alloc(0, "mm-zspool:%s", pool->name); + if (!pool->shrinker) + return -ENOMEM; + + pool->shrinker->scan_objects = zs_shrinker_scan; + pool->shrinker->count_objects = zs_shrinker_count; + pool->shrinker->batch = 0; + pool->shrinker->seeks = DEFAULT_SEEKS; + pool->shrinker->private_data = pool; - return register_shrinker(&pool->shrinker, "mm-zspool:%s", - pool->name); + shrinker_register(pool->shrinker); + + return 0; } static int calculate_zspage_chain_size(int class_size) From patchwork Mon Aug 7 11:09:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711231 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA019EB64DD for ; Mon, 7 Aug 2023 11:22:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232453AbjHGLWU (ORCPT ); Mon, 7 Aug 2023 07:22:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58394 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230362AbjHGLVr (ORCPT ); Mon, 7 Aug 2023 07:21:47 -0400 Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 829DC46A8 for ; Mon, 7 Aug 2023 04:19:44 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-686f6231bdeso1246936b3a.1 for ; Mon, 07 Aug 2023 04:19:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407123; x=1692011923; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=AnO+VrCD4LojLy+8kmnCjGg0ZRt7Zy9NIxA02Cs4pZw=; b=PfEVKvTzBWRKzDZcOs/Fep65btb/5j6s3WDHceANi3UdyfyE1ZYJjj/ojCsgHi3Vd1 UnyiA9UJ+WO0skTyzkklbevZFVt0QM5P026zpV9irULg/dt9elBIaT9aO85mKj85kzSK 8BL7WAzqEgJCUSOrld3eSg+Xi6Bj/nVLlSU4qlnz3r3ovJoXr2T2o0DtWh8ePmCGKfhu 8HAbYH+dcq7rqiPTVsEp3knKk+0ZUdZ34RURzik4J4PgZDJhHLpdrzH5JSXxHECtRx3a erZSmwbY1m1zt8qE5RzbmfCM7KzyvNBKjG86UwibulZ8+wpz72tXfP+ENX4A3BoRP40M UhJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407123; x=1692011923; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=AnO+VrCD4LojLy+8kmnCjGg0ZRt7Zy9NIxA02Cs4pZw=; b=Xg2J2fdWA5lhkecjdIDH6kLxE2mHrbvdHiTYVCyPB3g1w8jKUrQn4JSl+AyObpnZdg Ciht4axqf2uQg4iNg9crFZVj6ZOgRbVHvoydjKbG54f/r1IEkAqzouKivPZN41VtQ1P5 AA2WqjUF35MRhgluns14gGaK6WmJRuyG4osjqjiGmhFY2cZqg4/h0DV0M+52+ocs7NDG 0J/wqejvdC7thHzN4cCq8bJEqZ/hl1YKiMTxa39avJeL9wZYw0aSmV9nwEYNMuL5TwjF eCI0jIuLL5MBs4cFrv+b2YyIQNUFAcgQ12YIlqh0FQn/iROdDFm11iIxSG0VOVums+JB ke/w== X-Gm-Message-State: ABy/qLbSxxcLGLWskprBgYfnbdfiFM6NiqJwMVjzDhZw/6lfis//v133 45/hwaFMmpaZ1QBSi005buKZrA== X-Google-Smtp-Source: APBJJlGN7o+mPwW+D250kL/E75whSiIFGnI9vIACxkViJa+uI/EkAzzWgkZZOw/GfOlqJQ+tGCA4bg== X-Received: by 2002:a17:90a:3f08:b0:268:1e3b:14c9 with SMTP id l8-20020a17090a3f0800b002681e3b14c9mr23489214pjc.2.1691407122942; Mon, 07 Aug 2023 04:18:42 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.18.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:18:42 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 41/48] fs: super: dynamically allocate the s_shrink Date: Mon, 7 Aug 2023 19:09:29 +0800 Message-Id: <20230807110936.21819-42-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In preparation for implementing lockless slab shrink, use new APIs to dynamically allocate the s_shrink, so that it can be freed asynchronously using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical section when releasing the struct super_block. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- fs/btrfs/super.c | 2 +- fs/kernfs/mount.c | 2 +- fs/proc/root.c | 2 +- fs/super.c | 34 +++++++++++++++++++--------------- include/linux/fs.h | 2 +- 5 files changed, 23 insertions(+), 19 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 5ca07b41b4cd..c6980fc6fe02 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1514,7 +1514,7 @@ static struct dentry *btrfs_mount_root(struct file_system_type *fs_type, snprintf(s->s_id, sizeof(s->s_id), "%pg", fs_devices->latest_dev->bdev); - shrinker_debugfs_rename(&s->s_shrink, "sb-%s:%s", fs_type->name, + shrinker_debugfs_rename(s->s_shrink, "sb-%s:%s", fs_type->name, s->s_id); fs_info->bdev_holder = s; error = btrfs_fill_super(s, fs_devices, data); diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c index c4bf26142eec..79b96e74a8a0 100644 --- a/fs/kernfs/mount.c +++ b/fs/kernfs/mount.c @@ -265,7 +265,7 @@ static int kernfs_fill_super(struct super_block *sb, struct kernfs_fs_context *k sb->s_time_gran = 1; /* sysfs dentries and inodes don't require IO to create */ - sb->s_shrink.seeks = 0; + sb->s_shrink->seeks = 0; /* get root inode, initialize and unlock it */ down_read(&kf_root->kernfs_rwsem); diff --git a/fs/proc/root.c b/fs/proc/root.c index 9191248f2dac..b55dbc70287b 100644 --- a/fs/proc/root.c +++ b/fs/proc/root.c @@ -188,7 +188,7 @@ static int proc_fill_super(struct super_block *s, struct fs_context *fc) s->s_stack_depth = FILESYSTEM_MAX_STACK_DEPTH; /* procfs dentries and inodes don't require IO to create */ - s->s_shrink.seeks = 0; + s->s_shrink->seeks = 0; pde_get(&proc_root); root_inode = proc_get_inode(s, &proc_root); diff --git a/fs/super.c b/fs/super.c index 2354bcab6fff..a28193045345 100644 --- a/fs/super.c +++ b/fs/super.c @@ -67,7 +67,7 @@ static unsigned long super_cache_scan(struct shrinker *shrink, long dentries; long inodes; - sb = container_of(shrink, struct super_block, s_shrink); + sb = shrink->private_data; /* * Deadlock avoidance. We may hold various FS locks, and we don't want @@ -120,7 +120,7 @@ static unsigned long super_cache_count(struct shrinker *shrink, struct super_block *sb; long total_objects = 0; - sb = container_of(shrink, struct super_block, s_shrink); + sb = shrink->private_data; /* * We don't call trylock_super() here as it is a scalability bottleneck, @@ -182,7 +182,7 @@ static void destroy_unused_super(struct super_block *s) security_sb_free(s); put_user_ns(s->s_user_ns); kfree(s->s_subtype); - free_prealloced_shrinker(&s->s_shrink); + shrinker_free(s->s_shrink); /* no delays needed */ destroy_super_work(&s->destroy_work); } @@ -259,16 +259,20 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags, s->s_time_min = TIME64_MIN; s->s_time_max = TIME64_MAX; - s->s_shrink.seeks = DEFAULT_SEEKS; - s->s_shrink.scan_objects = super_cache_scan; - s->s_shrink.count_objects = super_cache_count; - s->s_shrink.batch = 1024; - s->s_shrink.flags = SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE; - if (prealloc_shrinker(&s->s_shrink, "sb-%s", type->name)) + s->s_shrink = shrinker_alloc(SHRINKER_NUMA_AWARE | SHRINKER_MEMCG_AWARE, + "sb-%s", type->name); + if (!s->s_shrink) goto fail; - if (list_lru_init_memcg(&s->s_dentry_lru, &s->s_shrink)) + + s->s_shrink->seeks = DEFAULT_SEEKS; + s->s_shrink->scan_objects = super_cache_scan; + s->s_shrink->count_objects = super_cache_count; + s->s_shrink->batch = 1024; + s->s_shrink->private_data = s; + + if (list_lru_init_memcg(&s->s_dentry_lru, s->s_shrink)) goto fail; - if (list_lru_init_memcg(&s->s_inode_lru, &s->s_shrink)) + if (list_lru_init_memcg(&s->s_inode_lru, s->s_shrink)) goto fail; return s; @@ -326,7 +330,7 @@ void deactivate_locked_super(struct super_block *s) { struct file_system_type *fs = s->s_type; if (atomic_dec_and_test(&s->s_active)) { - unregister_shrinker(&s->s_shrink); + shrinker_free(s->s_shrink); fs->kill_sb(s); /* @@ -610,7 +614,7 @@ struct super_block *sget_fc(struct fs_context *fc, hlist_add_head(&s->s_instances, &s->s_type->fs_supers); spin_unlock(&sb_lock); get_filesystem(s->s_type); - register_shrinker_prepared(&s->s_shrink); + shrinker_register(s->s_shrink); return s; share_extant_sb: @@ -693,7 +697,7 @@ struct super_block *sget(struct file_system_type *type, hlist_add_head(&s->s_instances, &type->fs_supers); spin_unlock(&sb_lock); get_filesystem(type); - register_shrinker_prepared(&s->s_shrink); + shrinker_register(s->s_shrink); return s; } EXPORT_SYMBOL(sget); @@ -1312,7 +1316,7 @@ int setup_bdev_super(struct super_block *sb, int sb_flags, mutex_unlock(&bdev->bd_fsfreeze_mutex); snprintf(sb->s_id, sizeof(sb->s_id), "%pg", bdev); - shrinker_debugfs_rename(&sb->s_shrink, "sb-%s:%s", sb->s_type->name, + shrinker_debugfs_rename(sb->s_shrink, "sb-%s:%s", sb->s_type->name, sb->s_id); sb_set_blocksize(sb, block_size(bdev)); return 0; diff --git a/include/linux/fs.h b/include/linux/fs.h index 9515d3688f71..1464afd41164 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1263,7 +1263,7 @@ struct super_block { const struct dentry_operations *s_d_op; /* default d_op for dentries */ - struct shrinker s_shrink; /* per-sb shrinker handle */ + struct shrinker *s_shrink; /* per-sb shrinker handle */ /* Number of inodes with nlink == 0 but still referenced */ atomic_long_t s_remove_count; From patchwork Mon Aug 7 11:09:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711229 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E22C0C10F00 for ; Mon, 7 Aug 2023 11:24:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232587AbjHGLYB (ORCPT ); Mon, 7 Aug 2023 07:24:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58388 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232942AbjHGLXj (ORCPT ); Mon, 7 Aug 2023 07:23:39 -0400 Received: from mail-oa1-x32.google.com (mail-oa1-x32.google.com [IPv6:2001:4860:4864:20::32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 523864C1D for ; Mon, 7 Aug 2023 04:20:42 -0700 (PDT) Received: by mail-oa1-x32.google.com with SMTP id 586e51a60fabf-1bb5dda9fb7so674051fac.0 for ; Mon, 07 Aug 2023 04:20:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407156; x=1692011956; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=G6s8y0Dka4KE4srOwy3I0FSAaIGrcYmvE6JrVZfCpDs=; b=bg7aSX0kkU97cA9eD77TGFqjhWslIj/Bj9dDkH5OZpZZ4n3XbX2weP/a+R1QMFJGth zgrz2a0MM0G2yDjcSxdsjS5mrSR75H5wnr5gqN9rtxvoCboeeFpT9K0shCKCtGIrQrS2 1RV6rQqKvnkWV3nfucaex7U8UoywcceQG0g+DDX5SFzNIvxfUr2BoCvL4rLN833EQxvb slixk86zXTjNsWf+2Fz8fPbZ/ALIijG7Kf3xC/VKij89IwEaD3ouzutg+JA/A5/bJHZz xpRFhTRFZUVclODKa8arxtWuI+HiWAlJl2v//G45QqAZA366dJe+GKHSU7VVhspoOUZv bbGg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407156; x=1692011956; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=G6s8y0Dka4KE4srOwy3I0FSAaIGrcYmvE6JrVZfCpDs=; b=EC+sb7QZet8Y5XtB1Cad6kRM4wRdY8OlY/zKqxL9TBFVWHtTDdCpaE2k9TUx0qevfK /jjozYDNdYViWt6mGjJk/ZRZwgUdulGhaHJ6iHPQF6VHneVp+oFSB8dM3SHOlW3w6GO7 Rje9Q9nvje33eO/0Et/e4X+f53vibGCfYKnZYlw5z1vegv3r6p3nXuQ5t+XDoCjPztw2 aWt3B4pVNOYSWTzlXIuAIBQqtNBiiNM9VxziqUSmWd7W3E4P5ZDdl0HxwSSMVwc8K41h 9nHTRwjLHE7zfeDIjlv9TkFrthg/4vo8YT0P/S+yoXMdnMdXFUFx2vn+BAyM+bOD+atf xVLQ== X-Gm-Message-State: ABy/qLYW4uEFBYC9HJwLi4NvpsmI+UF4Ux69pg4rVgH1nrdVMoXm7OS0 qsTK7XRXcnyxTL2YzRKzimofq+zgP3mqaj5eyig= X-Google-Smtp-Source: APBJJlENzs/96m+S7UnwJhfsSEKfLFwoWHJhRek0zeax/GsXgLjOrIeuu6U5nntKJfSobDso4iAXPQ== X-Received: by 2002:a17:90a:1f83:b0:268:3dc6:f0c5 with SMTP id x3-20020a17090a1f8300b002683dc6f0c5mr25042984pja.0.1691407135598; Mon, 07 Aug 2023 04:18:55 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.18.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:18:55 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 42/48] mm: shrinker: remove old APIs Date: Mon, 7 Aug 2023 19:09:30 +0800 Message-Id: <20230807110936.21819-43-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Now no users are using the old APIs, just remove them. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- include/linux/shrinker.h | 7 -- mm/shrinker.c | 143 --------------------------------------- 2 files changed, 150 deletions(-) diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index cc23ff0aee20..c55c07c3f0cb 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -103,13 +103,6 @@ struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...); void shrinker_register(struct shrinker *shrinker); void shrinker_free(struct shrinker *shrinker); -extern int __printf(2, 3) prealloc_shrinker(struct shrinker *shrinker, - const char *fmt, ...); -extern void register_shrinker_prepared(struct shrinker *shrinker); -extern int __printf(2, 3) register_shrinker(struct shrinker *shrinker, - const char *fmt, ...); -extern void unregister_shrinker(struct shrinker *shrinker); -extern void free_prealloced_shrinker(struct shrinker *shrinker); extern void synchronize_shrinkers(void); #ifdef CONFIG_SHRINKER_DEBUG diff --git a/mm/shrinker.c b/mm/shrinker.c index 43a375f954f3..3ab301ff122d 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -651,149 +651,6 @@ void shrinker_free(struct shrinker *shrinker) } EXPORT_SYMBOL_GPL(shrinker_free); -/* - * Add a shrinker callback to be called from the vm. - */ -static int __prealloc_shrinker(struct shrinker *shrinker) -{ - unsigned int size; - int err; - - if (shrinker->flags & SHRINKER_MEMCG_AWARE) { - err = prealloc_memcg_shrinker(shrinker); - if (err != -ENOSYS) - return err; - - shrinker->flags &= ~SHRINKER_MEMCG_AWARE; - } - - size = sizeof(*shrinker->nr_deferred); - if (shrinker->flags & SHRINKER_NUMA_AWARE) - size *= nr_node_ids; - - shrinker->nr_deferred = kzalloc(size, GFP_KERNEL); - if (!shrinker->nr_deferred) - return -ENOMEM; - - return 0; -} - -#ifdef CONFIG_SHRINKER_DEBUG -int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - va_list ap; - int err; - - va_start(ap, fmt); - shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); - va_end(ap); - if (!shrinker->name) - return -ENOMEM; - - err = __prealloc_shrinker(shrinker); - if (err) { - kfree_const(shrinker->name); - shrinker->name = NULL; - } - - return err; -} -#else -int prealloc_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - return __prealloc_shrinker(shrinker); -} -#endif - -void free_prealloced_shrinker(struct shrinker *shrinker) -{ -#ifdef CONFIG_SHRINKER_DEBUG - kfree_const(shrinker->name); - shrinker->name = NULL; -#endif - if (shrinker->flags & SHRINKER_MEMCG_AWARE) { - down_write(&shrinker_rwsem); - unregister_memcg_shrinker(shrinker); - up_write(&shrinker_rwsem); - return; - } - - kfree(shrinker->nr_deferred); - shrinker->nr_deferred = NULL; -} - -void register_shrinker_prepared(struct shrinker *shrinker) -{ - down_write(&shrinker_rwsem); - list_add_tail(&shrinker->list, &shrinker_list); - shrinker->flags |= SHRINKER_REGISTERED; - shrinker_debugfs_add(shrinker); - up_write(&shrinker_rwsem); -} - -static int __register_shrinker(struct shrinker *shrinker) -{ - int err = __prealloc_shrinker(shrinker); - - if (err) - return err; - register_shrinker_prepared(shrinker); - return 0; -} - -#ifdef CONFIG_SHRINKER_DEBUG -int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - va_list ap; - int err; - - va_start(ap, fmt); - shrinker->name = kvasprintf_const(GFP_KERNEL, fmt, ap); - va_end(ap); - if (!shrinker->name) - return -ENOMEM; - - err = __register_shrinker(shrinker); - if (err) { - kfree_const(shrinker->name); - shrinker->name = NULL; - } - return err; -} -#else -int register_shrinker(struct shrinker *shrinker, const char *fmt, ...) -{ - return __register_shrinker(shrinker); -} -#endif -EXPORT_SYMBOL(register_shrinker); - -/* - * Remove one - */ -void unregister_shrinker(struct shrinker *shrinker) -{ - struct dentry *debugfs_entry; - int debugfs_id; - - if (!(shrinker->flags & SHRINKER_REGISTERED)) - return; - - down_write(&shrinker_rwsem); - list_del(&shrinker->list); - shrinker->flags &= ~SHRINKER_REGISTERED; - if (shrinker->flags & SHRINKER_MEMCG_AWARE) - unregister_memcg_shrinker(shrinker); - debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id); - up_write(&shrinker_rwsem); - - shrinker_debugfs_remove(debugfs_entry, debugfs_id); - - kfree(shrinker->nr_deferred); - shrinker->nr_deferred = NULL; -} -EXPORT_SYMBOL(unregister_shrinker); - /** * synchronize_shrinkers - Wait for all running shrinkers to complete. * From patchwork Mon Aug 7 11:09:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711228 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17C15C001DB for ; Mon, 7 Aug 2023 11:24:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231473AbjHGLYH (ORCPT ); Mon, 7 Aug 2023 07:24:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60400 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231180AbjHGLXv (ORCPT ); Mon, 7 Aug 2023 07:23:51 -0400 Received: from mail-pl1-f179.google.com (mail-pl1-f179.google.com [209.85.214.179]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EDA394ED0 for ; Mon, 7 Aug 2023 04:21:06 -0700 (PDT) Received: by mail-pl1-f179.google.com with SMTP id d9443c01a7336-1bc4dc65aa7so5904295ad.0 for ; Mon, 07 Aug 2023 04:21:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407148; x=1692011948; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=dp1PQp+5gTkm4DG/kxrQVAZ0rB7KyI/rGW6TiEnUaUw=; b=Te7kg9d2kQW6gac9UP89KtIVcLTfWDu6srH7dtxrmXTL4ErpAX/pJkQtXd7hg2HtRV b8geFLLbM8+wRhZIYuLjJhyOfyGHnlddPjbSoTi8+7JUn0itl8DrGEf9FkegNhDgT4QU +aRhY4yC93Sy/uol3bSwIULh/giMXKgqvscX8PDfZ03M6CNIZOjJqm4ZovfIFxg7FXvq HemaZ47NKkfhG9oH07mD8LDQiWRUxbmI+sshlvUeh5qK7EeOWS/jAB9AyDVCuXh9Krsn cGXM1IoaSAiEJffIAN7TmuDV3qm2xRt9nfiAYhQ3/VTYWFSG3zxU2XV/jGXOIaUTjpLr zeJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407148; x=1692011948; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=dp1PQp+5gTkm4DG/kxrQVAZ0rB7KyI/rGW6TiEnUaUw=; b=ODohr7jfbW8Md70gY3KSkJg5GMpYZamu9+Qmbte4Ymh7gNirFIX5i6uL8X+3OK+GSH jDYmc9Qd2UEpXwia79U9v3ZLj6xI3u+nRjgWdD/iF66dNl84nUE2VsLqsl7JPR2O/amy ZPyEYSGCKbFaxWTdc3YCrhKFPvsLqY62XbSqnMs4MbtZwGCKrv5LotFzBJjsAi9ECt5V XPsJqvKl9ed3MZDCsDqVtCyW4QSCItfa+1kS7yWndK6cVqsjupsrlu9OuahLl9qBYoxr f0CGKtTZfX80KQU4xMaf5XQB2/9fMjBzpepCUlWmwUyExaSlYBPeXaMpoH/NsHA2yaec 7EKA== X-Gm-Message-State: ABy/qLagqxdyPBS2gLFPhEsigxEl6UzklJiJlb0jUF2YluPdW0piykgk Mz+EJmj4eH1OfQ3py+bpxDs6kw== X-Google-Smtp-Source: APBJJlGWGDf3ZP6TvEF/B95Km+XRmBUarTmlKp42txasQQnYUyfeo2SyrhxLvRA3BfrSE4M4+QRzMg== X-Received: by 2002:a17:902:dace:b0:1b8:17e8:5472 with SMTP id q14-20020a170902dace00b001b817e85472mr32807567plx.1.1691407148534; Mon, 07 Aug 2023 04:19:08 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.18.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:19:07 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 43/48] drm/ttm: introduce pool_shrink_rwsem Date: Mon, 7 Aug 2023 19:09:31 +0800 Message-Id: <20230807110936.21819-44-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Currently, the synchronize_shrinkers() is only used by TTM pool. It only requires that no shrinkers run in parallel. After we use RCU+refcount method to implement the lockless slab shrink, we can not use shrinker_rwsem or synchronize_rcu() to guarantee that all shrinker invocations have seen an update before freeing memory. So we introduce a new pool_shrink_rwsem to implement a private synchronize_shrinkers(), so as to achieve the same purpose. Signed-off-by: Qi Zheng Reviewed-by: Muchun Song Acked-by: Daniel Vetter --- drivers/gpu/drm/ttm/ttm_pool.c | 15 +++++++++++++++ include/linux/shrinker.h | 2 -- mm/shrinker.c | 15 --------------- 3 files changed, 15 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c index c9c9618c0dce..38b4c280725c 100644 --- a/drivers/gpu/drm/ttm/ttm_pool.c +++ b/drivers/gpu/drm/ttm/ttm_pool.c @@ -74,6 +74,7 @@ static struct ttm_pool_type global_dma32_uncached[MAX_ORDER + 1]; static spinlock_t shrinker_lock; static struct list_head shrinker_list; static struct shrinker *mm_shrinker; +static DECLARE_RWSEM(pool_shrink_rwsem); /* Allocate pages of size 1 << order with the given gfp_flags */ static struct page *ttm_pool_alloc_page(struct ttm_pool *pool, gfp_t gfp_flags, @@ -317,6 +318,7 @@ static unsigned int ttm_pool_shrink(void) unsigned int num_pages; struct page *p; + down_read(&pool_shrink_rwsem); spin_lock(&shrinker_lock); pt = list_first_entry(&shrinker_list, typeof(*pt), shrinker_list); list_move_tail(&pt->shrinker_list, &shrinker_list); @@ -329,6 +331,7 @@ static unsigned int ttm_pool_shrink(void) } else { num_pages = 0; } + up_read(&pool_shrink_rwsem); return num_pages; } @@ -572,6 +575,18 @@ void ttm_pool_init(struct ttm_pool *pool, struct device *dev, } EXPORT_SYMBOL(ttm_pool_init); +/** + * synchronize_shrinkers - Wait for all running shrinkers to complete. + * + * This is useful to guarantee that all shrinker invocations have seen an + * update, before freeing memory, similar to rcu. + */ +static void synchronize_shrinkers(void) +{ + down_write(&pool_shrink_rwsem); + up_write(&pool_shrink_rwsem); +} + /** * ttm_pool_fini - Cleanup a pool * diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index c55c07c3f0cb..025c8070dd86 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -103,8 +103,6 @@ struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...); void shrinker_register(struct shrinker *shrinker); void shrinker_free(struct shrinker *shrinker); -extern void synchronize_shrinkers(void); - #ifdef CONFIG_SHRINKER_DEBUG extern int __printf(2, 3) shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...); diff --git a/mm/shrinker.c b/mm/shrinker.c index 3ab301ff122d..a27779ed3798 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -650,18 +650,3 @@ void shrinker_free(struct shrinker *shrinker) kfree(shrinker); } EXPORT_SYMBOL_GPL(shrinker_free); - -/** - * synchronize_shrinkers - Wait for all running shrinkers to complete. - * - * This is equivalent to calling unregister_shrink() and register_shrinker(), - * but atomically and with less overhead. This is useful to guarantee that all - * shrinker invocations have seen an update, before freeing memory, similar to - * rcu. - */ -void synchronize_shrinkers(void) -{ - down_write(&shrinker_rwsem); - up_write(&shrinker_rwsem); -} -EXPORT_SYMBOL(synchronize_shrinkers); From patchwork Mon Aug 7 11:09:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711227 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5E58C001DB for ; Mon, 7 Aug 2023 11:24:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232492AbjHGLYs (ORCPT ); Mon, 7 Aug 2023 07:24:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59206 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232392AbjHGLX5 (ORCPT ); Mon, 7 Aug 2023 07:23:57 -0400 Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D60219B5 for ; Mon, 7 Aug 2023 04:21:18 -0700 (PDT) Received: by mail-pj1-x1035.google.com with SMTP id 98e67ed59e1d1-268663fb09cso632109a91.0 for ; Mon, 07 Aug 2023 04:21:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407162; x=1692011962; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=BzKzY0EneoO0UlcJt4xJM2Sa0N5zE3blYFeUn1CwPvs=; b=MbCTfulzQY8dcLMV7HUHZRkhp3R/ALHm/oybkLiEqSrlkrAL5AMkdjufi+qbbnlWzq EwOScEMFKT9DjlO/FYIYHMtQq2tg1SmdFY2OX8CdMMfBbKmXJY114QpKxGPF0i15Oq8D +QZTUaNL6+5L3yXNniaSpwyckXVIsRgL4m06kBthWlP5xd4q7OECI5FeIwXi87e+H4c/ GUueoXTkms0i44pnefrN2CLy0SrJ5TW2S78B6UOaIOz/bQbdtDd+1wdG+NZVHpYstsoy +lnW4zf/cx/QjFol8gTUnT8cVUpimeAwTwTHHi/YAESl2hNrNHChT1CjEcEW9U23Nr7T gLNQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407162; x=1692011962; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=BzKzY0EneoO0UlcJt4xJM2Sa0N5zE3blYFeUn1CwPvs=; b=KP881MJmj0L046SFh+aAhpjY41X6O6iztCTmCnOxKolrlwlDLHD+dvQIWoDQL64NsX 7wH9GkF8bOQAhTwwrY6kIlkTwFJP8ZvIFaWdNvejUBgIFR4vjCpW0xy3irc1GtvmAZEw UXoJxlMOBY8Ui7akd2/dRVcVr2ahBl0hM8eL8kmxWClbKJASkbfPTvSEElDawTIsp1u2 pQUwe+2DEUvEvoeIFFRLMeUbBfr1ISLbSZb8dUUsiddfaNQ8BJYGLeoCPPJ/z9OBdENK gEOteI9yJeqHbb2bLg3j5yzRZlVa+hkXQC5KitapQK6Lqbuaa1aqbxhInsJPUY0ReWFF FZjg== X-Gm-Message-State: ABy/qLYIhzoBJjUdhZOtrvDztrVSsTybZZQCKkQ2+B5wkTeHzPhHxOmt rJMKmsqIdakLqve6RVMFJoZaCg== X-Google-Smtp-Source: APBJJlGnB4Vyj5FGeoXczgSMBfjSqXYaN0nHE2UQ92aOKZGOd+EBKMKhZPi2ZgbvTuAEcRBjftj7zw== X-Received: by 2002:a17:90a:6c97:b0:263:730b:f568 with SMTP id y23-20020a17090a6c9700b00263730bf568mr23074339pjj.3.1691407161746; Mon, 07 Aug 2023 04:19:21 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.19.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:19:20 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng , Muchun Song Subject: [PATCH v4 44/48] mm: shrinker: add a secondary array for shrinker_info::{map, nr_deferred} Date: Mon, 7 Aug 2023 19:09:32 +0800 Message-Id: <20230807110936.21819-45-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Currently, we maintain two linear arrays per node per memcg, which are shrinker_info::map and shrinker_info::nr_deferred. And we need to resize them when the shrinker_nr_max is exceeded, that is, allocate a new array, and then copy the old array to the new array, and finally free the old array by RCU. For shrinker_info::map, we do set_bit() under the RCU lock, so we may set the value into the old map which is about to be freed. This may cause the value set to be lost. The current solution is not to copy the old map when resizing, but to set all the corresponding bits in the new map to 1. This solves the data loss problem, but bring the overhead of more pointless loops while doing memcg slab shrink. For shrinker_info::nr_deferred, we will only modify it under the read lock of shrinker_rwsem, so it will not run concurrently with the resizing. But after we make memcg slab shrink lockless, there will be the same data loss problem as shrinker_info::map, and we can't work around it like the map. For such resizable arrays, the most straightforward idea is to change it to xarray, like we did for list_lru [1]. We need to do xa_store() in the list_lru_add()-->set_shrinker_bit(), but this will cause memory allocation, and the list_lru_add() doesn't accept failure. A possible solution is to pre-allocate, but the location of pre-allocation is not well determined. Therefore, this commit chooses to introduce a secondary array for shrinker_info::{map, nr_deferred}, so that we only need to copy this secondary array every time the size is resized. Then even if we get the old secondary array under the RCU lock, the found map and nr_deferred are also true, so no data is lost. [1]. https://lore.kernel.org/all/20220228122126.37293-13-songmuchun@bytedance.com/ Signed-off-by: Qi Zheng Reviewed-by: Muchun Song --- include/linux/memcontrol.h | 12 +- include/linux/shrinker.h | 17 +++ mm/shrinker.c | 250 +++++++++++++++++++++++-------------- 3 files changed, 172 insertions(+), 107 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 11810a2cfd2d..b49515bb6fbd 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -21,6 +21,7 @@ #include #include #include +#include struct mem_cgroup; struct obj_cgroup; @@ -88,17 +89,6 @@ struct mem_cgroup_reclaim_iter { unsigned int generation; }; -/* - * Bitmap and deferred work of shrinker::id corresponding to memcg-aware - * shrinkers, which have elements charged to this memcg. - */ -struct shrinker_info { - struct rcu_head rcu; - atomic_long_t *nr_deferred; - unsigned long *map; - int map_nr_max; -}; - struct lruvec_stats_percpu { /* Local (CPU and cgroup) state */ long state[NR_VM_NODE_STAT_ITEMS]; diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index 025c8070dd86..eb342994675a 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -5,6 +5,23 @@ #include #include +#define SHRINKER_UNIT_BITS BITS_PER_LONG + +/* + * Bitmap and deferred work of shrinker::id corresponding to memcg-aware + * shrinkers, which have elements charged to the memcg. + */ +struct shrinker_info_unit { + atomic_long_t nr_deferred[SHRINKER_UNIT_BITS]; + DECLARE_BITMAP(map, SHRINKER_UNIT_BITS); +}; + +struct shrinker_info { + struct rcu_head rcu; + int map_nr_max; + struct shrinker_info_unit *unit[]; +}; + /* * This struct is used to pass information from page reclaim to the shrinkers. * We consolidate the values for easier extension later. diff --git a/mm/shrinker.c b/mm/shrinker.c index a27779ed3798..1911c06b8af5 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -12,15 +12,50 @@ DECLARE_RWSEM(shrinker_rwsem); #ifdef CONFIG_MEMCG static int shrinker_nr_max; -/* The shrinker_info is expanded in a batch of BITS_PER_LONG */ -static inline int shrinker_map_size(int nr_items) +static inline int shrinker_unit_size(int nr_items) { - return (DIV_ROUND_UP(nr_items, BITS_PER_LONG) * sizeof(unsigned long)); + return (DIV_ROUND_UP(nr_items, SHRINKER_UNIT_BITS) * sizeof(struct shrinker_info_unit *)); } -static inline int shrinker_defer_size(int nr_items) +static inline void shrinker_unit_free(struct shrinker_info *info, int start) { - return (round_up(nr_items, BITS_PER_LONG) * sizeof(atomic_long_t)); + struct shrinker_info_unit **unit; + int nr, i; + + if (!info) + return; + + unit = info->unit; + nr = DIV_ROUND_UP(info->map_nr_max, SHRINKER_UNIT_BITS); + + for (i = start; i < nr; i++) { + if (!unit[i]) + break; + + kvfree(unit[i]); + unit[i] = NULL; + } +} + +static inline int shrinker_unit_alloc(struct shrinker_info *new, + struct shrinker_info *old, int nid) +{ + struct shrinker_info_unit *unit; + int nr = DIV_ROUND_UP(new->map_nr_max, SHRINKER_UNIT_BITS); + int start = old ? DIV_ROUND_UP(old->map_nr_max, SHRINKER_UNIT_BITS) : 0; + int i; + + for (i = start; i < nr; i++) { + unit = kvzalloc_node(sizeof(*unit), GFP_KERNEL, nid); + if (!unit) { + shrinker_unit_free(new, start); + return -ENOMEM; + } + + new->unit[i] = unit; + } + + return 0; } void free_shrinker_info(struct mem_cgroup *memcg) @@ -32,6 +67,7 @@ void free_shrinker_info(struct mem_cgroup *memcg) for_each_node(nid) { pn = memcg->nodeinfo[nid]; info = rcu_dereference_protected(pn->shrinker_info, true); + shrinker_unit_free(info, 0); kvfree(info); rcu_assign_pointer(pn->shrinker_info, NULL); } @@ -40,28 +76,27 @@ void free_shrinker_info(struct mem_cgroup *memcg) int alloc_shrinker_info(struct mem_cgroup *memcg) { struct shrinker_info *info; - int nid, size, ret = 0; - int map_size, defer_size = 0; + int nid, ret = 0; + int array_size = 0; down_write(&shrinker_rwsem); - map_size = shrinker_map_size(shrinker_nr_max); - defer_size = shrinker_defer_size(shrinker_nr_max); - size = map_size + defer_size; + array_size = shrinker_unit_size(shrinker_nr_max); for_each_node(nid) { - info = kvzalloc_node(sizeof(*info) + size, GFP_KERNEL, nid); - if (!info) { - free_shrinker_info(memcg); - ret = -ENOMEM; - break; - } - info->nr_deferred = (atomic_long_t *)(info + 1); - info->map = (void *)info->nr_deferred + defer_size; + info = kvzalloc_node(sizeof(*info) + array_size, GFP_KERNEL, nid); + if (!info) + goto err; info->map_nr_max = shrinker_nr_max; + if (shrinker_unit_alloc(info, NULL, nid)) + goto err; rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, info); } up_write(&shrinker_rwsem); return ret; + +err: + free_shrinker_info(memcg); + return -ENOMEM; } static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, @@ -71,15 +106,12 @@ static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, lockdep_is_held(&shrinker_rwsem)); } -static int expand_one_shrinker_info(struct mem_cgroup *memcg, - int map_size, int defer_size, - int old_map_size, int old_defer_size, - int new_nr_max) +static int expand_one_shrinker_info(struct mem_cgroup *memcg, int new_size, + int old_size, int new_nr_max) { struct shrinker_info *new, *old; struct mem_cgroup_per_node *pn; int nid; - int size = map_size + defer_size; for_each_node(nid) { pn = memcg->nodeinfo[nid]; @@ -92,21 +124,18 @@ static int expand_one_shrinker_info(struct mem_cgroup *memcg, if (new_nr_max <= old->map_nr_max) continue; - new = kvmalloc_node(sizeof(*new) + size, GFP_KERNEL, nid); + new = kvmalloc_node(sizeof(*new) + new_size, GFP_KERNEL, nid); if (!new) return -ENOMEM; - new->nr_deferred = (atomic_long_t *)(new + 1); - new->map = (void *)new->nr_deferred + defer_size; new->map_nr_max = new_nr_max; - /* map: set all old bits, clear all new bits */ - memset(new->map, (int)0xff, old_map_size); - memset((void *)new->map + old_map_size, 0, map_size - old_map_size); - /* nr_deferred: copy old values, clear all new values */ - memcpy(new->nr_deferred, old->nr_deferred, old_defer_size); - memset((void *)new->nr_deferred + old_defer_size, 0, - defer_size - old_defer_size); + /* copy old values, allocate all new values */ + memcpy(new->unit, old->unit, old_size); + if (shrinker_unit_alloc(new, old, nid)) { + kvfree(new); + return -ENOMEM; + } rcu_assign_pointer(pn->shrinker_info, new); kvfree_rcu(old, rcu); @@ -118,9 +147,8 @@ static int expand_one_shrinker_info(struct mem_cgroup *memcg, static int expand_shrinker_info(int new_id) { int ret = 0; - int new_nr_max = round_up(new_id + 1, BITS_PER_LONG); - int map_size, defer_size = 0; - int old_map_size, old_defer_size = 0; + int new_nr_max = round_up(new_id + 1, SHRINKER_UNIT_BITS); + int new_size, old_size = 0; struct mem_cgroup *memcg; if (!root_mem_cgroup) @@ -128,15 +156,12 @@ static int expand_shrinker_info(int new_id) lockdep_assert_held(&shrinker_rwsem); - map_size = shrinker_map_size(new_nr_max); - defer_size = shrinker_defer_size(new_nr_max); - old_map_size = shrinker_map_size(shrinker_nr_max); - old_defer_size = shrinker_defer_size(shrinker_nr_max); + new_size = shrinker_unit_size(new_nr_max); + old_size = shrinker_unit_size(shrinker_nr_max); memcg = mem_cgroup_iter(NULL, NULL, NULL); do { - ret = expand_one_shrinker_info(memcg, map_size, defer_size, - old_map_size, old_defer_size, + ret = expand_one_shrinker_info(memcg, new_size, old_size, new_nr_max); if (ret) { mem_cgroup_iter_break(NULL, memcg); @@ -150,17 +175,34 @@ static int expand_shrinker_info(int new_id) return ret; } +static inline int shriner_id_to_index(int shrinker_id) +{ + return shrinker_id / SHRINKER_UNIT_BITS; +} + +static inline int shriner_id_to_offset(int shrinker_id) +{ + return shrinker_id % SHRINKER_UNIT_BITS; +} + +static inline int calc_shrinker_id(int index, int offset) +{ + return index * SHRINKER_UNIT_BITS + offset; +} + void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) { if (shrinker_id >= 0 && memcg && !mem_cgroup_is_root(memcg)) { struct shrinker_info *info; + struct shrinker_info_unit *unit; rcu_read_lock(); info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); + unit = info->unit[shriner_id_to_index(shrinker_id)]; if (!WARN_ON_ONCE(shrinker_id >= info->map_nr_max)) { /* Pairs with smp mb in shrink_slab() */ smp_mb__before_atomic(); - set_bit(shrinker_id, info->map); + set_bit(shriner_id_to_offset(shrinker_id), unit->map); } rcu_read_unlock(); } @@ -209,26 +251,31 @@ static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, struct mem_cgroup *memcg) { struct shrinker_info *info; + struct shrinker_info_unit *unit; info = shrinker_info_protected(memcg, nid); - return atomic_long_xchg(&info->nr_deferred[shrinker->id], 0); + unit = info->unit[shriner_id_to_index(shrinker->id)]; + return atomic_long_xchg(&unit->nr_deferred[shriner_id_to_offset(shrinker->id)], 0); } static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, struct mem_cgroup *memcg) { struct shrinker_info *info; + struct shrinker_info_unit *unit; info = shrinker_info_protected(memcg, nid); - return atomic_long_add_return(nr, &info->nr_deferred[shrinker->id]); + unit = info->unit[shriner_id_to_index(shrinker->id)]; + return atomic_long_add_return(nr, &unit->nr_deferred[shriner_id_to_offset(shrinker->id)]); } void reparent_shrinker_deferred(struct mem_cgroup *memcg) { - int i, nid; + int nid, index, offset; long nr; struct mem_cgroup *parent; struct shrinker_info *child_info, *parent_info; + struct shrinker_info_unit *child_unit, *parent_unit; parent = parent_mem_cgroup(memcg); if (!parent) @@ -239,9 +286,13 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) for_each_node(nid) { child_info = shrinker_info_protected(memcg, nid); parent_info = shrinker_info_protected(parent, nid); - for (i = 0; i < child_info->map_nr_max; i++) { - nr = atomic_long_read(&child_info->nr_deferred[i]); - atomic_long_add(nr, &parent_info->nr_deferred[i]); + for (index = 0; index < shriner_id_to_index(child_info->map_nr_max); index++) { + child_unit = child_info->unit[index]; + parent_unit = parent_info->unit[index]; + for (offset = 0; offset < SHRINKER_UNIT_BITS; offset++) { + nr = atomic_long_read(&child_unit->nr_deferred[offset]); + atomic_long_add(nr, &parent_unit->nr_deferred[offset]); + } } } up_read(&shrinker_rwsem); @@ -407,7 +458,7 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, { struct shrinker_info *info; unsigned long ret, freed = 0; - int i; + int offset, index = 0; if (!mem_cgroup_online(memcg)) return 0; @@ -419,56 +470,63 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, if (unlikely(!info)) goto unlock; - for_each_set_bit(i, info->map, info->map_nr_max) { - struct shrink_control sc = { - .gfp_mask = gfp_mask, - .nid = nid, - .memcg = memcg, - }; - struct shrinker *shrinker; + for (; index < shriner_id_to_index(info->map_nr_max); index++) { + struct shrinker_info_unit *unit; - shrinker = idr_find(&shrinker_idr, i); - if (unlikely(!shrinker || !(shrinker->flags & SHRINKER_REGISTERED))) { - if (!shrinker) - clear_bit(i, info->map); - continue; - } + unit = info->unit[index]; - /* Call non-slab shrinkers even though kmem is disabled */ - if (!memcg_kmem_online() && - !(shrinker->flags & SHRINKER_NONSLAB)) - continue; + for_each_set_bit(offset, unit->map, SHRINKER_UNIT_BITS) { + struct shrink_control sc = { + .gfp_mask = gfp_mask, + .nid = nid, + .memcg = memcg, + }; + struct shrinker *shrinker; + int shrinker_id = calc_shrinker_id(index, offset); - ret = do_shrink_slab(&sc, shrinker, priority); - if (ret == SHRINK_EMPTY) { - clear_bit(i, info->map); - /* - * After the shrinker reported that it had no objects to - * free, but before we cleared the corresponding bit in - * the memcg shrinker map, a new object might have been - * added. To make sure, we have the bit set in this - * case, we invoke the shrinker one more time and reset - * the bit if it reports that it is not empty anymore. - * The memory barrier here pairs with the barrier in - * set_shrinker_bit(): - * - * list_lru_add() shrink_slab_memcg() - * list_add_tail() clear_bit() - * - * set_bit() do_shrink_slab() - */ - smp_mb__after_atomic(); - ret = do_shrink_slab(&sc, shrinker, priority); - if (ret == SHRINK_EMPTY) - ret = 0; - else - set_shrinker_bit(memcg, nid, i); - } - freed += ret; + shrinker = idr_find(&shrinker_idr, shrinker_id); + if (unlikely(!shrinker || !(shrinker->flags & SHRINKER_REGISTERED))) { + if (!shrinker) + clear_bit(offset, unit->map); + continue; + } - if (rwsem_is_contended(&shrinker_rwsem)) { - freed = freed ? : 1; - break; + /* Call non-slab shrinkers even though kmem is disabled */ + if (!memcg_kmem_online() && + !(shrinker->flags & SHRINKER_NONSLAB)) + continue; + + ret = do_shrink_slab(&sc, shrinker, priority); + if (ret == SHRINK_EMPTY) { + clear_bit(offset, unit->map); + /* + * After the shrinker reported that it had no objects to + * free, but before we cleared the corresponding bit in + * the memcg shrinker map, a new object might have been + * added. To make sure, we have the bit set in this + * case, we invoke the shrinker one more time and reset + * the bit if it reports that it is not empty anymore. + * The memory barrier here pairs with the barrier in + * set_shrinker_bit(): + * + * list_lru_add() shrink_slab_memcg() + * list_add_tail() clear_bit() + * + * set_bit() do_shrink_slab() + */ + smp_mb__after_atomic(); + ret = do_shrink_slab(&sc, shrinker, priority); + if (ret == SHRINK_EMPTY) + ret = 0; + else + set_shrinker_bit(memcg, nid, shrinker_id); + } + freed += ret; + + if (rwsem_is_contended(&shrinker_rwsem)) { + freed = freed ? : 1; + goto unlock; + } } } unlock: From patchwork Mon Aug 7 11:09:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711220 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5842DEB64DD for ; Mon, 7 Aug 2023 11:35:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231856AbjHGLfM (ORCPT ); Mon, 7 Aug 2023 07:35:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42688 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231923AbjHGLex (ORCPT ); Mon, 7 Aug 2023 07:34:53 -0400 Received: from mail-io1-xd31.google.com (mail-io1-xd31.google.com [IPv6:2607:f8b0:4864:20::d31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 33D3310F1 for ; Mon, 7 Aug 2023 04:31:57 -0700 (PDT) Received: by mail-io1-xd31.google.com with SMTP id ca18e2360f4ac-780c89d1998so32801139f.1 for ; Mon, 07 Aug 2023 04:31:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407851; x=1692012651; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=VvZzKGLWBPnU/YifQKDl8Wb9pt+zZKHS88YiwcrJMO0=; b=EVH44inP77MTa4Gn+yJG5ZPtnh86VGxhykvAlW/1r1e6zgvERDmiMLpD5iJvtg2FuB GFljXUc01uwCLvcqule/RWd5Jmg9KYAd+4SsC/PvesoFFrhbNKLTr+GQJ++1fy481pHC +7AVBFKHocrAIWvgZiSagZEEvP4vosXNu7NfYsNreBaGzSLmITZeKJadJE+TDjEkp9ly unOSyUHso9AQBv8GiCRepSTob/q7ouL+xo5CUFmU1Oc76YvbFycYelTOEMv+JpvkNEV+ HQbAN/zNC6Nxg+3WIOqZRO/Y22brlTsh4ygbP8JjxvLWEZO8/nyC+wwojAsHyGmw04Wp gQMw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407851; x=1692012651; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=VvZzKGLWBPnU/YifQKDl8Wb9pt+zZKHS88YiwcrJMO0=; b=cOt27wsIU7OS5s+/xgYuI8eJLpDV9uvONqXVE82frCQ7OEtIv7VxTnAe7vgONs6Csv Tc4qL8SiF4RXamLQAIX3h4KMlS5YKgLNm2FxagiMaJg6uFwGO60RzD6O3UrGjECsj8uw bYaIahB+MXPefbormaCZw2mQzAvp5ylqmUQ4apEqLFNl+G1C02j2g5HBb/22QiUk+Ha0 5sK+GUpDx4o2L4KsGJE+wJoSe5t6LNLDNhSUrIMn2Rr0HhrSQrxby0vFnUybuODzhvpy 8kFlziGj+A0umnOO5dsaxIIHjqQtaMA2nh76IorKc3LT0oI3A57dFUrCiKkWWQvCmisE BFlQ== X-Gm-Message-State: ABy/qLZkbVnegyfIi31ODHT+AiNmaWMQw0cceXM6AQaLQrTcC5woeCWb 5ZaqRfqxNOWlg4hb7GzDGIHNNQ== X-Google-Smtp-Source: APBJJlG/XxZB6sKzQ/QKN1+d/Y+m2Z7kNpKSUjYzz7Oa2LvDnuz3c5eyzNfvhPPV8k8oKjwIpKOiLg== X-Received: by 2002:a6b:c30f:0:b0:783:6e76:6bc7 with SMTP id t15-20020a6bc30f000000b007836e766bc7mr26415608iof.2.1691407174771; Mon, 07 Aug 2023 04:19:34 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.19.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:19:34 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 45/48] mm: shrinker: make global slab shrink lockless Date: Mon, 7 Aug 2023 19:09:33 +0800 Message-Id: <20230807110936.21819-46-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The shrinker_rwsem is a global read-write lock in shrinkers subsystem, which protects most operations such as slab shrink, registration and unregistration of shrinkers, etc. This can easily cause problems in the following cases. 1) When the memory pressure is high and there are many filesystems mounted or unmounted at the same time, slab shrink will be affected (down_read_trylock() failed). Such as the real workload mentioned by Kirill Tkhai: ``` One of the real workloads from my experience is start of an overcommitted node containing many starting containers after node crash (or many resuming containers after reboot for kernel update). In these cases memory pressure is huge, and the node goes round in long reclaim. ``` 2) If a shrinker is blocked (such as the case mentioned in [1]) and a writer comes in (such as mount a fs), then this writer will be blocked and cause all subsequent shrinker-related operations to be blocked. Even if there is no competitor when shrinking slab, there may still be a problem. The down_read_trylock() may become a perf hotspot with frequent calls to shrink_slab(). Because of the poor multicore scalability of atomic operations, this can lead to a significant drop in IPC (instructions per cycle). We used to implement the lockless slab shrink with SRCU [2], but then kernel test robot reported -88.8% regression in stress-ng.ramfs.ops_per_sec test case [3], so we reverted it [4]. This commit uses the refcount+RCU method [5] proposed by Dave Chinner to re-implement the lockless global slab shrink. The memcg slab shrink is handled in the subsequent patch. For now, all shrinker instances are converted to dynamically allocated and will be freed by call_rcu(). So we can use rcu_read_{lock,unlock}() to ensure that the shrinker instance is valid. And the shrinker instance will not be run again after unregistration. So the structure that records the pointer of shrinker instance can be safely freed without waiting for the RCU read-side critical section. In this way, while we implement the lockless slab shrink, we don't need to be blocked in unregister_shrinker(). The following are the test results: stress-ng --timeout 60 --times --verify --metrics-brief --ramfs 9 & 1) Before applying this patchset: setting to a 60 second run per stressor dispatching hogs: 9 ramfs stressor bogo ops real time usr time sys time bogo ops/s bogo ops/s (secs) (secs) (secs) (real time) (usr+sys time) ramfs 735238 60.00 12.37 363.70 12253.05 1955.08 for a 60.01s run time: 1440.27s available CPU time 12.36s user time ( 0.86%) 363.70s system time ( 25.25%) 376.06s total time ( 26.11%) load average: 10.79 4.47 1.69 passed: 9: ramfs (9) failed: 0 skipped: 0 successful run completed in 60.01s (1 min, 0.01 secs) 2) After applying this patchset: setting to a 60 second run per stressor dispatching hogs: 9 ramfs stressor bogo ops real time usr time sys time bogo ops/s bogo ops/s (secs) (secs) (secs) (real time) (usr+sys time) ramfs 746698 60.00 12.45 376.16 12444.02 1921.47 for a 60.01s run time: 1440.28s available CPU time 12.44s user time ( 0.86%) 376.16s system time ( 26.12%) 388.60s total time ( 26.98%) load average: 9.01 3.85 1.49 passed: 9: ramfs (9) failed: 0 skipped: 0 successful run completed in 60.01s (1 min, 0.01 secs) We can see that the ops/s has hardly changed. [1]. https://lore.kernel.org/lkml/20191129214541.3110-1-ptikhomirov@virtuozzo.com/ [2]. https://lore.kernel.org/lkml/20230313112819.38938-1-zhengqi.arch@bytedance.com/ [3]. https://lore.kernel.org/lkml/202305230837.db2c233f-yujie.liu@intel.com/ [4]. https://lore.kernel.org/all/20230609081518.3039120-1-qi.zheng@linux.dev/ [5]. https://lore.kernel.org/lkml/ZIJhou1d55d4H1s0@dread.disaster.area/ Signed-off-by: Qi Zheng --- include/linux/shrinker.h | 17 ++++++++++ mm/shrinker.c | 70 +++++++++++++++++++++++++++++----------- 2 files changed, 68 insertions(+), 19 deletions(-) diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h index eb342994675a..f06225f18531 100644 --- a/include/linux/shrinker.h +++ b/include/linux/shrinker.h @@ -4,6 +4,8 @@ #include #include +#include +#include #define SHRINKER_UNIT_BITS BITS_PER_LONG @@ -87,6 +89,10 @@ struct shrinker { int seeks; /* seeks to recreate an obj */ unsigned flags; + refcount_t refcount; + struct completion done; + struct rcu_head rcu; + void *private_data; /* These are for internal use */ @@ -120,6 +126,17 @@ struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...); void shrinker_register(struct shrinker *shrinker); void shrinker_free(struct shrinker *shrinker); +static inline bool shrinker_try_get(struct shrinker *shrinker) +{ + return refcount_inc_not_zero(&shrinker->refcount); +} + +static inline void shrinker_put(struct shrinker *shrinker) +{ + if (refcount_dec_and_test(&shrinker->refcount)) + complete(&shrinker->done); +} + #ifdef CONFIG_SHRINKER_DEBUG extern int __printf(2, 3) shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...); diff --git a/mm/shrinker.c b/mm/shrinker.c index 1911c06b8af5..d318f5621862 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -2,6 +2,7 @@ #include #include #include +#include #include #include "internal.h" @@ -577,33 +578,42 @@ unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg, if (!mem_cgroup_disabled() && !mem_cgroup_is_root(memcg)) return shrink_slab_memcg(gfp_mask, nid, memcg, priority); - if (!down_read_trylock(&shrinker_rwsem)) - goto out; - - list_for_each_entry(shrinker, &shrinker_list, list) { + rcu_read_lock(); + list_for_each_entry_rcu(shrinker, &shrinker_list, list) { struct shrink_control sc = { .gfp_mask = gfp_mask, .nid = nid, .memcg = memcg, }; + if (!shrinker_try_get(shrinker)) + continue; + + /* + * We can safely unlock the RCU lock here since we already + * hold the refcount of the shrinker. + */ + rcu_read_unlock(); + ret = do_shrink_slab(&sc, shrinker, priority); if (ret == SHRINK_EMPTY) ret = 0; freed += ret; + /* - * Bail out if someone want to register a new shrinker to - * prevent the registration from being stalled for long periods - * by parallel ongoing shrinking. + * This shrinker may be deleted from shrinker_list and freed + * after the shrinker_put() below, but this shrinker is still + * used for the next traversal. So it is necessary to hold the + * RCU lock first to prevent this shrinker from being freed, + * which also ensures that the next shrinker that is traversed + * will not be freed (even if it is deleted from shrinker_list + * at the same time). */ - if (rwsem_is_contended(&shrinker_rwsem)) { - freed = freed ? : 1; - break; - } + rcu_read_lock(); + shrinker_put(shrinker); } - up_read(&shrinker_rwsem); -out: + rcu_read_unlock(); cond_resched(); return freed; } @@ -671,13 +681,29 @@ void shrinker_register(struct shrinker *shrinker) } down_write(&shrinker_rwsem); - list_add_tail(&shrinker->list, &shrinker_list); + list_add_tail_rcu(&shrinker->list, &shrinker_list); shrinker->flags |= SHRINKER_REGISTERED; shrinker_debugfs_add(shrinker); up_write(&shrinker_rwsem); + + init_completion(&shrinker->done); + /* + * Now the shrinker is fully set up, take the first reference to it to + * indicate that lookup operations are now allowed to use it via + * shrinker_try_get(). + */ + refcount_set(&shrinker->refcount, 1); } EXPORT_SYMBOL_GPL(shrinker_register); +static void shrinker_free_rcu_cb(struct rcu_head *head) +{ + struct shrinker *shrinker = container_of(head, struct shrinker, rcu); + + kfree(shrinker->nr_deferred); + kfree(shrinker); +} + void shrinker_free(struct shrinker *shrinker) { struct dentry *debugfs_entry = NULL; @@ -686,9 +712,18 @@ void shrinker_free(struct shrinker *shrinker) if (!shrinker) return; + if (shrinker->flags & SHRINKER_REGISTERED) { + shrinker_put(shrinker); + wait_for_completion(&shrinker->done); + } + down_write(&shrinker_rwsem); if (shrinker->flags & SHRINKER_REGISTERED) { - list_del(&shrinker->list); + /* + * Lookups on the shrinker are over and will fail in the future, + * so we can now remove it from the lists and free it. + */ + list_del_rcu(&shrinker->list); debugfs_entry = shrinker_debugfs_detach(shrinker, &debugfs_id); shrinker->flags &= ~SHRINKER_REGISTERED; } else { @@ -702,9 +737,6 @@ void shrinker_free(struct shrinker *shrinker) if (debugfs_entry) shrinker_debugfs_remove(debugfs_entry, debugfs_id); - kfree(shrinker->nr_deferred); - shrinker->nr_deferred = NULL; - - kfree(shrinker); + call_rcu(&shrinker->rcu, shrinker_free_rcu_cb); } EXPORT_SYMBOL_GPL(shrinker_free); From patchwork Mon Aug 7 11:09:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 711219 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C315C001DF for ; Mon, 7 Aug 2023 11:36:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232993AbjHGLgI (ORCPT ); Mon, 7 Aug 2023 07:36:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41084 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232850AbjHGLfm (ORCPT ); Mon, 7 Aug 2023 07:35:42 -0400 Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A51A59C0 for ; Mon, 7 Aug 2023 04:32:22 -0700 (PDT) Received: by mail-pf1-x42b.google.com with SMTP id d2e1a72fcca58-6878db91494so760517b3a.0 for ; Mon, 07 Aug 2023 04:32:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407889; x=1692012689; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=kfKKsEp61SZUnTy00HUcIO/dAXsDrrCBrc1q4f5gA2g=; b=YTf2xoN4seRbiudsIzCHRWgp7EKOkeaTDzeY2haxBXiuEWbNbXz6cH9DDL3O0ohttS JowM/4KaX9RWh3yp4j3wH2eivV97d4sSJNnJk1bLvB/0+K9QGCDX0cgBJAvUeuxl/2dI xHg75kySn5aG45vPUfqI71xkXRo2FnWRq5fk6XNxvLuxO+sbcw3jVw1f4ADphkcxyWiY cNKJO/5tFqbb7Auy8uM7aJAjk0NVgZVAyjbkqO1TDFzPNQ0M4ZqBsMs+dzb+3fXcQUWv nqjIG+Pb74hK5KQBienWnujFBLw6L2wjjUrgTt5qgAENrt+F3346auveAHXvUKn2nxk4 wH8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407889; x=1692012689; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=kfKKsEp61SZUnTy00HUcIO/dAXsDrrCBrc1q4f5gA2g=; b=VTePVnbIk+CU3OY9/aV3oW/7RNS+4AtQ97KnU0XkEvTcBSyMS2MktdUM8tvP4gdh9E q9wrbLusII9qrUL5yhWSm4VTGGEKuRT9oJq2XelrQS8eKTaCsgc1nzEkbqrIX+7aFcmV 1gD0v+mqT6q6GsHZ3nbA+gCB8R9acVB/awK4CZHw4IMGQOQZufX+iOpxb5QtmSbj7z6q 9pHLzq3AAzbEM1JJFumGqkYrvnwwGtzAIHNgkWTO7QuCRdikK4zAvncpXnxi3KllgHhQ E/i/3jfW6oPGEcWfzOFIY2o0LAdN2+6Svbcflyz0tLUVtD5UR46oljMKLeoBJ6ZamURw /LfA== X-Gm-Message-State: AOJu0YwrfLJnXOqwPjO6TDLwN8jqVhbiV2yNEPEyVG9smzj00bXEGXwb GpGFhp8MaYUELoL8ptI0nByJVkETiZv+yGGMgEM= X-Google-Smtp-Source: APBJJlGG6pz8UXODUVvMLzBj3hYH8JYeumw11e9YZ9plh8RnP0KuzfFyuRP+T7CTu9v0n/nCJMsqhQ== X-Received: by 2002:a17:90a:1090:b0:268:126c:8a8b with SMTP id c16-20020a17090a109000b00268126c8a8bmr24580285pja.3.1691407187287; Mon, 07 Aug 2023 04:19:47 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.19.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:19:46 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 46/48] mm: shrinker: make memcg slab shrink lockless Date: Mon, 7 Aug 2023 19:09:34 +0800 Message-Id: <20230807110936.21819-47-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Like global slab shrink, this commit also uses refcount+RCU method to make memcg slab shrink lockless. Use the following script to do slab shrink stress test: ``` DIR="/root/shrinker/memcg/mnt" do_create() { mkdir -p /sys/fs/cgroup/memory/test echo 4G > /sys/fs/cgroup/memory/test/memory.limit_in_bytes for i in `seq 0 $1`; do mkdir -p /sys/fs/cgroup/memory/test/$i; echo $$ > /sys/fs/cgroup/memory/test/$i/cgroup.procs; mkdir -p $DIR/$i; done } do_mount() { for i in `seq $1 $2`; do mount -t tmpfs $i $DIR/$i; done } do_touch() { for i in `seq $1 $2`; do echo $$ > /sys/fs/cgroup/memory/test/$i/cgroup.procs; dd if=/dev/zero of=$DIR/$i/file$i bs=1M count=1 & done } case "$1" in touch) do_touch $2 $3 ;; test) do_create 4000 do_mount 0 4000 do_touch 0 3000 ;; *) exit 1 ;; esac ``` Save the above script, then run test and touch commands. Then we can use the following perf command to view hotspots: perf top -U -F 999 1) Before applying this patchset: 40.44% [kernel] [k] down_read_trylock 17.59% [kernel] [k] up_read 13.64% [kernel] [k] pv_native_safe_halt 11.90% [kernel] [k] shrink_slab 8.21% [kernel] [k] idr_find 2.71% [kernel] [k] _find_next_bit 1.36% [kernel] [k] shrink_node 0.81% [kernel] [k] shrink_lruvec 0.80% [kernel] [k] __radix_tree_lookup 0.50% [kernel] [k] do_shrink_slab 0.21% [kernel] [k] list_lru_count_one 0.16% [kernel] [k] mem_cgroup_iter 2) After applying this patchset: 60.17% [kernel] [k] shrink_slab 20.42% [kernel] [k] pv_native_safe_halt 3.03% [kernel] [k] do_shrink_slab 2.73% [kernel] [k] shrink_node 2.27% [kernel] [k] shrink_lruvec 2.00% [kernel] [k] __rcu_read_unlock 1.92% [kernel] [k] mem_cgroup_iter 0.98% [kernel] [k] __rcu_read_lock 0.91% [kernel] [k] osq_lock 0.63% [kernel] [k] mem_cgroup_calculate_protection 0.55% [kernel] [k] shrinker_put 0.46% [kernel] [k] list_lru_count_one We can see that the first perf hotspot becomes shrink_slab, which is what we expect. Signed-off-by: Qi Zheng --- mm/shrinker.c | 80 ++++++++++++++++++++++++++++++++++----------------- 1 file changed, 54 insertions(+), 26 deletions(-) diff --git a/mm/shrinker.c b/mm/shrinker.c index d318f5621862..fee6f62904fb 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -107,6 +107,12 @@ static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, lockdep_is_held(&shrinker_rwsem)); } +static struct shrinker_info *shrinker_info_rcu(struct mem_cgroup *memcg, + int nid) +{ + return rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); +} + static int expand_one_shrinker_info(struct mem_cgroup *memcg, int new_size, int old_size, int new_nr_max) { @@ -198,7 +204,7 @@ void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) struct shrinker_info_unit *unit; rcu_read_lock(); - info = rcu_dereference(memcg->nodeinfo[nid]->shrinker_info); + info = shrinker_info_rcu(memcg, nid); unit = info->unit[shriner_id_to_index(shrinker_id)]; if (!WARN_ON_ONCE(shrinker_id >= info->map_nr_max)) { /* Pairs with smp mb in shrink_slab() */ @@ -211,7 +217,7 @@ void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id) static DEFINE_IDR(shrinker_idr); -static int prealloc_memcg_shrinker(struct shrinker *shrinker) +static int shrinker_memcg_alloc(struct shrinker *shrinker) { int id, ret = -ENOMEM; @@ -219,7 +225,6 @@ static int prealloc_memcg_shrinker(struct shrinker *shrinker) return -ENOSYS; down_write(&shrinker_rwsem); - /* This may call shrinker, so it must use down_read_trylock() */ id = idr_alloc(&shrinker_idr, shrinker, 0, 0, GFP_KERNEL); if (id < 0) goto unlock; @@ -237,7 +242,7 @@ static int prealloc_memcg_shrinker(struct shrinker *shrinker) return ret; } -static void unregister_memcg_shrinker(struct shrinker *shrinker) +static void shrinker_memcg_remove(struct shrinker *shrinker) { int id = shrinker->id; @@ -253,10 +258,15 @@ static long xchg_nr_deferred_memcg(int nid, struct shrinker *shrinker, { struct shrinker_info *info; struct shrinker_info_unit *unit; + long nr_deferred; - info = shrinker_info_protected(memcg, nid); + rcu_read_lock(); + info = shrinker_info_rcu(memcg, nid); unit = info->unit[shriner_id_to_index(shrinker->id)]; - return atomic_long_xchg(&unit->nr_deferred[shriner_id_to_offset(shrinker->id)], 0); + nr_deferred = atomic_long_xchg(&unit->nr_deferred[shriner_id_to_offset(shrinker->id)], 0); + rcu_read_unlock(); + + return nr_deferred; } static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, @@ -264,10 +274,16 @@ static long add_nr_deferred_memcg(long nr, int nid, struct shrinker *shrinker, { struct shrinker_info *info; struct shrinker_info_unit *unit; + long nr_deferred; - info = shrinker_info_protected(memcg, nid); + rcu_read_lock(); + info = shrinker_info_rcu(memcg, nid); unit = info->unit[shriner_id_to_index(shrinker->id)]; - return atomic_long_add_return(nr, &unit->nr_deferred[shriner_id_to_offset(shrinker->id)]); + nr_deferred = + atomic_long_add_return(nr, &unit->nr_deferred[shriner_id_to_offset(shrinker->id)]); + rcu_read_unlock(); + + return nr_deferred; } void reparent_shrinker_deferred(struct mem_cgroup *memcg) @@ -299,12 +315,12 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) up_read(&shrinker_rwsem); } #else -static int prealloc_memcg_shrinker(struct shrinker *shrinker) +static int shrinker_memcg_alloc(struct shrinker *shrinker) { return -ENOSYS; } -static void unregister_memcg_shrinker(struct shrinker *shrinker) +static void shrinker_memcg_remove(struct shrinker *shrinker) { } @@ -464,18 +480,23 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, if (!mem_cgroup_online(memcg)) return 0; - if (!down_read_trylock(&shrinker_rwsem)) - return 0; - - info = shrinker_info_protected(memcg, nid); +again: + rcu_read_lock(); + info = shrinker_info_rcu(memcg, nid); if (unlikely(!info)) goto unlock; - for (; index < shriner_id_to_index(info->map_nr_max); index++) { + if (index < shriner_id_to_index(info->map_nr_max)) { struct shrinker_info_unit *unit; unit = info->unit[index]; + /* + * The shrinker_info_unit will not be freed, so we can + * safely release the RCU lock here. + */ + rcu_read_unlock(); + for_each_set_bit(offset, unit->map, SHRINKER_UNIT_BITS) { struct shrink_control sc = { .gfp_mask = gfp_mask, @@ -485,12 +506,14 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, struct shrinker *shrinker; int shrinker_id = calc_shrinker_id(index, offset); + rcu_read_lock(); shrinker = idr_find(&shrinker_idr, shrinker_id); - if (unlikely(!shrinker || !(shrinker->flags & SHRINKER_REGISTERED))) { - if (!shrinker) - clear_bit(offset, unit->map); + if (unlikely(!shrinker || !shrinker_try_get(shrinker))) { + clear_bit(offset, unit->map); + rcu_read_unlock(); continue; } + rcu_read_unlock(); /* Call non-slab shrinkers even though kmem is disabled */ if (!memcg_kmem_online() && @@ -523,15 +546,20 @@ static unsigned long shrink_slab_memcg(gfp_t gfp_mask, int nid, set_shrinker_bit(memcg, nid, shrinker_id); } freed += ret; - - if (rwsem_is_contended(&shrinker_rwsem)) { - freed = freed ? : 1; - goto unlock; - } + shrinker_put(shrinker); } + + /* + * We have already exited the read-side of rcu critical section + * before calling do_shrink_slab(), the shrinker_info may be + * released in expand_one_shrinker_info(), so reacquire the + * shrinker_info. + */ + index++; + goto again; } unlock: - up_read(&shrinker_rwsem); + rcu_read_unlock(); return freed; } #else /* !CONFIG_MEMCG */ @@ -638,7 +666,7 @@ struct shrinker *shrinker_alloc(unsigned int flags, const char *fmt, ...) shrinker->flags = flags | SHRINKER_ALLOCATED; if (flags & SHRINKER_MEMCG_AWARE) { - err = prealloc_memcg_shrinker(shrinker); + err = shrinker_memcg_alloc(shrinker); if (err == -ENOSYS) shrinker->flags &= ~SHRINKER_MEMCG_AWARE; else if (err == 0) @@ -731,7 +759,7 @@ void shrinker_free(struct shrinker *shrinker) } if (shrinker->flags & SHRINKER_MEMCG_AWARE) - unregister_memcg_shrinker(shrinker); + shrinker_memcg_remove(shrinker); up_write(&shrinker_rwsem); if (debugfs_entry) From patchwork Mon Aug 7 11:09:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712881 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7081AC001DF for ; Mon, 7 Aug 2023 11:42:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233002AbjHGLmO (ORCPT ); Mon, 7 Aug 2023 07:42:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50624 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233067AbjHGLl5 (ORCPT ); Mon, 7 Aug 2023 07:41:57 -0400 Received: from mail-qv1-xf32.google.com (mail-qv1-xf32.google.com [IPv6:2607:f8b0:4864:20::f32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B4BE2108 for ; Mon, 7 Aug 2023 04:38:58 -0700 (PDT) Received: by mail-qv1-xf32.google.com with SMTP id 6a1803df08f44-637aaaf27f1so12430106d6.0 for ; Mon, 07 Aug 2023 04:38:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691408283; x=1692013083; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=X5ij/O+E/bk/tTzX9mgxwiCynzBHcXx4EKtI9EsHayo=; b=EKv30qxqmMa2cVAeRNyBGrML7K3SC58armENYkP264t6eVoOUeEdH/xXr4za0/bH7k Guh2Mrqo1Mxiz1LA7YfDkVHowC4O86ZGKrsRgWa29Kh1lDuDBTE+H1Dz5DPFyA+NQwtU 0OkLPjb/BJRMtUkdeeMHW23Mb0xI49YW99dYxtajcmFIL3OwEaJO6DqBSydcIHBp60lC GyYlZY9t9b3xkLfi6j8yidK1+lFpduf/NEjunCeS2DwiQaUYxMyktL9+UYa16BEq7eJM LFDbNID7K6eSEIDX4AWIrbmaAgSiTosrrDrPc7x6SkkZPnMRQLbjg2NMDJXyMPBQpN+Y 9M6w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691408283; x=1692013083; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=X5ij/O+E/bk/tTzX9mgxwiCynzBHcXx4EKtI9EsHayo=; b=j966zQrW56knJXSF7Dv+XT9Th1JJItrjuhnCscOCK9WrkULErB80cBFKjtosRCy13D HwstKmrp1HNW+OGtch/HX04DMKWoKrvkUkSMCtefNgZFaZC+8dac/7hjQXQNfnghcOhJ eTR2LxFHl/ZyVXsHfGbr74zAB00bHBDgwN7elqQNnbRhvCC6S28gdmlwBYsOeXlh5JBC QpLhwed8ubGYe/vU/WkyXCZjTDKTNFAdYH9nRfq0hFwynqw6wHk0VfXtDWlOSdvvKr/M P2RswQVTTJKRhyfnlX3+knjEjM0hJMmBrhtvDYOvJOC9Td++V1hG79sNabqOXvlJgMVF FvHQ== X-Gm-Message-State: ABy/qLYOGPN7ebFTmeTvg1hRJLr0D2VMZl1Fp0rG8GCWrE9rB5EbegAO nCqj6/exa2K/6MCQ2PrzleaawUO2UXW5FxMMKKI= X-Google-Smtp-Source: AGHT+IH1iUQIXRu8fJbzxUHSh+kWmc44BJdJFh0ZxZy41KSEiq7lusFAb/6JfkXEPdg45Q03TKbByg== X-Received: by 2002:a17:90a:9c3:b0:269:41cf:7212 with SMTP id 61-20020a17090a09c300b0026941cf7212mr4973775pjo.4.1691407200010; Mon, 07 Aug 2023 04:20:00 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.19.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:19:59 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 47/48] mm: shrinker: hold write lock to reparent shrinker nr_deferred Date: Mon, 7 Aug 2023 19:09:35 +0800 Message-Id: <20230807110936.21819-48-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org For now, reparent_shrinker_deferred() is the only holder of read lock of shrinker_rwsem. And it already holds the global cgroup_mutex, so it will not be called in parallel. Therefore, in order to convert shrinker_rwsem to shrinker_mutex later, here we change to hold the write lock of shrinker_rwsem to reparent. Signed-off-by: Qi Zheng --- mm/shrinker.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/shrinker.c b/mm/shrinker.c index fee6f62904fb..a12dede5d21f 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -299,7 +299,7 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) parent = root_mem_cgroup; /* Prevent from concurrent shrinker_info expand */ - down_read(&shrinker_rwsem); + down_write(&shrinker_rwsem); for_each_node(nid) { child_info = shrinker_info_protected(memcg, nid); parent_info = shrinker_info_protected(parent, nid); @@ -312,7 +312,7 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) } } } - up_read(&shrinker_rwsem); + up_write(&shrinker_rwsem); } #else static int shrinker_memcg_alloc(struct shrinker *shrinker) From patchwork Mon Aug 7 11:09:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qi Zheng X-Patchwork-Id: 712893 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBFD1C07E8E for ; Mon, 7 Aug 2023 11:24:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232561AbjHGLYA (ORCPT ); Mon, 7 Aug 2023 07:24:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59478 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232911AbjHGLXf (ORCPT ); Mon, 7 Aug 2023 07:23:35 -0400 Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3BBD93C0E for ; Mon, 7 Aug 2023 04:21:22 -0700 (PDT) Received: by mail-pj1-x102d.google.com with SMTP id 98e67ed59e1d1-2690803a368so591685a91.1 for ; Mon, 07 Aug 2023 04:21:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance.com; s=google; t=1691407213; x=1692012013; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=+T9zoPssix7N9qfaGNa68znQHEAFyeYciCKXdVaHQFo=; b=AEtfoTIxkqzl025wvf9yyl8OvVpV1orZ+7ADsAn8FRdyaHqyneHFGuyJ9jSB6bZbnq 2fmUw9pixcoPu0uENFLV6yEHDyHzbx9PEa4/1QReRkJ9Vdrtq4t36sOjNjHyywd/DJSd tcNSBkDsm06qXT7HTJrbLcS8z4Stb96uz/ah29ckB60DgcXFm35Nrt3Aq6Gzw7rdETno 9DoEQihV9/klwV9kg7jDjWFfkJeTbrOGsUsJTU6XthyBDJ62ZHYmlNs7Ps0ai9BdMXBM XSVKEoVI2ousbfFpSnJdwsS47J/fbQRy8WPmYTGdWXjklXq1QHXWKCVy/72epw0hglU+ Vytw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691407213; x=1692012013; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=+T9zoPssix7N9qfaGNa68znQHEAFyeYciCKXdVaHQFo=; b=bCMjjrW+kJKiXMVG6+AWC+uUrRVbSjyIvUDkt6w7kInn2LCf+1OjAxiXIH61OPZUqe caLA31UKpctM3l+DAAAgHiPNexJn6lxIhwdCXdgLbRA2McACcqjexv4LtgsWMWLSAaTL DGLhNeXmb5Echn+oRHFVMbC0mppPqV+/OnF04G9FhD4bRHjqZHFys6W6pabxMOBAIx7N ivY3vON8qnsiQO1Oljp3mcM3dY4zR7oSMeVw+/jPWyv/z0B3by+Ag2+9eWOnn0vfpRNF pHsd+YY3FIntLwqo24Wan2A2SWQB+7NpeuOgeefCISd0VjzGgrCkjP9toAPD0vvCHIfW Oydg== X-Gm-Message-State: AOJu0YxNr7FWVbguw3kXg/ggkznwLbVNDGbYMy6BHxP9fjR1fkFhligX iVe7gisbEOMtuOh7piYwZGHWvg== X-Google-Smtp-Source: AGHT+IF0evmdLrDlsDTr5Y4TU4NmdZynXgLSKug5uHjkOo8cedCVYEqxJp+s7Xi+ZKGxMcrB3jNS6g== X-Received: by 2002:a17:90a:648:b0:269:60ed:d493 with SMTP id q8-20020a17090a064800b0026960edd493mr1830877pje.4.1691407213020; Mon, 07 Aug 2023 04:20:13 -0700 (PDT) Received: from C02DW0BEMD6R.bytedance.net ([203.208.167.146]) by smtp.gmail.com with ESMTPSA id y13-20020a17090aca8d00b0025be7b69d73sm5861191pjt.12.2023.08.07.04.20.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Aug 2023 04:20:12 -0700 (PDT) From: Qi Zheng To: akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org, muchun.song@linux.dev, simon.horman@corigine.com, dlemoal@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, Qi Zheng Subject: [PATCH v4 48/48] mm: shrinker: convert shrinker_rwsem to mutex Date: Mon, 7 Aug 2023 19:09:36 +0800 Message-Id: <20230807110936.21819-49-zhengqi.arch@bytedance.com> X-Mailer: git-send-email 2.24.3 (Apple Git-128) In-Reply-To: <20230807110936.21819-1-zhengqi.arch@bytedance.com> References: <20230807110936.21819-1-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Now there are no readers of shrinker_rwsem, so we can simply replace it with mutex lock. Signed-off-by: Qi Zheng --- drivers/md/dm-cache-metadata.c | 2 +- fs/super.c | 2 +- mm/shrinker.c | 28 ++++++++++++++-------------- mm/shrinker_debug.c | 14 +++++++------- 4 files changed, 23 insertions(+), 23 deletions(-) diff --git a/drivers/md/dm-cache-metadata.c b/drivers/md/dm-cache-metadata.c index acffed750e3e..9e0c69958587 100644 --- a/drivers/md/dm-cache-metadata.c +++ b/drivers/md/dm-cache-metadata.c @@ -1828,7 +1828,7 @@ int dm_cache_metadata_abort(struct dm_cache_metadata *cmd) * Replacement block manager (new_bm) is created and old_bm destroyed outside of * cmd root_lock to avoid ABBA deadlock that would result (due to life-cycle of * shrinker associated with the block manager's bufio client vs cmd root_lock). - * - must take shrinker_rwsem without holding cmd->root_lock + * - must take shrinker_mutex without holding cmd->root_lock */ new_bm = dm_block_manager_create(cmd->bdev, DM_CACHE_METADATA_BLOCK_SIZE << SECTOR_SHIFT, CACHE_MAX_CONCURRENT_LOCKS); diff --git a/fs/super.c b/fs/super.c index a28193045345..60c2d290c754 100644 --- a/fs/super.c +++ b/fs/super.c @@ -54,7 +54,7 @@ static char *sb_writers_name[SB_FREEZE_LEVELS] = { * One thing we have to be careful of with a per-sb shrinker is that we don't * drop the last active reference to the superblock from within the shrinker. * If that happens we could trigger unregistering the shrinker from within the - * shrinker path and that leads to deadlock on the shrinker_rwsem. Hence we + * shrinker path and that leads to deadlock on the shrinker_mutex. Hence we * take a passive reference to the superblock to avoid this from occurring. */ static unsigned long super_cache_scan(struct shrinker *shrink, diff --git a/mm/shrinker.c b/mm/shrinker.c index a12dede5d21f..3d44a335ef3c 100644 --- a/mm/shrinker.c +++ b/mm/shrinker.c @@ -8,7 +8,7 @@ #include "internal.h" LIST_HEAD(shrinker_list); -DECLARE_RWSEM(shrinker_rwsem); +DEFINE_MUTEX(shrinker_mutex); #ifdef CONFIG_MEMCG static int shrinker_nr_max; @@ -80,7 +80,7 @@ int alloc_shrinker_info(struct mem_cgroup *memcg) int nid, ret = 0; int array_size = 0; - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); array_size = shrinker_unit_size(shrinker_nr_max); for_each_node(nid) { info = kvzalloc_node(sizeof(*info) + array_size, GFP_KERNEL, nid); @@ -91,7 +91,7 @@ int alloc_shrinker_info(struct mem_cgroup *memcg) goto err; rcu_assign_pointer(memcg->nodeinfo[nid]->shrinker_info, info); } - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); return ret; @@ -104,7 +104,7 @@ static struct shrinker_info *shrinker_info_protected(struct mem_cgroup *memcg, int nid) { return rcu_dereference_protected(memcg->nodeinfo[nid]->shrinker_info, - lockdep_is_held(&shrinker_rwsem)); + lockdep_is_held(&shrinker_mutex)); } static struct shrinker_info *shrinker_info_rcu(struct mem_cgroup *memcg, @@ -161,7 +161,7 @@ static int expand_shrinker_info(int new_id) if (!root_mem_cgroup) goto out; - lockdep_assert_held(&shrinker_rwsem); + lockdep_assert_held(&shrinker_mutex); new_size = shrinker_unit_size(new_nr_max); old_size = shrinker_unit_size(shrinker_nr_max); @@ -224,7 +224,7 @@ static int shrinker_memcg_alloc(struct shrinker *shrinker) if (mem_cgroup_disabled()) return -ENOSYS; - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); id = idr_alloc(&shrinker_idr, shrinker, 0, 0, GFP_KERNEL); if (id < 0) goto unlock; @@ -238,7 +238,7 @@ static int shrinker_memcg_alloc(struct shrinker *shrinker) shrinker->id = id; ret = 0; unlock: - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); return ret; } @@ -248,7 +248,7 @@ static void shrinker_memcg_remove(struct shrinker *shrinker) BUG_ON(id < 0); - lockdep_assert_held(&shrinker_rwsem); + lockdep_assert_held(&shrinker_mutex); idr_remove(&shrinker_idr, id); } @@ -299,7 +299,7 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) parent = root_mem_cgroup; /* Prevent from concurrent shrinker_info expand */ - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); for_each_node(nid) { child_info = shrinker_info_protected(memcg, nid); parent_info = shrinker_info_protected(parent, nid); @@ -312,7 +312,7 @@ void reparent_shrinker_deferred(struct mem_cgroup *memcg) } } } - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); } #else static int shrinker_memcg_alloc(struct shrinker *shrinker) @@ -708,11 +708,11 @@ void shrinker_register(struct shrinker *shrinker) return; } - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); list_add_tail_rcu(&shrinker->list, &shrinker_list); shrinker->flags |= SHRINKER_REGISTERED; shrinker_debugfs_add(shrinker); - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); init_completion(&shrinker->done); /* @@ -745,7 +745,7 @@ void shrinker_free(struct shrinker *shrinker) wait_for_completion(&shrinker->done); } - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); if (shrinker->flags & SHRINKER_REGISTERED) { /* * Lookups on the shrinker are over and will fail in the future, @@ -760,7 +760,7 @@ void shrinker_free(struct shrinker *shrinker) if (shrinker->flags & SHRINKER_MEMCG_AWARE) shrinker_memcg_remove(shrinker); - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); if (debugfs_entry) shrinker_debugfs_remove(debugfs_entry, debugfs_id); diff --git a/mm/shrinker_debug.c b/mm/shrinker_debug.c index aa2027075ed9..b698ca9e309e 100644 --- a/mm/shrinker_debug.c +++ b/mm/shrinker_debug.c @@ -7,7 +7,7 @@ #include /* defined in vmscan.c */ -extern struct rw_semaphore shrinker_rwsem; +extern struct mutex shrinker_mutex; extern struct list_head shrinker_list; static DEFINE_IDA(shrinker_debugfs_ida); @@ -163,7 +163,7 @@ int shrinker_debugfs_add(struct shrinker *shrinker) char buf[128]; int id; - lockdep_assert_held(&shrinker_rwsem); + lockdep_assert_held(&shrinker_mutex); /* debugfs isn't initialized yet, add debugfs entries later. */ if (!shrinker_debugfs_root) @@ -220,7 +220,7 @@ int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...) if (!new) return -ENOMEM; - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); old = shrinker->name; shrinker->name = new; @@ -238,7 +238,7 @@ int shrinker_debugfs_rename(struct shrinker *shrinker, const char *fmt, ...) shrinker->debugfs_entry = entry; } - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); kfree_const(old); @@ -251,7 +251,7 @@ struct dentry *shrinker_debugfs_detach(struct shrinker *shrinker, { struct dentry *entry = shrinker->debugfs_entry; - lockdep_assert_held(&shrinker_rwsem); + lockdep_assert_held(&shrinker_mutex); shrinker_debugfs_name_free(shrinker); @@ -279,14 +279,14 @@ static int __init shrinker_debugfs_init(void) shrinker_debugfs_root = dentry; /* Create debugfs entries for shrinkers registered at boot */ - down_write(&shrinker_rwsem); + mutex_lock(&shrinker_mutex); list_for_each_entry(shrinker, &shrinker_list, list) if (!shrinker->debugfs_entry) { ret = shrinker_debugfs_add(shrinker); if (ret) break; } - up_write(&shrinker_rwsem); + mutex_unlock(&shrinker_mutex); return ret; }