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 /**