From patchwork Fri Oct 9 19:49:38 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285910 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0B61C4363D for ; Fri, 9 Oct 2020 20:11:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A26BB2053B for ; Fri, 9 Oct 2020 20:11:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391914AbgJIUKl (ORCPT ); Fri, 9 Oct 2020 16:10:41 -0400 Received: from mga04.intel.com ([192.55.52.120]:43246 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403817AbgJITu7 (ORCPT ); Fri, 9 Oct 2020 15:50:59 -0400 IronPort-SDR: I+kluzUq8pxlBDtt5OqAnT2WCF+BNOozZc8KJ9HRHJVfpcd0kw39MYtQEO55RaZxKxDv2NPRPB 5bQ8ZYnMvMug== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162893218" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162893218" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:50:56 -0700 IronPort-SDR: WlCZORaTV0ocl1yC7IDa4J4IbRZJZvP+KytzS1LtxRNRUTgHeg4W5ZWyzNndx3DpBXRsqL9R3c CQItA3N5s8ig== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="462300571" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:50:55 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 03/58] memremap: Add zone device access protection Date: Fri, 9 Oct 2020 12:49:38 -0700 Message-Id: <20201009195033.3208459-4-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny Device managed memory exposes itself to the kernel direct map which allows stray pointers to access these device memories. Stray pointers to normal memory may result in a crash or other undesirable behavior which, while unfortunate, are usually recoverable with a reboot. Stray access, specifically stray writes, to areas such as non-volatile memory are permanent in nature and thus are more likely to result in permanent user data loss vs stray access to other memory areas. Furthermore, we protect against reads which can help with speculative reads to poison areas as well. But this is a secondary reason. Set up an infrastructure for extra device access protection. Then implement the new protection using the new Protection Keys Supervisor (PKS) on architectures which support it. To enable this extra protection devices specify a flag in the pgmap to indicate that these areas wish to use additional protection. Kernel code which intends to access this memory can do so automatically through the use of the kmap infrastructure calling into dev_access_[enable|disable]() described here. The kmap infrastructure is implemented in a follow on patch. In addition, users can directly enable/disable the access through dev_access_[enable|disable]() if they have a priori knowledge of the type of pages they are accessing. All calls to enable/disable protection flow through dev_access_[enable|disable]() and are nestable by the use of a per task reference count. This reference count does 2 things. 1) Allows a thread to nest calls to disable protection such that the first call to re-enable protection does not 'break' the last access of the pmem device memory. 2) Provides faster performance by avoiding lots of MSR writes. For example, looping over a sequence of pmem pages. In addition, we must ensure the reference count is preserved through an exception so we add the count to irqentry_state_t and save/restore the reference count while giving exceptions their own count should they use a kmap call. The following shows how this works through an exception: ... // ref == 0 dev_access_enable() // ref += 1 ==> disable protection irq() // enable protection // ref = 0 _handler() dev_access_enable() // ref += 1 ==> disable protection dev_access_disable() // ref -= 1 ==> enable protection // WARN_ON(ref != 0) // disable protection do_pmem_thing() // all good here dev_access_disable() // ref -= 1 ==> 0 ==> enable protection ... Nested exceptions operate the same way with each exception storing the interrupted exception state all the way down. The pkey value is never free'ed as this optimizes the implementation to be either on or off using a static branch conditional in the fast paths. Cc: Juri Lelli Cc: Vincent Guittot Cc: Dietmar Eggemann Cc: Steven Rostedt Cc: Ben Segall Cc: Mel Gorman Signed-off-by: Ira Weiny --- arch/x86/entry/common.c | 21 +++++++++ include/linux/entry-common.h | 3 ++ include/linux/memremap.h | 1 + include/linux/mm.h | 43 +++++++++++++++++ include/linux/sched.h | 3 ++ init/init_task.c | 3 ++ kernel/fork.c | 3 ++ mm/Kconfig | 13 ++++++ mm/memremap.c | 90 ++++++++++++++++++++++++++++++++++++ 9 files changed, 180 insertions(+) diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c index 86ad32e0095e..3680724c1a4d 100644 --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -264,12 +264,27 @@ noinstr void idtentry_exit_nmi(struct pt_regs *regs, irqentry_state_t *irq_state * * NOTE That the thread saved PKRS must be preserved separately to ensure * global overrides do not 'stick' on a thread. + * + * Furthermore, Zone Device Access Protection maintains access in a re-entrant + * manner through a reference count which also needs to be maintained should + * exception handlers use those interfaces for memory access. Here we start + * off the exception handler ref count to 0 and ensure it is 0 when the + * exception is done. Then restore it for the interrupted task. */ noinstr void irq_save_pkrs(irqentry_state_t *state) { if (!cpu_feature_enabled(X86_FEATURE_PKS)) return; +#ifdef CONFIG_ZONE_DEVICE_ACCESS_PROTECTION + /* + * Save the ref count of the current running process and set it to 0 + * for any irq users to properly track re-entrance + */ + state->pkrs_ref = current->dev_page_access_ref; + current->dev_page_access_ref = 0; +#endif + /* * The thread_pkrs must be maintained separately to prevent global * overrides from 'sticking' on a thread. @@ -286,6 +301,12 @@ noinstr void irq_restore_pkrs(irqentry_state_t *state) write_pkrs(state->pkrs); current->thread.saved_pkrs = state->thread_pkrs; + +#ifdef CONFIG_ZONE_DEVICE_ACCESS_PROTECTION + WARN_ON_ONCE(current->dev_page_access_ref != 0); + /* Restore the interrupted process reference */ + current->dev_page_access_ref = state->pkrs_ref; +#endif } #endif /* CONFIG_ARCH_HAS_SUPERVISOR_PKEYS */ diff --git a/include/linux/entry-common.h b/include/linux/entry-common.h index c3b361ffa059..06743cce2dbf 100644 --- a/include/linux/entry-common.h +++ b/include/linux/entry-common.h @@ -343,6 +343,9 @@ void irqentry_exit_to_user_mode(struct pt_regs *regs); #ifndef irqentry_state typedef struct irqentry_state { #ifdef CONFIG_ARCH_HAS_SUPERVISOR_PKEYS +#ifdef CONFIG_ZONE_DEVICE_ACCESS_PROTECTION + unsigned int pkrs_ref; +#endif u32 pkrs; u32 thread_pkrs; #endif diff --git a/include/linux/memremap.h b/include/linux/memremap.h index e5862746751b..b6713ee7b218 100644 --- a/include/linux/memremap.h +++ b/include/linux/memremap.h @@ -89,6 +89,7 @@ struct dev_pagemap_ops { }; #define PGMAP_ALTMAP_VALID (1 << 0) +#define PGMAP_PROT_ENABLED (1 << 1) /** * struct dev_pagemap - metadata for ZONE_DEVICE mappings diff --git a/include/linux/mm.h b/include/linux/mm.h index 16b799a0522c..9e845515ff15 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1141,6 +1141,49 @@ static inline bool is_pci_p2pdma_page(const struct page *page) page->pgmap->type == MEMORY_DEVICE_PCI_P2PDMA; } +#ifdef CONFIG_ZONE_DEVICE_ACCESS_PROTECTION +DECLARE_STATIC_KEY_FALSE(dev_protection_static_key); + +/* + * We make page_is_access_protected() as quick as possible. + * 1) If no mappings have been enabled with extra protection we skip this + * entirely + * 2) Skip pages which are not ZONE_DEVICE + * 3) Only then check if this particular page was mapped with extra + * protections. + */ +static inline bool page_is_access_protected(struct page *page) +{ + if (!static_branch_unlikely(&dev_protection_static_key)) + return false; + if (!is_zone_device_page(page)) + return false; + if (page->pgmap->flags & PGMAP_PROT_ENABLED) + return true; + return false; +} + +void __dev_access_enable(bool global); +void __dev_access_disable(bool global); +static __always_inline void dev_access_enable(bool global) +{ + if (static_branch_unlikely(&dev_protection_static_key)) + __dev_access_enable(global); +} +static __always_inline void dev_access_disable(bool global) +{ + if (static_branch_unlikely(&dev_protection_static_key)) + __dev_access_disable(global); +} +#else +static inline bool page_is_access_protected(struct page *page) +{ + return false; +} +static inline void dev_access_enable(bool global) { } +static inline void dev_access_disable(bool global) { } +#endif /* CONFIG_ZONE_DEVICE_ACCESS_PROTECTION */ + /* 127: arbitrary random number, small enough to assemble well */ #define page_ref_zero_or_close_to_overflow(page) \ ((unsigned int) page_ref_count(page) + 127u <= 127u) diff --git a/include/linux/sched.h b/include/linux/sched.h index afe01e232935..25d97ab6c757 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1315,6 +1315,9 @@ struct task_struct { struct callback_head mce_kill_me; #endif +#ifdef CONFIG_ZONE_DEVICE_ACCESS_PROTECTION + unsigned int dev_page_access_ref; +#endif /* * New fields for task_struct should be added above here, so that * they are included in the randomized portion of task_struct. diff --git a/init/init_task.c b/init/init_task.c index f6889fce64af..9b39f25de59b 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -209,6 +209,9 @@ struct task_struct init_task #ifdef CONFIG_SECCOMP .seccomp = { .filter_count = ATOMIC_INIT(0) }, #endif +#ifdef CONFIG_ZONE_DEVICE_ACCESS_PROTECTION + .dev_page_access_ref = 0, +#endif }; EXPORT_SYMBOL(init_task); diff --git a/kernel/fork.c b/kernel/fork.c index da8d360fb032..b6a3ee328a89 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -940,6 +940,9 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node) #ifdef CONFIG_MEMCG tsk->active_memcg = NULL; +#endif +#ifdef CONFIG_ZONE_DEVICE_ACCESS_PROTECTION + tsk->dev_page_access_ref = 0; #endif return tsk; diff --git a/mm/Kconfig b/mm/Kconfig index 1b9bc004d9bc..01dd75720ae6 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -794,6 +794,19 @@ config ZONE_DEVICE If FS_DAX is enabled, then say Y. +config ZONE_DEVICE_ACCESS_PROTECTION + bool "Device memory access protection" + depends on ZONE_DEVICE + depends on ARCH_HAS_SUPERVISOR_PKEYS + + help + Enable the option of having access protections on device memory + areas. This protects against access to device memory which is not + intended such as stray writes. This feature is particularly useful + to protect against corruption of persistent memory. + + If in doubt, say 'Y'. + config DEV_PAGEMAP_OPS bool diff --git a/mm/memremap.c b/mm/memremap.c index fbfc79fd9c24..edad2aa0bd24 100644 --- a/mm/memremap.c +++ b/mm/memremap.c @@ -6,12 +6,16 @@ #include #include #include +#include #include #include #include #include #include #include +#include + +#define PKEY_INVALID (INT_MIN) static DEFINE_XARRAY(pgmap_array); @@ -67,6 +71,89 @@ static void devmap_managed_enable_put(void) } #endif /* CONFIG_DEV_PAGEMAP_OPS */ +#ifdef CONFIG_ZONE_DEVICE_ACCESS_PROTECTION +/* + * Note; all devices which have asked for protections share the same key. The + * key may, or may not, have been provided by the core. If not, protection + * will remain disabled. The key acquisition is attempted at init time and + * never again. So we don't have to worry about dev_page_pkey changing. + */ +static int dev_page_pkey = PKEY_INVALID; +DEFINE_STATIC_KEY_FALSE(dev_protection_static_key); +EXPORT_SYMBOL(dev_protection_static_key); + +static pgprot_t dev_pgprot_get(struct dev_pagemap *pgmap, pgprot_t prot) +{ + if (pgmap->flags & PGMAP_PROT_ENABLED && dev_page_pkey != PKEY_INVALID) { + pgprotval_t val = pgprot_val(prot); + + static_branch_inc(&dev_protection_static_key); + prot = __pgprot(val | _PAGE_PKEY(dev_page_pkey)); + } + return prot; +} + +static void dev_pgprot_put(struct dev_pagemap *pgmap) +{ + if (pgmap->flags & PGMAP_PROT_ENABLED && dev_page_pkey != PKEY_INVALID) + static_branch_dec(&dev_protection_static_key); +} + +void __dev_access_disable(bool global) +{ + unsigned long flags; + + local_irq_save(flags); + if (!--current->dev_page_access_ref) + pks_mknoaccess(dev_page_pkey, global); + local_irq_restore(flags); +} +EXPORT_SYMBOL_GPL(__dev_access_disable); + +void __dev_access_enable(bool global) +{ + unsigned long flags; + + local_irq_save(flags); + /* 0 clears the PKEY_DISABLE_ACCESS bit, allowing access */ + if (!current->dev_page_access_ref++) + pks_mkrdwr(dev_page_pkey, global); + local_irq_restore(flags); +} +EXPORT_SYMBOL_GPL(__dev_access_enable); + +/** + * dev_access_protection_init: Configure a PKS key domain for device pages + * + * The domain defaults to the protected state. Device page mappings should set + * the PGMAP_PROT_ENABLED flag when mapping pages. + * + * Note the pkey is never free'ed. This is run at init time and we either get + * the key or we do not. We need to do this to maintian a constant key (or + * not) as device memory is added or removed. + */ +static int __init __dev_access_protection_init(void) +{ + int pkey = pks_key_alloc("Device Memory"); + + if (pkey < 0) + return 0; + + dev_page_pkey = pkey; + + return 0; +} +subsys_initcall(__dev_access_protection_init); +#else +static pgprot_t dev_pgprot_get(struct dev_pagemap *pgmap, pgprot_t prot) +{ + return prot; +} +static void dev_pgprot_put(struct dev_pagemap *pgmap) +{ +} +#endif /* CONFIG_ZONE_DEVICE_ACCESS_PROTECTION */ + static void pgmap_array_delete(struct resource *res) { xa_store_range(&pgmap_array, PHYS_PFN(res->start), PHYS_PFN(res->end), @@ -156,6 +243,7 @@ void memunmap_pages(struct dev_pagemap *pgmap) pgmap_array_delete(res); WARN_ONCE(pgmap->altmap.alloc, "failed to free all reserved pages\n"); devmap_managed_enable_put(); + dev_pgprot_put(pgmap); } EXPORT_SYMBOL_GPL(memunmap_pages); @@ -191,6 +279,8 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid) int error, is_ram; bool need_devmap_managed = true; + params.pgprot = dev_pgprot_get(pgmap, params.pgprot); + switch (pgmap->type) { case MEMORY_DEVICE_PRIVATE: if (!IS_ENABLED(CONFIG_DEVICE_PRIVATE)) { From patchwork Fri Oct 9 19:49:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285911 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E3639C2D0AE for ; Fri, 9 Oct 2020 20:10:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 93B6720659 for ; Fri, 9 Oct 2020 20:10:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391547AbgJIUKI (ORCPT ); Fri, 9 Oct 2020 16:10:08 -0400 Received: from mga11.intel.com ([192.55.52.93]:40406 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403832AbgJITvG (ORCPT ); Fri, 9 Oct 2020 15:51:06 -0400 IronPort-SDR: SD9nz5fTmWZyBOKnNyNhFLCkSRCkJ1a/XNJy/OvFfOQBQwdny4dR7EruCRRxmv68e4U8o8tfxx MKHZNHFKQmKA== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162067781" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162067781" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:03 -0700 IronPort-SDR: Zj7B8Ym6Opm+j7NgzILIxHvFMHLpJ+KeG5qMdRlGsqJzYlMhgHY+wciO+/VIwDrpca7gdal3tS LaUxL8Xa1x8w== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="343971995" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:02 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Randy Dunlap , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 05/58] kmap: Introduce k[un]map_thread Date: Fri, 9 Oct 2020 12:49:40 -0700 Message-Id: <20201009195033.3208459-6-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny To correctly support the semantics of kmap() with Kernel protection keys (PKS), kmap() may be required to set the protections on multiple processors (globally). Enabling PKS globally can be very expensive depending on the requested operation. Furthermore, enabling a domain globally reduces the protection afforded by PKS. Most kmap() (Aprox 209 of 229) callers use the map within a single thread and have no need for the protection domain to be enabled globally. However, the remaining callers do not follow this pattern and, as best I can tell, expect the mapping to be 'global' and available to any thread who may access the mapping.[1] We don't anticipate global mappings to pmem, however in general there is a danger in changing the semantics of kmap(). Effectively, this would cause an unresolved page fault with little to no information about why the failure occurred. To resolve this a number of options were considered. 1) Attempt to change all the thread local kmap() calls to kmap_atomic()[2] 2) Introduce a flags parameter to kmap() to indicate if the mapping should be global or not 3) Change ~20 call sites to 'kmap_global()' to indicate that they require a global enablement of the pages. 4) Change ~209 call sites to 'kmap_thread()' to indicate that the mapping is to be used within that thread of execution only Option 1 is simply not feasible. Option 2 would require all of the call sites of kmap() to change. Option 3 seems like a good minimal change but there is a danger that new code may miss the semantic change of kmap() and not get the behavior the developer intended. Therefore, #4 was chosen. Subsequent patches will convert most ~90% of the kmap callers to this new call leaving about 10% of the existing kmap callers to enable PKS globally. Cc: Randy Dunlap Signed-off-by: Ira Weiny --- include/linux/highmem.h | 34 ++++++++++++++++++++++++++-------- 1 file changed, 26 insertions(+), 8 deletions(-) diff --git a/include/linux/highmem.h b/include/linux/highmem.h index 2a9806e3b8d2..ef7813544719 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -60,7 +60,7 @@ static inline void kmap_flush_tlb(unsigned long addr) { } #endif void *kmap_high(struct page *page); -static inline void *kmap(struct page *page) +static inline void *__kmap(struct page *page, bool global) { void *addr; @@ -74,20 +74,20 @@ static inline void *kmap(struct page *page) * Even non-highmem pages may have additional access protections which * need to be checked and potentially enabled. */ - dev_page_enable_access(page, true); + dev_page_enable_access(page, global); return addr; } void kunmap_high(struct page *page); -static inline void kunmap(struct page *page) +static inline void __kunmap(struct page *page, bool global) { might_sleep(); /* * Even non-highmem pages may have additional access protections which * need to be checked and potentially disabled. */ - dev_page_disable_access(page, true); + dev_page_disable_access(page, global); if (!PageHighMem(page)) return; kunmap_high(page); @@ -160,10 +160,10 @@ static inline struct page *kmap_to_page(void *addr) static inline unsigned long totalhigh_pages(void) { return 0UL; } -static inline void *kmap(struct page *page) +static inline void *__kmap(struct page *page, bool global) { might_sleep(); - dev_page_enable_access(page, true); + dev_page_enable_access(page, global); return page_address(page); } @@ -171,9 +171,9 @@ static inline void kunmap_high(struct page *page) { } -static inline void kunmap(struct page *page) +static inline void __kunmap(struct page *page, bool global) { - dev_page_disable_access(page, true); + dev_page_disable_access(page, global); #ifdef ARCH_HAS_FLUSH_ON_KUNMAP kunmap_flush_on_unmap(page_address(page)); #endif @@ -238,6 +238,24 @@ static inline void kmap_atomic_idx_pop(void) #endif +static inline void *kmap(struct page *page) +{ + return __kmap(page, true); +} +static inline void kunmap(struct page *page) +{ + __kunmap(page, true); +} + +static inline void *kmap_thread(struct page *page) +{ + return __kmap(page, false); +} +static inline void kunmap_thread(struct page *page) +{ + __kunmap(page, false); +} + /* * Prevent people trying to call kunmap_atomic() as if it were kunmap() * kunmap_atomic() should get the return value of kmap_atomic, not the page. From patchwork Fri Oct 9 19:49:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285938 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E092BC8300C for ; Fri, 9 Oct 2020 19:51:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B2228222C3 for ; Fri, 9 Oct 2020 19:51:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403933AbgJITv2 (ORCPT ); Fri, 9 Oct 2020 15:51:28 -0400 Received: from mga11.intel.com ([192.55.52.93]:40417 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403855AbgJITvJ (ORCPT ); Fri, 9 Oct 2020 15:51:09 -0400 IronPort-SDR: 5U3LdD8JD30Qiz2Xw/HSuDHohT2eTnGXIdf1M2uidm99cBYL2HhALZbtzhz8H9lsGnLyzZh9ts a1oLaFItUWyw== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162067789" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162067789" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:07 -0700 IronPort-SDR: q86t8daZNt+V6d8RNukEYKSCMEs+oCo1U1vd6Yq1DOlnqrvHVUOvZ3CGMAsBzz1plldsK41yyY 6uUXC42AACQg== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="317146961" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:06 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 06/58] kmap: Introduce k[un]map_thread debugging Date: Fri, 9 Oct 2020 12:49:41 -0700 Message-Id: <20201009195033.3208459-7-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny Most kmap() callers use the map within a single thread and have no need for the protection domain to be enabled globally. To differentiate these kmap users, new k[un]map_thread() calls were introduced which are thread local. To aid in debugging the new use of kmap_thread(), add a reference count, a check on that count, and tracing to ID where mapping errors occur. Cc: Juri Lelli Cc: Vincent Guittot Cc: Dietmar Eggemann Cc: Steven Rostedt Cc: Ben Segall Cc: Mel Gorman Signed-off-by: Ira Weiny --- include/linux/highmem.h | 5 +++ include/linux/sched.h | 5 +++ include/trace/events/kmap_thread.h | 56 ++++++++++++++++++++++++++++++ init/init_task.c | 3 ++ kernel/fork.c | 15 ++++++++ lib/Kconfig.debug | 8 +++++ mm/debug.c | 23 ++++++++++++ 7 files changed, 115 insertions(+) create mode 100644 include/trace/events/kmap_thread.h diff --git a/include/linux/highmem.h b/include/linux/highmem.h index ef7813544719..22d1c000802e 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -247,6 +247,10 @@ static inline void kunmap(struct page *page) __kunmap(page, true); } +#ifdef CONFIG_DEBUG_KMAP_THREAD +void *kmap_thread(struct page *page); +void kunmap_thread(struct page *page); +#else static inline void *kmap_thread(struct page *page) { return __kmap(page, false); @@ -255,6 +259,7 @@ static inline void kunmap_thread(struct page *page) { __kunmap(page, false); } +#endif /* * Prevent people trying to call kunmap_atomic() as if it were kunmap() diff --git a/include/linux/sched.h b/include/linux/sched.h index 25d97ab6c757..4627ea4a49e6 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1318,6 +1318,11 @@ struct task_struct { #ifdef CONFIG_ZONE_DEVICE_ACCESS_PROTECTION unsigned int dev_page_access_ref; #endif + +#ifdef CONFIG_DEBUG_KMAP_THREAD + unsigned int kmap_thread_cnt; +#endif + /* * New fields for task_struct should be added above here, so that * they are included in the randomized portion of task_struct. diff --git a/include/trace/events/kmap_thread.h b/include/trace/events/kmap_thread.h new file mode 100644 index 000000000000..e7143cfe0daf --- /dev/null +++ b/include/trace/events/kmap_thread.h @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */ + +/* + * Copyright (c) 2020 Intel Corporation. All rights reserved. + * + */ + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM kmap_thread + +#if !defined(_TRACE_KMAP_THREAD_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_KMAP_THREAD_H + +#include + +DECLARE_EVENT_CLASS(kmap_thread_template, + TP_PROTO(struct task_struct *tsk, struct page *page, + void *caller_addr, int cnt), + TP_ARGS(tsk, page, caller_addr, cnt), + + TP_STRUCT__entry( + __field(int, pid) + __field(struct page *, page) + __field(void *, caller_addr) + __field(int, cnt) + ), + + TP_fast_assign( + __entry->pid = tsk->pid; + __entry->page = page; + __entry->caller_addr = caller_addr; + __entry->cnt = cnt; + ), + + TP_printk("PID %d; (%d) %pS %p", + __entry->pid, + __entry->cnt, + __entry->caller_addr, + __entry->page + ) +); + +DEFINE_EVENT(kmap_thread_template, kmap_thread, + TP_PROTO(struct task_struct *tsk, struct page *page, + void *caller_addr, int cnt), + TP_ARGS(tsk, page, caller_addr, cnt)); + +DEFINE_EVENT(kmap_thread_template, kunmap_thread, + TP_PROTO(struct task_struct *tsk, struct page *page, + void *caller_addr, int cnt), + TP_ARGS(tsk, page, caller_addr, cnt)); + + +#endif /* _TRACE_KMAP_THREAD_H */ + +#include diff --git a/init/init_task.c b/init/init_task.c index 9b39f25de59b..19f09965eb34 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -212,6 +212,9 @@ struct task_struct init_task #ifdef CONFIG_ZONE_DEVICE_ACCESS_PROTECTION .dev_page_access_ref = 0, #endif +#ifdef CONFIG_DEBUG_KMAP_THREAD + .kmap_thread_cnt = 0, +#endif }; EXPORT_SYMBOL(init_task); diff --git a/kernel/fork.c b/kernel/fork.c index b6a3ee328a89..2c66e49b7614 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -722,6 +722,17 @@ static inline void put_signal_struct(struct signal_struct *sig) free_signal_struct(sig); } +#ifdef CONFIG_DEBUG_KMAP_THREAD +static void check_outstanding_kmap_thread(struct task_struct *tsk) +{ + if (tsk->kmap_thread_cnt) + pr_warn(KERN_ERR "WARNING: PID %d; Failed to kunmap_thread() [cnt %d]\n", + tsk->pid, tsk->kmap_thread_cnt); +} +#else +static void check_outstanding_kmap_thread(struct task_struct *tsk) { } +#endif + void __put_task_struct(struct task_struct *tsk) { WARN_ON(!tsk->exit_state); @@ -734,6 +745,7 @@ void __put_task_struct(struct task_struct *tsk) exit_creds(tsk); delayacct_tsk_free(tsk); put_signal_struct(tsk->signal); + check_outstanding_kmap_thread(tsk); if (!profile_handoff_task(tsk)) free_task(tsk); @@ -943,6 +955,9 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node) #endif #ifdef CONFIG_ZONE_DEVICE_ACCESS_PROTECTION tsk->dev_page_access_ref = 0; +#endif +#ifdef CONFIG_DEBUG_KMAP_THREAD + tsk->kmap_thread_cnt = 0; #endif return tsk; diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index f015c09ba5a1..6507b43d5b0c 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -858,6 +858,14 @@ config DEBUG_HIGHMEM This option enables additional error checking for high memory systems. Disable for production systems. +config DEBUG_KMAP_THREAD + bool "Kmap debugging" + depends on DEBUG_KERNEL + help + This option enables additional error checking for kernel mapping code + specifically the k[un]map_thread() calls. Disable for production + systems. + config HAVE_DEBUG_STACKOVERFLOW bool diff --git a/mm/debug.c b/mm/debug.c index ca8d1cacdecc..68d186f3570e 100644 --- a/mm/debug.c +++ b/mm/debug.c @@ -320,3 +320,26 @@ void page_init_poison(struct page *page, size_t size) } EXPORT_SYMBOL_GPL(page_init_poison); #endif /* CONFIG_DEBUG_VM */ + +#define CREATE_TRACE_POINTS +#include + +#ifdef CONFIG_DEBUG_KMAP_THREAD +void *kmap_thread(struct page *page) +{ + trace_kmap_thread(current, page, __builtin_return_address(0), + current->kmap_thread_cnt); + current->kmap_thread_cnt++; + return __kmap(page, false); +} +EXPORT_SYMBOL_GPL(kmap_thread); + +void kunmap_thread(struct page *page) +{ + __kunmap(page, false); + current->kmap_thread_cnt--; + trace_kunmap_thread(current, page, __builtin_return_address(0), + current->kmap_thread_cnt); +} +EXPORT_SYMBOL_GPL(kunmap_thread); +#endif From patchwork Fri Oct 9 19:49:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285913 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7AE9C43457 for ; Fri, 9 Oct 2020 20:09:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A72102067D for ; Fri, 9 Oct 2020 20:09:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391790AbgJIUJB (ORCPT ); Fri, 9 Oct 2020 16:09:01 -0400 Received: from mga03.intel.com ([134.134.136.65]:25936 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403924AbgJITv3 (ORCPT ); Fri, 9 Oct 2020 15:51:29 -0400 IronPort-SDR: y57ejaJgVBNlpT3G8VL+eb/8qirNhMK6yqdMgqA2Zofe3N1jmyHJKpOn1cxbYcjftnOrosB3AT yDtdD/JZt5Pw== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="165592018" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="165592018" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:11 -0700 IronPort-SDR: 7ZsxuYrd4RIh+I9L87qE8QKpDxHdxlIArpw96UL8x0WQ0i4hLag3NZ1m816qhb9i0FMTl4f1za dG2KA2sC/NWA== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="312652519" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga003-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:09 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Jens Axboe , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 07/58] drivers/drbd: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:49:42 -0700 Message-Id: <20201009195033.3208459-8-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this driver are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Jens Axboe Signed-off-by: Ira Weiny --- drivers/block/drbd/drbd_main.c | 4 ++-- drivers/block/drbd/drbd_receiver.c | 12 ++++++------ 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 573dbf6f0c31..f0d0c6b0745e 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -1532,9 +1532,9 @@ static int _drbd_no_send_page(struct drbd_peer_device *peer_device, struct page int err; socket = peer_device->connection->data.socket; - addr = kmap(page) + offset; + addr = kmap_thread(page) + offset; err = drbd_send_all(peer_device->connection, socket, addr, size, msg_flags); - kunmap(page); + kunmap_thread(page); if (!err) peer_device->device->send_cnt += size >> 9; return err; diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 422363daa618..4704bc0564e2 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -1951,13 +1951,13 @@ read_in_block(struct drbd_peer_device *peer_device, u64 id, sector_t sector, page = peer_req->pages; page_chain_for_each(page) { unsigned len = min_t(int, ds, PAGE_SIZE); - data = kmap(page); + data = kmap_thread(page); err = drbd_recv_all_warn(peer_device->connection, data, len); if (drbd_insert_fault(device, DRBD_FAULT_RECEIVE)) { drbd_err(device, "Fault injection: Corrupting data on receive\n"); data[0] = data[0] ^ (unsigned long)-1; } - kunmap(page); + kunmap_thread(page); if (err) { drbd_free_peer_req(device, peer_req); return NULL; @@ -1992,7 +1992,7 @@ static int drbd_drain_block(struct drbd_peer_device *peer_device, int data_size) page = drbd_alloc_pages(peer_device, 1, 1); - data = kmap(page); + data = kmap_thread(page); while (data_size) { unsigned int len = min_t(int, data_size, PAGE_SIZE); @@ -2001,7 +2001,7 @@ static int drbd_drain_block(struct drbd_peer_device *peer_device, int data_size) break; data_size -= len; } - kunmap(page); + kunmap_thread(page); drbd_free_pages(peer_device->device, page, 0); return err; } @@ -2033,10 +2033,10 @@ static int recv_dless_read(struct drbd_peer_device *peer_device, struct drbd_req D_ASSERT(peer_device->device, sector == bio->bi_iter.bi_sector); bio_for_each_segment(bvec, bio, iter) { - void *mapped = kmap(bvec.bv_page) + bvec.bv_offset; + void *mapped = kmap_thread(bvec.bv_page) + bvec.bv_offset; expect = min_t(int, data_size, bvec.bv_len); err = drbd_recv_all_warn(peer_device->connection, mapped, expect); - kunmap(bvec.bv_page); + kunmap_thread(bvec.bv_page); if (err) return err; data_size -= expect; From patchwork Fri Oct 9 19:49:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285912 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 12660C433DF for ; Fri, 9 Oct 2020 20:09:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C36B3206A5 for ; Fri, 9 Oct 2020 20:09:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391424AbgJIUJA (ORCPT ); Fri, 9 Oct 2020 16:09:00 -0400 Received: from mga12.intel.com ([192.55.52.136]:29124 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390851AbgJITvS (ORCPT ); Fri, 9 Oct 2020 15:51:18 -0400 IronPort-SDR: BjVNbGWEsRp5ob82NyuDF9C0xKEegG65A+JRryG4Nh+TwGmSJ7KHpML9WJ4YeWqD9WoRDB2csA ScUnXHy+dHGw== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="144850649" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="144850649" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:16 -0700 IronPort-SDR: JrRKqLJV6Da/4fMbj+O46I413eP5nzJr39umbL7Y1s6mKMem5hJdGDAmJBrAS4XWsKikzHiU+3 eSwE6XBZdj5A== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="518800998" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:15 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Luis Chamberlain , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 08/58] drivers/firmware_loader: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:49:43 -0700 Message-Id: <20201009195033.3208459-9-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this driver are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Luis Chamberlain Signed-off-by: Ira Weiny --- drivers/base/firmware_loader/fallback.c | 4 ++-- drivers/base/firmware_loader/main.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c index 283ca2de76d4..22dea9ba7a37 100644 --- a/drivers/base/firmware_loader/fallback.c +++ b/drivers/base/firmware_loader/fallback.c @@ -322,14 +322,14 @@ static void firmware_rw(struct fw_priv *fw_priv, char *buffer, int page_ofs = offset & (PAGE_SIZE-1); int page_cnt = min_t(size_t, PAGE_SIZE - page_ofs, count); - page_data = kmap(fw_priv->pages[page_nr]); + page_data = kmap_thread(fw_priv->pages[page_nr]); if (read) memcpy(buffer, page_data + page_ofs, page_cnt); else memcpy(page_data + page_ofs, buffer, page_cnt); - kunmap(fw_priv->pages[page_nr]); + kunmap_thread(fw_priv->pages[page_nr]); buffer += page_cnt; offset += page_cnt; count -= page_cnt; diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c index 63b9714a0154..cc884c9f8742 100644 --- a/drivers/base/firmware_loader/main.c +++ b/drivers/base/firmware_loader/main.c @@ -409,11 +409,11 @@ static int fw_decompress_xz_pages(struct device *dev, struct fw_priv *fw_priv, /* decompress onto the new allocated page */ page = fw_priv->pages[fw_priv->nr_pages - 1]; - xz_buf.out = kmap(page); + xz_buf.out = kmap_thread(page); xz_buf.out_pos = 0; xz_buf.out_size = PAGE_SIZE; xz_ret = xz_dec_run(xz_dec, &xz_buf); - kunmap(page); + kunmap_thread(page); fw_priv->size += xz_buf.out_pos; /* partial decompression means either end or error */ if (xz_buf.out_pos != PAGE_SIZE) From patchwork Fri Oct 9 19:49:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285937 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1B75C83BB1 for ; Fri, 9 Oct 2020 19:52:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4ED4C223FB for ; Fri, 9 Oct 2020 19:52:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390860AbgJITvs (ORCPT ); Fri, 9 Oct 2020 15:51:48 -0400 Received: from mga17.intel.com ([192.55.52.151]:33909 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403811AbgJITvV (ORCPT ); Fri, 9 Oct 2020 15:51:21 -0400 IronPort-SDR: gAinJeSUNfpg+wR4xJTZtqPlJf7JMSP7H+uP85nCsIR2xz1K+nAlaJyBRxijlJk7TheVMDYWX9 xQ4cQk3mxjQA== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="145397269" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="145397269" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:19 -0700 IronPort-SDR: 5T2OCVzeHkG6wr08UcIl5CMQca5a2EWHDQvUbsMI5eegPrFwWedcb1Yb3fuBoEZmXZa2FGZF8Z Z3c1XDGR3/oA== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="354958923" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:19 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , David Airlie , Daniel Vetter , Patrik Jakobsson , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 09/58] drivers/gpu: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:49:44 -0700 Message-Id: <20201009195033.3208459-10-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny These kmap() calls in the gpu stack are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: David Airlie Cc: Daniel Vetter Cc: Patrik Jakobsson Signed-off-by: Ira Weiny Acked-by: Daniel Vetter --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 12 ++++++------ drivers/gpu/drm/gma500/gma_display.c | 4 ++-- drivers/gpu/drm/gma500/mmu.c | 10 +++++----- drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 4 ++-- .../gpu/drm/i915/gem/selftests/i915_gem_context.c | 4 ++-- drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c | 8 ++++---- drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c | 4 ++-- drivers/gpu/drm/i915/gt/intel_gtt.c | 4 ++-- drivers/gpu/drm/i915/gt/shmem_utils.c | 4 ++-- drivers/gpu/drm/i915/i915_gem.c | 8 ++++---- drivers/gpu/drm/i915/i915_gpu_error.c | 4 ++-- drivers/gpu/drm/i915/selftests/i915_perf.c | 4 ++-- drivers/gpu/drm/radeon/radeon_ttm.c | 4 ++-- 13 files changed, 37 insertions(+), 37 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 978bae731398..bd564bccb7a3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -2437,11 +2437,11 @@ static ssize_t amdgpu_ttm_gtt_read(struct file *f, char __user *buf, page = adev->gart.pages[p]; if (page) { - ptr = kmap(page); + ptr = kmap_thread(page); ptr += off; r = copy_to_user(buf, ptr, cur_size); - kunmap(adev->gart.pages[p]); + kunmap_thread(adev->gart.pages[p]); } else r = clear_user(buf, cur_size); @@ -2507,9 +2507,9 @@ static ssize_t amdgpu_iomem_read(struct file *f, char __user *buf, if (p->mapping != adev->mman.bdev.dev_mapping) return -EPERM; - ptr = kmap(p); + ptr = kmap_thread(p); r = copy_to_user(buf, ptr + off, bytes); - kunmap(p); + kunmap_thread(p); if (r) return -EFAULT; @@ -2558,9 +2558,9 @@ static ssize_t amdgpu_iomem_write(struct file *f, const char __user *buf, if (p->mapping != adev->mman.bdev.dev_mapping) return -EPERM; - ptr = kmap(p); + ptr = kmap_thread(p); r = copy_from_user(ptr + off, buf, bytes); - kunmap(p); + kunmap_thread(p); if (r) return -EFAULT; diff --git a/drivers/gpu/drm/gma500/gma_display.c b/drivers/gpu/drm/gma500/gma_display.c index 3df6d6e850f5..35f4e55c941f 100644 --- a/drivers/gpu/drm/gma500/gma_display.c +++ b/drivers/gpu/drm/gma500/gma_display.c @@ -400,9 +400,9 @@ int gma_crtc_cursor_set(struct drm_crtc *crtc, /* Copy the cursor to cursor mem */ tmp_dst = dev_priv->vram_addr + cursor_gt->offset; for (i = 0; i < cursor_pages; i++) { - tmp_src = kmap(gt->pages[i]); + tmp_src = kmap_thread(gt->pages[i]); memcpy(tmp_dst, tmp_src, PAGE_SIZE); - kunmap(gt->pages[i]); + kunmap_thread(gt->pages[i]); tmp_dst += PAGE_SIZE; } diff --git a/drivers/gpu/drm/gma500/mmu.c b/drivers/gpu/drm/gma500/mmu.c index 505044c9a673..fba7a3a461fd 100644 --- a/drivers/gpu/drm/gma500/mmu.c +++ b/drivers/gpu/drm/gma500/mmu.c @@ -192,20 +192,20 @@ struct psb_mmu_pd *psb_mmu_alloc_pd(struct psb_mmu_driver *driver, pd->invalid_pte = 0; } - v = kmap(pd->dummy_pt); + v = kmap_thread(pd->dummy_pt); for (i = 0; i < (PAGE_SIZE / sizeof(uint32_t)); ++i) v[i] = pd->invalid_pte; - kunmap(pd->dummy_pt); + kunmap_thread(pd->dummy_pt); - v = kmap(pd->p); + v = kmap_thread(pd->p); for (i = 0; i < (PAGE_SIZE / sizeof(uint32_t)); ++i) v[i] = pd->invalid_pde; - kunmap(pd->p); + kunmap_thread(pd->p); clear_page(kmap(pd->dummy_page)); - kunmap(pd->dummy_page); + kunmap_thread(pd->dummy_page); pd->tables = vmalloc_user(sizeof(struct psb_mmu_pt *) * 1024); if (!pd->tables) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c index 38113d3c0138..274424795fb7 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c @@ -566,9 +566,9 @@ i915_gem_object_create_shmem_from_data(struct drm_i915_private *dev_priv, if (err < 0) goto fail; - vaddr = kmap(page); + vaddr = kmap_thread(page); memcpy(vaddr, data, len); - kunmap(page); + kunmap_thread(page); err = pagecache_write_end(file, file->f_mapping, offset, len, len, diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c index 7ffc3c751432..b466c677d007 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c @@ -1754,7 +1754,7 @@ static int check_scratch_page(struct i915_gem_context *ctx, u32 *out) return -EINVAL; } - vaddr = kmap(page); + vaddr = kmap_thread(page); if (!vaddr) { pr_err("No (mappable) scratch page!\n"); return -EINVAL; @@ -1765,7 +1765,7 @@ static int check_scratch_page(struct i915_gem_context *ctx, u32 *out) pr_err("Inconsistent initial state of scratch page!\n"); err = -EINVAL; } - kunmap(page); + kunmap_thread(page); return err; } diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c index 9c7402ce5bf9..447df22e2e06 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c @@ -143,7 +143,7 @@ static int check_partial_mapping(struct drm_i915_gem_object *obj, intel_gt_flush_ggtt_writes(&to_i915(obj->base.dev)->gt); p = i915_gem_object_get_page(obj, offset >> PAGE_SHIFT); - cpu = kmap(p) + offset_in_page(offset); + cpu = kmap_thread(p) + offset_in_page(offset); drm_clflush_virt_range(cpu, sizeof(*cpu)); if (*cpu != (u32)page) { pr_err("Partial view for %lu [%u] (offset=%llu, size=%u [%llu, row size %u], fence=%d, tiling=%d, stride=%d) misalignment, expected write to page (%llu + %u [0x%llx]) of 0x%x, found 0x%x\n", @@ -161,7 +161,7 @@ static int check_partial_mapping(struct drm_i915_gem_object *obj, } *cpu = 0; drm_clflush_virt_range(cpu, sizeof(*cpu)); - kunmap(p); + kunmap_thread(p); out: __i915_vma_put(vma); @@ -236,7 +236,7 @@ static int check_partial_mappings(struct drm_i915_gem_object *obj, intel_gt_flush_ggtt_writes(&to_i915(obj->base.dev)->gt); p = i915_gem_object_get_page(obj, offset >> PAGE_SHIFT); - cpu = kmap(p) + offset_in_page(offset); + cpu = kmap_thread(p) + offset_in_page(offset); drm_clflush_virt_range(cpu, sizeof(*cpu)); if (*cpu != (u32)page) { pr_err("Partial view for %lu [%u] (offset=%llu, size=%u [%llu, row size %u], fence=%d, tiling=%d, stride=%d) misalignment, expected write to page (%llu + %u [0x%llx]) of 0x%x, found 0x%x\n", @@ -254,7 +254,7 @@ static int check_partial_mappings(struct drm_i915_gem_object *obj, } *cpu = 0; drm_clflush_virt_range(cpu, sizeof(*cpu)); - kunmap(p); + kunmap_thread(p); if (err) return err; diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c b/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c index 7fb36b12fe7a..38da348282f1 100644 --- a/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c +++ b/drivers/gpu/drm/i915/gt/intel_ggtt_fencing.c @@ -731,7 +731,7 @@ static void swizzle_page(struct page *page) char *vaddr; int i; - vaddr = kmap(page); + vaddr = kmap_thread(page); for (i = 0; i < PAGE_SIZE; i += 128) { memcpy(temp, &vaddr[i], 64); @@ -739,7 +739,7 @@ static void swizzle_page(struct page *page) memcpy(&vaddr[i + 64], temp, 64); } - kunmap(page); + kunmap_thread(page); } /** diff --git a/drivers/gpu/drm/i915/gt/intel_gtt.c b/drivers/gpu/drm/i915/gt/intel_gtt.c index 2a72cce63fd9..4cfb24e9ed62 100644 --- a/drivers/gpu/drm/i915/gt/intel_gtt.c +++ b/drivers/gpu/drm/i915/gt/intel_gtt.c @@ -312,9 +312,9 @@ static void poison_scratch_page(struct page *page, unsigned long size) do { void *vaddr; - vaddr = kmap(page); + vaddr = kmap_thread(page); memset(vaddr, POISON_FREE, PAGE_SIZE); - kunmap(page); + kunmap_thread(page); page = pfn_to_page(page_to_pfn(page) + 1); size -= PAGE_SIZE; diff --git a/drivers/gpu/drm/i915/gt/shmem_utils.c b/drivers/gpu/drm/i915/gt/shmem_utils.c index 43c7acbdc79d..a40d3130cebf 100644 --- a/drivers/gpu/drm/i915/gt/shmem_utils.c +++ b/drivers/gpu/drm/i915/gt/shmem_utils.c @@ -142,12 +142,12 @@ static int __shmem_rw(struct file *file, loff_t off, if (IS_ERR(page)) return PTR_ERR(page); - vaddr = kmap(page); + vaddr = kmap_thread(page); if (write) memcpy(vaddr + offset_in_page(off), ptr, this); else memcpy(ptr, vaddr + offset_in_page(off), this); - kunmap(page); + kunmap_thread(page); put_page(page); len -= this; diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 9aa3066cb75d..cae8300fd224 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -312,14 +312,14 @@ shmem_pread(struct page *page, int offset, int len, char __user *user_data, char *vaddr; int ret; - vaddr = kmap(page); + vaddr = kmap_thread(page); if (needs_clflush) drm_clflush_virt_range(vaddr + offset, len); ret = __copy_to_user(user_data, vaddr + offset, len); - kunmap(page); + kunmap_thread(page); return ret ? -EFAULT : 0; } @@ -708,7 +708,7 @@ shmem_pwrite(struct page *page, int offset, int len, char __user *user_data, char *vaddr; int ret; - vaddr = kmap(page); + vaddr = kmap_thread(page); if (needs_clflush_before) drm_clflush_virt_range(vaddr + offset, len); @@ -717,7 +717,7 @@ shmem_pwrite(struct page *page, int offset, int len, char __user *user_data, if (!ret && needs_clflush_after) drm_clflush_virt_range(vaddr + offset, len); - kunmap(page); + kunmap_thread(page); return ret ? -EFAULT : 0; } diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index 3e6cbb0d1150..aecd469b6b6e 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -1058,9 +1058,9 @@ i915_vma_coredump_create(const struct intel_gt *gt, drm_clflush_pages(&page, 1); - s = kmap(page); + s = kmap_thread(page); ret = compress_page(compress, s, dst, false); - kunmap(page); + kunmap_thread(page); drm_clflush_pages(&page, 1); diff --git a/drivers/gpu/drm/i915/selftests/i915_perf.c b/drivers/gpu/drm/i915/selftests/i915_perf.c index c2d001d9c0ec..7f7ef2d056f4 100644 --- a/drivers/gpu/drm/i915/selftests/i915_perf.c +++ b/drivers/gpu/drm/i915/selftests/i915_perf.c @@ -307,7 +307,7 @@ static int live_noa_gpr(void *arg) } /* Poison the ce->vm so we detect writes not to the GGTT gt->scratch */ - scratch = kmap(ce->vm->scratch[0].base.page); + scratch = kmap_thread(ce->vm->scratch[0].base.page); memset(scratch, POISON_FREE, PAGE_SIZE); rq = intel_context_create_request(ce); @@ -405,7 +405,7 @@ static int live_noa_gpr(void *arg) out_rq: i915_request_put(rq); out_ce: - kunmap(ce->vm->scratch[0].base.page); + kunmap_thread(ce->vm->scratch[0].base.page); intel_context_put(ce); out: stream_destroy(stream); diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index 004344dce140..0aba0cac51e1 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -1013,11 +1013,11 @@ static ssize_t radeon_ttm_gtt_read(struct file *f, char __user *buf, page = rdev->gart.pages[p]; if (page) { - ptr = kmap(page); + ptr = kmap_thread(page); ptr += off; r = copy_to_user(buf, ptr, cur_size); - kunmap(rdev->gart.pages[p]); + kunmap_thread(rdev->gart.pages[p]); } else r = clear_user(buf, cur_size); From patchwork Fri Oct 9 19:49:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285914 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E3012C433E7 for ; Fri, 9 Oct 2020 20:08:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 89D1A2067D for ; Fri, 9 Oct 2020 20:08:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391690AbgJIUHk (ORCPT ); Fri, 9 Oct 2020 16:07:40 -0400 Received: from mga12.intel.com ([192.55.52.136]:29143 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403958AbgJITve (ORCPT ); Fri, 9 Oct 2020 15:51:34 -0400 IronPort-SDR: uaD/tDmFHK22veBGR3YzL5VTBhxNLwUX5oCzX0P1SaQEJowj8ybTYyBX2T5ywdU6U+5NcEf+EP CKZez4YOWWdA== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="144850690" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="144850690" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:33 -0700 IronPort-SDR: HIW7PNpXrID3gOC4BJBiMK8gMhcX7pYwx4FKSDabG5rp79Jg8ur1teAkpcUK61qJFFQS9ID+ws 9ehpgS1/cOeQ== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="349957192" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:33 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Chris Mason , Josef Bacik , David Sterba , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 13/58] fs/btrfs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:49:48 -0700 Message-Id: <20201009195033.3208459-14-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Chris Mason Cc: Josef Bacik Cc: David Sterba Signed-off-by: Ira Weiny --- fs/btrfs/check-integrity.c | 4 ++-- fs/btrfs/compression.c | 4 ++-- fs/btrfs/inode.c | 16 ++++++++-------- fs/btrfs/lzo.c | 24 ++++++++++++------------ fs/btrfs/raid56.c | 34 +++++++++++++++++----------------- fs/btrfs/reflink.c | 8 ++++---- fs/btrfs/send.c | 4 ++-- fs/btrfs/zlib.c | 32 ++++++++++++++++---------------- fs/btrfs/zstd.c | 20 ++++++++++---------- 9 files changed, 73 insertions(+), 73 deletions(-) diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c index 81a8c87a5afb..9e5a02512ab5 100644 --- a/fs/btrfs/check-integrity.c +++ b/fs/btrfs/check-integrity.c @@ -2706,7 +2706,7 @@ static void __btrfsic_submit_bio(struct bio *bio) bio_for_each_segment(bvec, bio, iter) { BUG_ON(bvec.bv_len != PAGE_SIZE); - mapped_datav[i] = kmap(bvec.bv_page); + mapped_datav[i] = kmap_thread(bvec.bv_page); i++; if (dev_state->state->print_mask & @@ -2720,7 +2720,7 @@ static void __btrfsic_submit_bio(struct bio *bio) bio, &bio_is_patched, bio->bi_opf); bio_for_each_segment(bvec, bio, iter) - kunmap(bvec.bv_page); + kunmap_thread(bvec.bv_page); kfree(mapped_datav); } else if (NULL != dev_state && (bio->bi_opf & REQ_PREFLUSH)) { if (dev_state->state->print_mask & diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index 1ab56a734e70..5944fb36d68a 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -1626,7 +1626,7 @@ static void heuristic_collect_sample(struct inode *inode, u64 start, u64 end, curr_sample_pos = 0; while (index < index_end) { page = find_get_page(inode->i_mapping, index); - in_data = kmap(page); + in_data = kmap_thread(page); /* Handle case where the start is not aligned to PAGE_SIZE */ i = start % PAGE_SIZE; while (i < PAGE_SIZE - SAMPLING_READ_SIZE) { @@ -1639,7 +1639,7 @@ static void heuristic_collect_sample(struct inode *inode, u64 start, u64 end, start += SAMPLING_INTERVAL; curr_sample_pos += SAMPLING_READ_SIZE; } - kunmap(page); + kunmap_thread(page); put_page(page); index++; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 9570458aa847..9710a52c6c42 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4603,7 +4603,7 @@ int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, if (offset != blocksize) { if (!len) len = blocksize - offset; - kaddr = kmap(page); + kaddr = kmap_thread(page); if (front) memset(kaddr + (block_start - page_offset(page)), 0, offset); @@ -4611,7 +4611,7 @@ int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, memset(kaddr + (block_start - page_offset(page)) + offset, 0, len); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); } ClearPageChecked(page); set_page_dirty(page); @@ -6509,9 +6509,9 @@ static noinline int uncompress_inline(struct btrfs_path *path, */ if (max_size + pg_offset < PAGE_SIZE) { - char *map = kmap(page); + char *map = kmap_thread(page); memset(map + pg_offset + max_size, 0, PAGE_SIZE - max_size - pg_offset); - kunmap(page); + kunmap_thread(page); } kfree(tmp); return ret; @@ -6704,7 +6704,7 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, goto out; } } else { - map = kmap(page); + map = kmap_thread(page); read_extent_buffer(leaf, map + pg_offset, ptr, copy_size); if (pg_offset + copy_size < PAGE_SIZE) { @@ -6712,7 +6712,7 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, PAGE_SIZE - pg_offset - copy_size); } - kunmap(page); + kunmap_thread(page); } flush_dcache_page(page); } @@ -8326,10 +8326,10 @@ vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf) zero_start = PAGE_SIZE; if (zero_start != PAGE_SIZE) { - kaddr = kmap(page); + kaddr = kmap_thread(page); memset(kaddr + zero_start, 0, PAGE_SIZE - zero_start); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); } ClearPageChecked(page); set_page_dirty(page); diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c index aa9cd11f4b78..f29dcc9ec573 100644 --- a/fs/btrfs/lzo.c +++ b/fs/btrfs/lzo.c @@ -140,7 +140,7 @@ int lzo_compress_pages(struct list_head *ws, struct address_space *mapping, *total_in = 0; in_page = find_get_page(mapping, start >> PAGE_SHIFT); - data_in = kmap(in_page); + data_in = kmap_thread(in_page); /* * store the size of all chunks of compressed data in @@ -151,7 +151,7 @@ int lzo_compress_pages(struct list_head *ws, struct address_space *mapping, ret = -ENOMEM; goto out; } - cpage_out = kmap(out_page); + cpage_out = kmap_thread(out_page); out_offset = LZO_LEN; tot_out = LZO_LEN; pages[0] = out_page; @@ -209,7 +209,7 @@ int lzo_compress_pages(struct list_head *ws, struct address_space *mapping, if (out_len == 0 && tot_in >= len) break; - kunmap(out_page); + kunmap_thread(out_page); if (nr_pages == nr_dest_pages) { out_page = NULL; ret = -E2BIG; @@ -221,7 +221,7 @@ int lzo_compress_pages(struct list_head *ws, struct address_space *mapping, ret = -ENOMEM; goto out; } - cpage_out = kmap(out_page); + cpage_out = kmap_thread(out_page); pages[nr_pages++] = out_page; pg_bytes_left = PAGE_SIZE; @@ -243,12 +243,12 @@ int lzo_compress_pages(struct list_head *ws, struct address_space *mapping, break; bytes_left = len - tot_in; - kunmap(in_page); + kunmap_thread(in_page); put_page(in_page); start += PAGE_SIZE; in_page = find_get_page(mapping, start >> PAGE_SHIFT); - data_in = kmap(in_page); + data_in = kmap_thread(in_page); in_len = min(bytes_left, PAGE_SIZE); } @@ -258,10 +258,10 @@ int lzo_compress_pages(struct list_head *ws, struct address_space *mapping, } /* store the size of all chunks of compressed data */ - cpage_out = kmap(pages[0]); + cpage_out = kmap_thread(pages[0]); write_compress_length(cpage_out, tot_out); - kunmap(pages[0]); + kunmap_thread(pages[0]); ret = 0; *total_out = tot_out; @@ -269,10 +269,10 @@ int lzo_compress_pages(struct list_head *ws, struct address_space *mapping, out: *out_pages = nr_pages; if (out_page) - kunmap(out_page); + kunmap_thread(out_page); if (in_page) { - kunmap(in_page); + kunmap_thread(in_page); put_page(in_page); } @@ -305,7 +305,7 @@ int lzo_decompress_bio(struct list_head *ws, struct compressed_bio *cb) u64 disk_start = cb->start; struct bio *orig_bio = cb->orig_bio; - data_in = kmap(pages_in[0]); + data_in = kmap_thread(pages_in[0]); tot_len = read_compress_length(data_in); /* * Compressed data header check. @@ -387,7 +387,7 @@ int lzo_decompress_bio(struct list_head *ws, struct compressed_bio *cb) else kunmap(pages_in[page_in_index]); - data_in = kmap(pages_in[++page_in_index]); + data_in = kmap_thread(pages_in[++page_in_index]); in_page_bytes_left = PAGE_SIZE; in_offset = 0; diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c index 255490f42b5d..34e646e4548c 100644 --- a/fs/btrfs/raid56.c +++ b/fs/btrfs/raid56.c @@ -262,13 +262,13 @@ static void cache_rbio_pages(struct btrfs_raid_bio *rbio) if (!rbio->bio_pages[i]) continue; - s = kmap(rbio->bio_pages[i]); - d = kmap(rbio->stripe_pages[i]); + s = kmap_thread(rbio->bio_pages[i]); + d = kmap_thread(rbio->stripe_pages[i]); copy_page(d, s); - kunmap(rbio->bio_pages[i]); - kunmap(rbio->stripe_pages[i]); + kunmap_thread(rbio->bio_pages[i]); + kunmap_thread(rbio->stripe_pages[i]); SetPageUptodate(rbio->stripe_pages[i]); } set_bit(RBIO_CACHE_READY_BIT, &rbio->flags); @@ -1241,13 +1241,13 @@ static noinline void finish_rmw(struct btrfs_raid_bio *rbio) /* first collect one page from each data stripe */ for (stripe = 0; stripe < nr_data; stripe++) { p = page_in_rbio(rbio, stripe, pagenr, 0); - pointers[stripe] = kmap(p); + pointers[stripe] = kmap_thread(p); } /* then add the parity stripe */ p = rbio_pstripe_page(rbio, pagenr); SetPageUptodate(p); - pointers[stripe++] = kmap(p); + pointers[stripe++] = kmap_thread(p); if (has_qstripe) { @@ -1257,7 +1257,7 @@ static noinline void finish_rmw(struct btrfs_raid_bio *rbio) */ p = rbio_qstripe_page(rbio, pagenr); SetPageUptodate(p); - pointers[stripe++] = kmap(p); + pointers[stripe++] = kmap_thread(p); raid6_call.gen_syndrome(rbio->real_stripes, PAGE_SIZE, pointers); @@ -1269,7 +1269,7 @@ static noinline void finish_rmw(struct btrfs_raid_bio *rbio) for (stripe = 0; stripe < rbio->real_stripes; stripe++) - kunmap(page_in_rbio(rbio, stripe, pagenr, 0)); + kunmap_thread(page_in_rbio(rbio, stripe, pagenr, 0)); } /* @@ -1835,7 +1835,7 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio) } else { page = rbio_stripe_page(rbio, stripe, pagenr); } - pointers[stripe] = kmap(page); + pointers[stripe] = kmap_thread(page); } /* all raid6 handling here */ @@ -1940,7 +1940,7 @@ static void __raid_recover_end_io(struct btrfs_raid_bio *rbio) } else { page = rbio_stripe_page(rbio, stripe, pagenr); } - kunmap(page); + kunmap_thread(page); } } @@ -2379,18 +2379,18 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio, /* first collect one page from each data stripe */ for (stripe = 0; stripe < nr_data; stripe++) { p = page_in_rbio(rbio, stripe, pagenr, 0); - pointers[stripe] = kmap(p); + pointers[stripe] = kmap_thread(p); } /* then add the parity stripe */ - pointers[stripe++] = kmap(p_page); + pointers[stripe++] = kmap_thread(p_page); if (has_qstripe) { /* * raid6, add the qstripe and call the * library function to fill in our p/q */ - pointers[stripe++] = kmap(q_page); + pointers[stripe++] = kmap_thread(q_page); raid6_call.gen_syndrome(rbio->real_stripes, PAGE_SIZE, pointers); @@ -2402,17 +2402,17 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio, /* Check scrubbing parity and repair it */ p = rbio_stripe_page(rbio, rbio->scrubp, pagenr); - parity = kmap(p); + parity = kmap_thread(p); if (memcmp(parity, pointers[rbio->scrubp], PAGE_SIZE)) copy_page(parity, pointers[rbio->scrubp]); else /* Parity is right, needn't writeback */ bitmap_clear(rbio->dbitmap, pagenr, 1); - kunmap(p); + kunmap_thread(p); for (stripe = 0; stripe < nr_data; stripe++) - kunmap(page_in_rbio(rbio, stripe, pagenr, 0)); - kunmap(p_page); + kunmap_thread(page_in_rbio(rbio, stripe, pagenr, 0)); + kunmap_thread(p_page); } __free_page(p_page); diff --git a/fs/btrfs/reflink.c b/fs/btrfs/reflink.c index 5cd02514cf4d..10e53d7eba8c 100644 --- a/fs/btrfs/reflink.c +++ b/fs/btrfs/reflink.c @@ -92,10 +92,10 @@ static int copy_inline_to_page(struct inode *inode, if (comp_type == BTRFS_COMPRESS_NONE) { char *map; - map = kmap(page); + map = kmap_thread(page); memcpy(map, data_start, datal); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); } else { ret = btrfs_decompress(comp_type, data_start, page, 0, inline_size, datal); @@ -119,10 +119,10 @@ static int copy_inline_to_page(struct inode *inode, if (datal < block_size) { char *map; - map = kmap(page); + map = kmap_thread(page); memset(map + datal, 0, block_size - datal); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); } SetPageUptodate(page); diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index d9813a5b075a..06c383d3dc43 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -4863,9 +4863,9 @@ static ssize_t fill_read_buf(struct send_ctx *sctx, u64 offset, u32 len) } } - addr = kmap(page); + addr = kmap_thread(page); memcpy(sctx->read_buf + ret, addr + pg_offset, cur_len); - kunmap(page); + kunmap_thread(page); unlock_page(page); put_page(page); index++; diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c index 05615a1099db..45b7a907bab3 100644 --- a/fs/btrfs/zlib.c +++ b/fs/btrfs/zlib.c @@ -126,7 +126,7 @@ int zlib_compress_pages(struct list_head *ws, struct address_space *mapping, ret = -ENOMEM; goto out; } - cpage_out = kmap(out_page); + cpage_out = kmap_thread(out_page); pages[0] = out_page; nr_pages = 1; @@ -149,12 +149,12 @@ int zlib_compress_pages(struct list_head *ws, struct address_space *mapping, for (i = 0; i < in_buf_pages; i++) { if (in_page) { - kunmap(in_page); + kunmap_thread(in_page); put_page(in_page); } in_page = find_get_page(mapping, start >> PAGE_SHIFT); - data_in = kmap(in_page); + data_in = kmap_thread(in_page); memcpy(workspace->buf + i * PAGE_SIZE, data_in, PAGE_SIZE); start += PAGE_SIZE; @@ -162,12 +162,12 @@ int zlib_compress_pages(struct list_head *ws, struct address_space *mapping, workspace->strm.next_in = workspace->buf; } else { if (in_page) { - kunmap(in_page); + kunmap_thread(in_page); put_page(in_page); } in_page = find_get_page(mapping, start >> PAGE_SHIFT); - data_in = kmap(in_page); + data_in = kmap_thread(in_page); start += PAGE_SIZE; workspace->strm.next_in = data_in; } @@ -196,7 +196,7 @@ int zlib_compress_pages(struct list_head *ws, struct address_space *mapping, * the stream end if required */ if (workspace->strm.avail_out == 0) { - kunmap(out_page); + kunmap_thread(out_page); if (nr_pages == nr_dest_pages) { out_page = NULL; ret = -E2BIG; @@ -207,7 +207,7 @@ int zlib_compress_pages(struct list_head *ws, struct address_space *mapping, ret = -ENOMEM; goto out; } - cpage_out = kmap(out_page); + cpage_out = kmap_thread(out_page); pages[nr_pages] = out_page; nr_pages++; workspace->strm.avail_out = PAGE_SIZE; @@ -234,7 +234,7 @@ int zlib_compress_pages(struct list_head *ws, struct address_space *mapping, goto out; } else if (workspace->strm.avail_out == 0) { /* get another page for the stream end */ - kunmap(out_page); + kunmap_thread(out_page); if (nr_pages == nr_dest_pages) { out_page = NULL; ret = -E2BIG; @@ -245,7 +245,7 @@ int zlib_compress_pages(struct list_head *ws, struct address_space *mapping, ret = -ENOMEM; goto out; } - cpage_out = kmap(out_page); + cpage_out = kmap_thread(out_page); pages[nr_pages] = out_page; nr_pages++; workspace->strm.avail_out = PAGE_SIZE; @@ -265,10 +265,10 @@ int zlib_compress_pages(struct list_head *ws, struct address_space *mapping, out: *out_pages = nr_pages; if (out_page) - kunmap(out_page); + kunmap_thread(out_page); if (in_page) { - kunmap(in_page); + kunmap_thread(in_page); put_page(in_page); } return ret; @@ -289,7 +289,7 @@ int zlib_decompress_bio(struct list_head *ws, struct compressed_bio *cb) u64 disk_start = cb->start; struct bio *orig_bio = cb->orig_bio; - data_in = kmap(pages_in[page_in_index]); + data_in = kmap_thread(pages_in[page_in_index]); workspace->strm.next_in = data_in; workspace->strm.avail_in = min_t(size_t, srclen, PAGE_SIZE); workspace->strm.total_in = 0; @@ -311,7 +311,7 @@ int zlib_decompress_bio(struct list_head *ws, struct compressed_bio *cb) if (Z_OK != zlib_inflateInit2(&workspace->strm, wbits)) { pr_warn("BTRFS: inflateInit failed\n"); - kunmap(pages_in[page_in_index]); + kunmap_thread(pages_in[page_in_index]); return -EIO; } while (workspace->strm.total_in < srclen) { @@ -339,13 +339,13 @@ int zlib_decompress_bio(struct list_head *ws, struct compressed_bio *cb) if (workspace->strm.avail_in == 0) { unsigned long tmp; - kunmap(pages_in[page_in_index]); + kunmap_thread(pages_in[page_in_index]); page_in_index++; if (page_in_index >= total_pages_in) { data_in = NULL; break; } - data_in = kmap(pages_in[page_in_index]); + data_in = kmap_thread(pages_in[page_in_index]); workspace->strm.next_in = data_in; tmp = srclen - workspace->strm.total_in; workspace->strm.avail_in = min(tmp, @@ -359,7 +359,7 @@ int zlib_decompress_bio(struct list_head *ws, struct compressed_bio *cb) done: zlib_inflateEnd(&workspace->strm); if (data_in) - kunmap(pages_in[page_in_index]); + kunmap_thread(pages_in[page_in_index]); if (!ret) zero_fill_bio(orig_bio); return ret; diff --git a/fs/btrfs/zstd.c b/fs/btrfs/zstd.c index 9a4871636c6c..48e03f6dcef7 100644 --- a/fs/btrfs/zstd.c +++ b/fs/btrfs/zstd.c @@ -399,7 +399,7 @@ int zstd_compress_pages(struct list_head *ws, struct address_space *mapping, /* map in the first page of input data */ in_page = find_get_page(mapping, start >> PAGE_SHIFT); - workspace->in_buf.src = kmap(in_page); + workspace->in_buf.src = kmap_thread(in_page); workspace->in_buf.pos = 0; workspace->in_buf.size = min_t(size_t, len, PAGE_SIZE); @@ -411,7 +411,7 @@ int zstd_compress_pages(struct list_head *ws, struct address_space *mapping, goto out; } pages[nr_pages++] = out_page; - workspace->out_buf.dst = kmap(out_page); + workspace->out_buf.dst = kmap_thread(out_page); workspace->out_buf.pos = 0; workspace->out_buf.size = min_t(size_t, max_out, PAGE_SIZE); @@ -446,7 +446,7 @@ int zstd_compress_pages(struct list_head *ws, struct address_space *mapping, if (workspace->out_buf.pos == workspace->out_buf.size) { tot_out += PAGE_SIZE; max_out -= PAGE_SIZE; - kunmap(out_page); + kunmap_thread(out_page); if (nr_pages == nr_dest_pages) { out_page = NULL; ret = -E2BIG; @@ -458,7 +458,7 @@ int zstd_compress_pages(struct list_head *ws, struct address_space *mapping, goto out; } pages[nr_pages++] = out_page; - workspace->out_buf.dst = kmap(out_page); + workspace->out_buf.dst = kmap_thread(out_page); workspace->out_buf.pos = 0; workspace->out_buf.size = min_t(size_t, max_out, PAGE_SIZE); @@ -479,7 +479,7 @@ int zstd_compress_pages(struct list_head *ws, struct address_space *mapping, start += PAGE_SIZE; len -= PAGE_SIZE; in_page = find_get_page(mapping, start >> PAGE_SHIFT); - workspace->in_buf.src = kmap(in_page); + workspace->in_buf.src = kmap_thread(in_page); workspace->in_buf.pos = 0; workspace->in_buf.size = min_t(size_t, len, PAGE_SIZE); } @@ -518,7 +518,7 @@ int zstd_compress_pages(struct list_head *ws, struct address_space *mapping, goto out; } pages[nr_pages++] = out_page; - workspace->out_buf.dst = kmap(out_page); + workspace->out_buf.dst = kmap_thread(out_page); workspace->out_buf.pos = 0; workspace->out_buf.size = min_t(size_t, max_out, PAGE_SIZE); } @@ -565,7 +565,7 @@ int zstd_decompress_bio(struct list_head *ws, struct compressed_bio *cb) goto done; } - workspace->in_buf.src = kmap(pages_in[page_in_index]); + workspace->in_buf.src = kmap_thread(pages_in[page_in_index]); workspace->in_buf.pos = 0; workspace->in_buf.size = min_t(size_t, srclen, PAGE_SIZE); @@ -601,14 +601,14 @@ int zstd_decompress_bio(struct list_head *ws, struct compressed_bio *cb) break; if (workspace->in_buf.pos == workspace->in_buf.size) { - kunmap(pages_in[page_in_index++]); + kunmap_thread(pages_in[page_in_index++]); if (page_in_index >= total_pages_in) { workspace->in_buf.src = NULL; ret = -EIO; goto done; } srclen -= PAGE_SIZE; - workspace->in_buf.src = kmap(pages_in[page_in_index]); + workspace->in_buf.src = kmap_thread(pages_in[page_in_index]); workspace->in_buf.pos = 0; workspace->in_buf.size = min_t(size_t, srclen, PAGE_SIZE); } @@ -617,7 +617,7 @@ int zstd_decompress_bio(struct list_head *ws, struct compressed_bio *cb) zero_fill_bio(orig_bio); done: if (workspace->in_buf.src) - kunmap(pages_in[page_in_index]); + kunmap_thread(pages_in[page_in_index]); return ret; } From patchwork Fri Oct 9 19:49:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285936 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81998C3815A for ; Fri, 9 Oct 2020 19:52:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 495EA22450 for ; Fri, 9 Oct 2020 19:52:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390953AbgJITwf (ORCPT ); Fri, 9 Oct 2020 15:52:35 -0400 Received: from mga09.intel.com ([134.134.136.24]:28500 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403960AbgJITvo (ORCPT ); Fri, 9 Oct 2020 15:51:44 -0400 IronPort-SDR: a5UykbwCgTP384gKma5qFI3sXyLFx+H0TkE3bWli7m5L4VMAGrmVc2GmxhsL47uu4QEtm0I3+G jjzBYwClEtzg== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="165642946" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="165642946" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:42 -0700 IronPort-SDR: /JTFkd5x0991ia3Dqzqc9DQMEj3VkzRKrzcEaYc1Uf7R2BILbYJ/fow/WUSSa3njc7c47Zr56l AjDrFCZ0Z24A== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="389236880" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:41 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Herbert Xu , Eric Biggers , Aditya Pakki , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 15/58] fs/ecryptfs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:49:50 -0700 Message-Id: <20201009195033.3208459-16-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Herbert Xu Cc: Eric Biggers Cc: Aditya Pakki Signed-off-by: Ira Weiny --- fs/ecryptfs/crypto.c | 8 ++++---- fs/ecryptfs/read_write.c | 8 ++++---- 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 0681540c48d9..e73e00994bee 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -469,10 +469,10 @@ int ecryptfs_encrypt_page(struct page *page) } lower_offset = lower_offset_for_page(crypt_stat, page); - enc_extent_virt = kmap(enc_extent_page); + enc_extent_virt = kmap_thread(enc_extent_page); rc = ecryptfs_write_lower(ecryptfs_inode, enc_extent_virt, lower_offset, PAGE_SIZE); - kunmap(enc_extent_page); + kunmap_thread(enc_extent_page); if (rc < 0) { ecryptfs_printk(KERN_ERR, "Error attempting to write lower page; rc = [%d]\n", @@ -518,10 +518,10 @@ int ecryptfs_decrypt_page(struct page *page) BUG_ON(!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)); lower_offset = lower_offset_for_page(crypt_stat, page); - page_virt = kmap(page); + page_virt = kmap_thread(page); rc = ecryptfs_read_lower(page_virt, lower_offset, PAGE_SIZE, ecryptfs_inode); - kunmap(page); + kunmap_thread(page); if (rc < 0) { ecryptfs_printk(KERN_ERR, "Error attempting to read lower page; rc = [%d]\n", diff --git a/fs/ecryptfs/read_write.c b/fs/ecryptfs/read_write.c index 0438997ac9d8..5eca4330c0c0 100644 --- a/fs/ecryptfs/read_write.c +++ b/fs/ecryptfs/read_write.c @@ -64,11 +64,11 @@ int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode, offset = ((((loff_t)page_for_lower->index) << PAGE_SHIFT) + offset_in_page); - virt = kmap(page_for_lower); + virt = kmap_thread(page_for_lower); rc = ecryptfs_write_lower(ecryptfs_inode, virt, offset, size); if (rc > 0) rc = 0; - kunmap(page_for_lower); + kunmap_thread(page_for_lower); return rc; } @@ -251,11 +251,11 @@ int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs, int rc; offset = ((((loff_t)page_index) << PAGE_SHIFT) + offset_in_page); - virt = kmap(page_for_ecryptfs); + virt = kmap_thread(page_for_ecryptfs); rc = ecryptfs_read_lower(virt, offset, size, ecryptfs_inode); if (rc > 0) rc = 0; - kunmap(page_for_ecryptfs); + kunmap_thread(page_for_ecryptfs); flush_dcache_page(page_for_ecryptfs); return rc; } From patchwork Fri Oct 9 19:49:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285935 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 719A7C8300F for ; Fri, 9 Oct 2020 19:53:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 50C072245B for ; Fri, 9 Oct 2020 19:53:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391017AbgJITw4 (ORCPT ); Fri, 9 Oct 2020 15:52:56 -0400 Received: from mga01.intel.com ([192.55.52.88]:3587 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390882AbgJITvx (ORCPT ); Fri, 9 Oct 2020 15:51:53 -0400 IronPort-SDR: mzoU95oSP1VwD5uWDae0guS0a6cE+H7YgLc5+R2J4zXJztdZotOqq9cM2YFYDL1izjhOdl5LMS EbOn31fl/5qQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="182976174" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="182976174" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:51 -0700 IronPort-SDR: OASmflq+Rx+yTtbdwfMJ0o3fYX/22afbp7t4aASuh19KdC4DJdh+fKQIdVVFr7y3ZwUlZzPFTz pRsXSfU26jow== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="529053257" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:50 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 18/58] fs/hfs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:49:53 -0700 Message-Id: <20201009195033.3208459-19-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Signed-off-by: Ira Weiny --- fs/hfs/bnode.c | 14 +++++++------- fs/hfs/btree.c | 20 ++++++++++---------- 2 files changed, 17 insertions(+), 17 deletions(-) diff --git a/fs/hfs/bnode.c b/fs/hfs/bnode.c index b63a4df7327b..8b4d02576405 100644 --- a/fs/hfs/bnode.c +++ b/fs/hfs/bnode.c @@ -23,8 +23,8 @@ void hfs_bnode_read(struct hfs_bnode *node, void *buf, off += node->page_offset; page = node->page[0]; - memcpy(buf, kmap(page) + off, len); - kunmap(page); + memcpy(buf, kmap_thread(page) + off, len); + kunmap_thread(page); } u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off) @@ -108,9 +108,9 @@ void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst, src_page = src_node->page[0]; dst_page = dst_node->page[0]; - memcpy(kmap(dst_page) + dst, kmap(src_page) + src, len); - kunmap(src_page); - kunmap(dst_page); + memcpy(kmap_thread(dst_page) + dst, kmap_thread(src_page) + src, len); + kunmap_thread(src_page); + kunmap_thread(dst_page); set_page_dirty(dst_page); } @@ -125,9 +125,9 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len) src += node->page_offset; dst += node->page_offset; page = node->page[0]; - ptr = kmap(page); + ptr = kmap_thread(page); memmove(ptr + dst, ptr + src, len); - kunmap(page); + kunmap_thread(page); set_page_dirty(page); } diff --git a/fs/hfs/btree.c b/fs/hfs/btree.c index 19017d296173..bd4a6d35e361 100644 --- a/fs/hfs/btree.c +++ b/fs/hfs/btree.c @@ -80,7 +80,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke goto free_inode; /* Load the header */ - head = (struct hfs_btree_header_rec *)(kmap(page) + sizeof(struct hfs_bnode_desc)); + head = (struct hfs_btree_header_rec *)(kmap_thread(page) + sizeof(struct hfs_bnode_desc)); tree->root = be32_to_cpu(head->root); tree->leaf_count = be32_to_cpu(head->leaf_count); tree->leaf_head = be32_to_cpu(head->leaf_head); @@ -119,7 +119,7 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id, btree_keycmp ke tree->node_size_shift = ffs(size) - 1; tree->pages_per_bnode = (tree->node_size + PAGE_SIZE - 1) >> PAGE_SHIFT; - kunmap(page); + kunmap_thread(page); put_page(page); return tree; @@ -268,7 +268,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) off += node->page_offset; pagep = node->page + (off >> PAGE_SHIFT); - data = kmap(*pagep); + data = kmap_thread(*pagep); off &= ~PAGE_MASK; idx = 0; @@ -281,7 +281,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) idx += i; data[off] |= m; set_page_dirty(*pagep); - kunmap(*pagep); + kunmap_thread(*pagep); tree->free_nodes--; mark_inode_dirty(tree->inode); hfs_bnode_put(node); @@ -290,14 +290,14 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) } } if (++off >= PAGE_SIZE) { - kunmap(*pagep); - data = kmap(*++pagep); + kunmap_thread(*pagep); + data = kmap_thread(*++pagep); off = 0; } idx += 8; len--; } - kunmap(*pagep); + kunmap_thread(*pagep); nidx = node->next; if (!nidx) { printk(KERN_DEBUG "create new bmap node...\n"); @@ -313,7 +313,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) off = off16; off += node->page_offset; pagep = node->page + (off >> PAGE_SHIFT); - data = kmap(*pagep); + data = kmap_thread(*pagep); off &= ~PAGE_MASK; } } @@ -360,7 +360,7 @@ void hfs_bmap_free(struct hfs_bnode *node) } off += node->page_offset + nidx / 8; page = node->page[off >> PAGE_SHIFT]; - data = kmap(page); + data = kmap_thread(page); off &= ~PAGE_MASK; m = 1 << (~nidx & 7); byte = data[off]; @@ -373,7 +373,7 @@ void hfs_bmap_free(struct hfs_bnode *node) } data[off] = byte & ~m; set_page_dirty(page); - kunmap(page); + kunmap_thread(page); hfs_bnode_put(node); tree->free_nodes++; mark_inode_dirty(tree->inode); From patchwork Fri Oct 9 19:49:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285915 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 93A7CC4363D for ; Fri, 9 Oct 2020 20:07:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4F1CC22284 for ; Fri, 9 Oct 2020 20:07:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391619AbgJIUG4 (ORCPT ); Fri, 9 Oct 2020 16:06:56 -0400 Received: from mga01.intel.com ([192.55.52.88]:3593 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389151AbgJITv5 (ORCPT ); Fri, 9 Oct 2020 15:51:57 -0400 IronPort-SDR: LXMDrio76eD4QJ0LjRz4EmmRBmjTijr/fa5SezwV0QRnonKitI0rO4pKp7fXuLJKLgkOJhzNOa sK9IuxnkWw1Q== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="182976189" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="182976189" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:55 -0700 IronPort-SDR: vmw0BK7OYY8h0fZsnTgtJRpvmXsWJvpJiZ/O3ONyZujh0oi54UYOLunW4B1xesRkeTs3uxMx1d pOHAzA+ZEWzg== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="529053305" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:51:54 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 19/58] fs/hfsplus: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:49:54 -0700 Message-Id: <20201009195033.3208459-20-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Signed-off-by: Ira Weiny --- fs/hfsplus/bitmap.c | 20 ++++----- fs/hfsplus/bnode.c | 102 ++++++++++++++++++++++---------------------- fs/hfsplus/btree.c | 18 ++++---- 3 files changed, 70 insertions(+), 70 deletions(-) diff --git a/fs/hfsplus/bitmap.c b/fs/hfsplus/bitmap.c index cebce0cfe340..9ec7c1559a0c 100644 --- a/fs/hfsplus/bitmap.c +++ b/fs/hfsplus/bitmap.c @@ -39,7 +39,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size, start = size; goto out; } - pptr = kmap(page); + pptr = kmap_thread(page); curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32; i = offset % 32; offset &= ~(PAGE_CACHE_BITS - 1); @@ -74,7 +74,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size, } curr++; } - kunmap(page); + kunmap_thread(page); offset += PAGE_CACHE_BITS; if (offset >= size) break; @@ -84,7 +84,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size, start = size; goto out; } - curr = pptr = kmap(page); + curr = pptr = kmap_thread(page); if ((size ^ offset) / PAGE_CACHE_BITS) end = pptr + PAGE_CACHE_BITS / 32; else @@ -127,7 +127,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size, len -= 32; } set_page_dirty(page); - kunmap(page); + kunmap_thread(page); offset += PAGE_CACHE_BITS; page = read_mapping_page(mapping, offset / PAGE_CACHE_BITS, NULL); @@ -135,7 +135,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size, start = size; goto out; } - pptr = kmap(page); + pptr = kmap_thread(page); curr = pptr; end = pptr + PAGE_CACHE_BITS / 32; } @@ -151,7 +151,7 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size, done: *curr = cpu_to_be32(n); set_page_dirty(page); - kunmap(page); + kunmap_thread(page); *max = offset + (curr - pptr) * 32 + i - start; sbi->free_blocks -= *max; hfsplus_mark_mdb_dirty(sb); @@ -185,7 +185,7 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count) page = read_mapping_page(mapping, pnr, NULL); if (IS_ERR(page)) goto kaboom; - pptr = kmap(page); + pptr = kmap_thread(page); curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32; end = pptr + PAGE_CACHE_BITS / 32; len = count; @@ -215,11 +215,11 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count) if (!count) break; set_page_dirty(page); - kunmap(page); + kunmap_thread(page); page = read_mapping_page(mapping, ++pnr, NULL); if (IS_ERR(page)) goto kaboom; - pptr = kmap(page); + pptr = kmap_thread(page); curr = pptr; end = pptr + PAGE_CACHE_BITS / 32; } @@ -231,7 +231,7 @@ int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count) } out: set_page_dirty(page); - kunmap(page); + kunmap_thread(page); sbi->free_blocks += len; hfsplus_mark_mdb_dirty(sb); mutex_unlock(&sbi->alloc_mutex); diff --git a/fs/hfsplus/bnode.c b/fs/hfsplus/bnode.c index 177fae4e6581..62757d92fbbd 100644 --- a/fs/hfsplus/bnode.c +++ b/fs/hfsplus/bnode.c @@ -29,14 +29,14 @@ void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len) off &= ~PAGE_MASK; l = min_t(int, len, PAGE_SIZE - off); - memcpy(buf, kmap(*pagep) + off, l); - kunmap(*pagep); + memcpy(buf, kmap_thread(*pagep) + off, l); + kunmap_thread(*pagep); while ((len -= l) != 0) { buf += l; l = min_t(int, len, PAGE_SIZE); - memcpy(buf, kmap(*++pagep), l); - kunmap(*pagep); + memcpy(buf, kmap_thread(*++pagep), l); + kunmap_thread(*pagep); } } @@ -82,16 +82,16 @@ void hfs_bnode_write(struct hfs_bnode *node, void *buf, int off, int len) off &= ~PAGE_MASK; l = min_t(int, len, PAGE_SIZE - off); - memcpy(kmap(*pagep) + off, buf, l); + memcpy(kmap_thread(*pagep) + off, buf, l); set_page_dirty(*pagep); - kunmap(*pagep); + kunmap_thread(*pagep); while ((len -= l) != 0) { buf += l; l = min_t(int, len, PAGE_SIZE); - memcpy(kmap(*++pagep), buf, l); + memcpy(kmap_thread(*++pagep), buf, l); set_page_dirty(*pagep); - kunmap(*pagep); + kunmap_thread(*pagep); } } @@ -112,15 +112,15 @@ void hfs_bnode_clear(struct hfs_bnode *node, int off, int len) off &= ~PAGE_MASK; l = min_t(int, len, PAGE_SIZE - off); - memset(kmap(*pagep) + off, 0, l); + memset(kmap_thread(*pagep) + off, 0, l); set_page_dirty(*pagep); - kunmap(*pagep); + kunmap_thread(*pagep); while ((len -= l) != 0) { l = min_t(int, len, PAGE_SIZE); - memset(kmap(*++pagep), 0, l); + memset(kmap_thread(*++pagep), 0, l); set_page_dirty(*pagep); - kunmap(*pagep); + kunmap_thread(*pagep); } } @@ -142,24 +142,24 @@ void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst, if (src == dst) { l = min_t(int, len, PAGE_SIZE - src); - memcpy(kmap(*dst_page) + src, kmap(*src_page) + src, l); - kunmap(*src_page); + memcpy(kmap_thread(*dst_page) + src, kmap_thread(*src_page) + src, l); + kunmap_thread(*src_page); set_page_dirty(*dst_page); - kunmap(*dst_page); + kunmap_thread(*dst_page); while ((len -= l) != 0) { l = min_t(int, len, PAGE_SIZE); - memcpy(kmap(*++dst_page), kmap(*++src_page), l); - kunmap(*src_page); + memcpy(kmap_thread(*++dst_page), kmap_thread(*++src_page), l); + kunmap_thread(*src_page); set_page_dirty(*dst_page); - kunmap(*dst_page); + kunmap_thread(*dst_page); } } else { void *src_ptr, *dst_ptr; do { - src_ptr = kmap(*src_page) + src; - dst_ptr = kmap(*dst_page) + dst; + src_ptr = kmap_thread(*src_page) + src; + dst_ptr = kmap_thread(*dst_page) + dst; if (PAGE_SIZE - src < PAGE_SIZE - dst) { l = PAGE_SIZE - src; src = 0; @@ -171,9 +171,9 @@ void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst, } l = min(len, l); memcpy(dst_ptr, src_ptr, l); - kunmap(*src_page); + kunmap_thread(*src_page); set_page_dirty(*dst_page); - kunmap(*dst_page); + kunmap_thread(*dst_page); if (!dst) dst_page++; else @@ -202,27 +202,27 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len) if (src == dst) { while (src < len) { - memmove(kmap(*dst_page), kmap(*src_page), src); - kunmap(*src_page); + memmove(kmap_thread(*dst_page), kmap_thread(*src_page), src); + kunmap_thread(*src_page); set_page_dirty(*dst_page); - kunmap(*dst_page); + kunmap_thread(*dst_page); len -= src; src = PAGE_SIZE; src_page--; dst_page--; } src -= len; - memmove(kmap(*dst_page) + src, - kmap(*src_page) + src, len); - kunmap(*src_page); + memmove(kmap_thread(*dst_page) + src, + kmap_thread(*src_page) + src, len); + kunmap_thread(*src_page); set_page_dirty(*dst_page); - kunmap(*dst_page); + kunmap_thread(*dst_page); } else { void *src_ptr, *dst_ptr; do { - src_ptr = kmap(*src_page) + src; - dst_ptr = kmap(*dst_page) + dst; + src_ptr = kmap_thread(*src_page) + src; + dst_ptr = kmap_thread(*dst_page) + dst; if (src < dst) { l = src; src = PAGE_SIZE; @@ -234,9 +234,9 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len) } l = min(len, l); memmove(dst_ptr - l, src_ptr - l, l); - kunmap(*src_page); + kunmap_thread(*src_page); set_page_dirty(*dst_page); - kunmap(*dst_page); + kunmap_thread(*dst_page); if (dst == PAGE_SIZE) dst_page--; else @@ -251,26 +251,26 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len) if (src == dst) { l = min_t(int, len, PAGE_SIZE - src); - memmove(kmap(*dst_page) + src, - kmap(*src_page) + src, l); - kunmap(*src_page); + memmove(kmap_thread(*dst_page) + src, + kmap_thread(*src_page) + src, l); + kunmap_thread(*src_page); set_page_dirty(*dst_page); - kunmap(*dst_page); + kunmap_thread(*dst_page); while ((len -= l) != 0) { l = min_t(int, len, PAGE_SIZE); - memmove(kmap(*++dst_page), - kmap(*++src_page), l); - kunmap(*src_page); + memmove(kmap_thread(*++dst_page), + kmap_thread(*++src_page), l); + kunmap_thread(*src_page); set_page_dirty(*dst_page); - kunmap(*dst_page); + kunmap_thread(*dst_page); } } else { void *src_ptr, *dst_ptr; do { - src_ptr = kmap(*src_page) + src; - dst_ptr = kmap(*dst_page) + dst; + src_ptr = kmap_thread(*src_page) + src; + dst_ptr = kmap_thread(*dst_page) + dst; if (PAGE_SIZE - src < PAGE_SIZE - dst) { l = PAGE_SIZE - src; @@ -283,9 +283,9 @@ void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len) } l = min(len, l); memmove(dst_ptr, src_ptr, l); - kunmap(*src_page); + kunmap_thread(*src_page); set_page_dirty(*dst_page); - kunmap(*dst_page); + kunmap_thread(*dst_page); if (!dst) dst_page++; else @@ -502,14 +502,14 @@ struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num) if (!test_bit(HFS_BNODE_NEW, &node->flags)) return node; - desc = (struct hfs_bnode_desc *)(kmap(node->page[0]) + + desc = (struct hfs_bnode_desc *)(kmap_thread(node->page[0]) + node->page_offset); node->prev = be32_to_cpu(desc->prev); node->next = be32_to_cpu(desc->next); node->num_recs = be16_to_cpu(desc->num_recs); node->type = desc->type; node->height = desc->height; - kunmap(node->page[0]); + kunmap_thread(node->page[0]); switch (node->type) { case HFS_NODE_HEADER: @@ -593,14 +593,14 @@ struct hfs_bnode *hfs_bnode_create(struct hfs_btree *tree, u32 num) } pagep = node->page; - memset(kmap(*pagep) + node->page_offset, 0, + memset(kmap_thread(*pagep) + node->page_offset, 0, min_t(int, PAGE_SIZE, tree->node_size)); set_page_dirty(*pagep); - kunmap(*pagep); + kunmap_thread(*pagep); for (i = 1; i < tree->pages_per_bnode; i++) { - memset(kmap(*++pagep), 0, PAGE_SIZE); + memset(kmap_thread(*++pagep), 0, PAGE_SIZE); set_page_dirty(*pagep); - kunmap(*pagep); + kunmap_thread(*pagep); } clear_bit(HFS_BNODE_NEW, &node->flags); wake_up(&node->lock_wq); diff --git a/fs/hfsplus/btree.c b/fs/hfsplus/btree.c index 66774f4cb4fd..74fcef3a1628 100644 --- a/fs/hfsplus/btree.c +++ b/fs/hfsplus/btree.c @@ -394,7 +394,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) off += node->page_offset; pagep = node->page + (off >> PAGE_SHIFT); - data = kmap(*pagep); + data = kmap_thread(*pagep); off &= ~PAGE_MASK; idx = 0; @@ -407,7 +407,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) idx += i; data[off] |= m; set_page_dirty(*pagep); - kunmap(*pagep); + kunmap_thread(*pagep); tree->free_nodes--; mark_inode_dirty(tree->inode); hfs_bnode_put(node); @@ -417,14 +417,14 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) } } if (++off >= PAGE_SIZE) { - kunmap(*pagep); - data = kmap(*++pagep); + kunmap_thread(*pagep); + data = kmap_thread(*++pagep); off = 0; } idx += 8; len--; } - kunmap(*pagep); + kunmap_thread(*pagep); nidx = node->next; if (!nidx) { hfs_dbg(BNODE_MOD, "create new bmap node\n"); @@ -440,7 +440,7 @@ struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree) off = off16; off += node->page_offset; pagep = node->page + (off >> PAGE_SHIFT); - data = kmap(*pagep); + data = kmap_thread(*pagep); off &= ~PAGE_MASK; } } @@ -490,7 +490,7 @@ void hfs_bmap_free(struct hfs_bnode *node) } off += node->page_offset + nidx / 8; page = node->page[off >> PAGE_SHIFT]; - data = kmap(page); + data = kmap_thread(page); off &= ~PAGE_MASK; m = 1 << (~nidx & 7); byte = data[off]; @@ -498,13 +498,13 @@ void hfs_bmap_free(struct hfs_bnode *node) pr_crit("trying to free free bnode " "%u(%d)\n", node->this, node->type); - kunmap(page); + kunmap_thread(page); hfs_bnode_put(node); return; } data[off] = byte & ~m; set_page_dirty(page); - kunmap(page); + kunmap_thread(page); hfs_bnode_put(node); tree->free_nodes++; mark_inode_dirty(tree->inode); From patchwork Fri Oct 9 19:49:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285918 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5DA01C43467 for ; Fri, 9 Oct 2020 20:05:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A6CE2225B for ; Fri, 9 Oct 2020 20:05:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390830AbgJIUFj (ORCPT ); Fri, 9 Oct 2020 16:05:39 -0400 Received: from mga01.intel.com ([192.55.52.88]:3555 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389053AbgJITwO (ORCPT ); Fri, 9 Oct 2020 15:52:14 -0400 IronPort-SDR: ZY1DEGETObfXdZFnoxsbKB7fzbzbRt8xd8bKb+YrYXtkHifcbpn+XQoZG1l3r2KlCKayB9JESb /9AfAPRZl62Q== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="182976216" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="182976216" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:01 -0700 IronPort-SDR: tVhE30/49ehqkoc80ZCcDXB4dMTZze5YTnWPIjaBRWP4P6o/AEUDuRNENWQluyt3yOqCx99fob q9C+vTCoMURQ== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="519846944" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:01 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Trond Myklebust , Anna Schumaker , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 21/58] fs/nfs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:49:56 -0700 Message-Id: <20201009195033.3208459-22-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Trond Myklebust Cc: Anna Schumaker Signed-off-by: Ira Weiny --- fs/nfs/dir.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index cb52db9a0cfb..fee321acccb4 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -213,7 +213,7 @@ int nfs_readdir_make_qstr(struct qstr *string, const char *name, unsigned int le static int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) { - struct nfs_cache_array *array = kmap(page); + struct nfs_cache_array *array = kmap_thread(page); struct nfs_cache_array_entry *cache_entry; int ret; @@ -235,7 +235,7 @@ int nfs_readdir_add_to_array(struct nfs_entry *entry, struct page *page) if (entry->eof != 0) array->eof_index = array->size; out: - kunmap(page); + kunmap_thread(page); return ret; } @@ -347,7 +347,7 @@ int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc) struct nfs_cache_array *array; int status; - array = kmap(desc->page); + array = kmap_thread(desc->page); if (*desc->dir_cookie == 0) status = nfs_readdir_search_for_pos(array, desc); @@ -359,7 +359,7 @@ int nfs_readdir_search_array(nfs_readdir_descriptor_t *desc) desc->current_index += array->size; desc->page_index++; } - kunmap(desc->page); + kunmap_thread(desc->page); return status; } @@ -602,10 +602,10 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en out_nopages: if (count == 0 || (status == -EBADCOOKIE && entry->eof != 0)) { - array = kmap(page); + array = kmap_thread(page); array->eof_index = array->size; status = 0; - kunmap(page); + kunmap_thread(page); } put_page(scratch); @@ -669,7 +669,7 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, goto out; } - array = kmap(page); + array = kmap_thread(page); status = nfs_readdir_alloc_pages(pages, array_size); if (status < 0) @@ -691,7 +691,7 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, nfs_readdir_free_pages(pages, array_size); out_release_array: - kunmap(page); + kunmap_thread(page); nfs4_label_free(entry.label); out: nfs_free_fattr(entry.fattr); @@ -803,7 +803,7 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc) struct nfs_cache_array *array = NULL; struct nfs_open_dir_context *ctx = file->private_data; - array = kmap(desc->page); + array = kmap_thread(desc->page); for (i = desc->cache_entry_index; i < array->size; i++) { struct nfs_cache_array_entry *ent; @@ -827,7 +827,7 @@ int nfs_do_filldir(nfs_readdir_descriptor_t *desc) if (array->eof_index >= 0) desc->eof = true; - kunmap(desc->page); + kunmap_thread(desc->page); dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %Lu; returning = %d\n", (unsigned long long)*desc->dir_cookie, res); return res; From patchwork Fri Oct 9 19:49:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285916 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 94BE5C4363D for ; Fri, 9 Oct 2020 20:06:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4E9CF222C3 for ; Fri, 9 Oct 2020 20:06:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391416AbgJIUGY (ORCPT ); Fri, 9 Oct 2020 16:06:24 -0400 Received: from mga03.intel.com ([134.134.136.65]:26030 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387978AbgJITwH (ORCPT ); Fri, 9 Oct 2020 15:52:07 -0400 IronPort-SDR: OTj9s3cvBtRyPQTZAybKfscTVxPDK48TJR7rMLCvUFwCTYBh25MUK6MTvmozzMmi3IFQlUR46z sA4Nku3xxaJQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="165592224" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="165592224" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:05 -0700 IronPort-SDR: UirI0CQIu4U61+QlSzJhUSBnMwMbOjm+hcyTouEwvOwx6I0trp+50TKD6KEUa5cRPFVp+hPY69 eHlTO5RS+u4A== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="343972211" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:04 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Jaegeuk Kim , Chao Yu , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 22/58] fs/f2fs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:49:57 -0700 Message-Id: <20201009195033.3208459-23-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Jaegeuk Kim Cc: Chao Yu Signed-off-by: Ira Weiny --- fs/f2fs/f2fs.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index d9e52a7f3702..ff72a45a577e 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -2410,12 +2410,12 @@ static inline struct page *f2fs_pagecache_get_page( static inline void f2fs_copy_page(struct page *src, struct page *dst) { - char *src_kaddr = kmap(src); - char *dst_kaddr = kmap(dst); + char *src_kaddr = kmap_thread(src); + char *dst_kaddr = kmap_thread(dst); memcpy(dst_kaddr, src_kaddr, PAGE_SIZE); - kunmap(dst); - kunmap(src); + kunmap_thread(dst); + kunmap_thread(src); } static inline void f2fs_put_page(struct page *page, int unlock) From patchwork Fri Oct 9 19:50:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285917 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 39A19C4363A for ; Fri, 9 Oct 2020 20:06:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DD3B520732 for ; Fri, 9 Oct 2020 20:06:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390948AbgJIUFk (ORCPT ); Fri, 9 Oct 2020 16:05:40 -0400 Received: from mga06.intel.com ([134.134.136.31]:1746 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390926AbgJITwV (ORCPT ); Fri, 9 Oct 2020 15:52:21 -0400 IronPort-SDR: y1JJh2sq7n7qvtBHhoeiZDBcJHqQXNvk9XowiHILd4LeNp+F4Dd7RSvV34lAiBY6eVvCkDMg+q 734l2x7TLtxQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="227178997" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="227178997" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:18 -0700 IronPort-SDR: wr8yF8/sTlHJunnzFelUAfkdGIrCwMwbAv+fVYfwv9n4Q9ri2s7tZy/sCWglaZc+50HSVTr6HF aNXvhi/ktrcA== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="518801285" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:18 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Jan Kara , "Theodore Ts'o" , Randy Dunlap , Alex Shi , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 25/58] fs/reiserfs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:00 -0700 Message-Id: <20201009195033.3208459-26-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Jan Kara Cc: "Theodore Ts'o" Cc: Randy Dunlap Cc: Alex Shi Signed-off-by: Ira Weiny --- fs/reiserfs/journal.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c index e98f99338f8f..be8f56261e8c 100644 --- a/fs/reiserfs/journal.c +++ b/fs/reiserfs/journal.c @@ -4194,11 +4194,11 @@ static int do_journal_end(struct reiserfs_transaction_handle *th, int flags) SB_ONDISK_JOURNAL_SIZE(sb))); set_buffer_uptodate(tmp_bh); page = cn->bh->b_page; - addr = kmap(page); + addr = kmap_thread(page); memcpy(tmp_bh->b_data, addr + offset_in_page(cn->bh->b_data), cn->bh->b_size); - kunmap(page); + kunmap_thread(page); mark_buffer_dirty(tmp_bh); jindex++; set_buffer_journal_dirty(cn->bh); From patchwork Fri Oct 9 19:50:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285919 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 799D6C433DF for ; Fri, 9 Oct 2020 20:04:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3140E22284 for ; Fri, 9 Oct 2020 20:04:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391052AbgJIUEW (ORCPT ); Fri, 9 Oct 2020 16:04:22 -0400 Received: from mga11.intel.com ([192.55.52.93]:40547 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389150AbgJITw2 (ORCPT ); Fri, 9 Oct 2020 15:52:28 -0400 IronPort-SDR: JXvRbqfBSh4WcKKhlWmGAJjVVwBBqA0c3vVa62KiqhYKBoCAMWZ7xt97eKLwzIZS1eytWF28Tv 5/HLX+aDaNNA== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162067998" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162067998" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:26 -0700 IronPort-SDR: enOwdrUvox960YRmC5C0rYPH71vGkXRrRSf++MkJJnBOIwe1z1BLjEriaudfjb7SF8F3v1X02a epHq/DZLuLjw== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="355863002" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:25 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Richard Weinberger , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 27/58] fs/ubifs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:02 -0700 Message-Id: <20201009195033.3208459-28-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Richard Weinberger Signed-off-by: Ira Weiny --- fs/ubifs/file.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c index b77d1637bbbc..a3537447a885 100644 --- a/fs/ubifs/file.c +++ b/fs/ubifs/file.c @@ -111,7 +111,7 @@ static int do_readpage(struct page *page) ubifs_assert(c, !PageChecked(page)); ubifs_assert(c, !PagePrivate(page)); - addr = kmap(page); + addr = kmap_thread(page); block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT; beyond = (i_size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT; @@ -174,7 +174,7 @@ static int do_readpage(struct page *page) SetPageUptodate(page); ClearPageError(page); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); return 0; error: @@ -182,7 +182,7 @@ static int do_readpage(struct page *page) ClearPageUptodate(page); SetPageError(page); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); return err; } @@ -616,7 +616,7 @@ static int populate_page(struct ubifs_info *c, struct page *page, dbg_gen("ino %lu, pg %lu, i_size %lld, flags %#lx", inode->i_ino, page->index, i_size, page->flags); - addr = zaddr = kmap(page); + addr = zaddr = kmap_thread(page); end_index = (i_size - 1) >> PAGE_SHIFT; if (!i_size || page->index > end_index) { @@ -692,7 +692,7 @@ static int populate_page(struct ubifs_info *c, struct page *page, SetPageUptodate(page); ClearPageError(page); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); *n = nn; return 0; @@ -700,7 +700,7 @@ static int populate_page(struct ubifs_info *c, struct page *page, ClearPageUptodate(page); SetPageError(page); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); ubifs_err(c, "bad data node (block %u, inode %lu)", page_block, inode->i_ino); return -EINVAL; @@ -918,7 +918,7 @@ static int do_writepage(struct page *page, int len) /* Update radix tree tags */ set_page_writeback(page); - addr = kmap(page); + addr = kmap_thread(page); block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT; i = 0; while (len) { @@ -950,7 +950,7 @@ static int do_writepage(struct page *page, int len) ClearPagePrivate(page); ClearPageChecked(page); - kunmap(page); + kunmap_thread(page); unlock_page(page); end_page_writeback(page); return err; From patchwork Fri Oct 9 19:50:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285920 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7261AC43457 for ; Fri, 9 Oct 2020 20:03:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2E67F22284 for ; Fri, 9 Oct 2020 20:03:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391094AbgJIUDn (ORCPT ); Fri, 9 Oct 2020 16:03:43 -0400 Received: from mga11.intel.com ([192.55.52.93]:40561 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390977AbgJITwj (ORCPT ); Fri, 9 Oct 2020 15:52:39 -0400 IronPort-SDR: Exjvp/k/vju92C/1HmDJJ3INkGiq2BDsyk1PJOB/fYIXN4StFZXIuvzbkTFTF8uhXPVM7irVri H8miumYbiukQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162068015" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162068015" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:38 -0700 IronPort-SDR: y48WLHg756NhaQ3a3jufh8VKJ1E37wUwe8fJ/HzDHZ6hDk/W8p1+XzOieTDyZGUDdKxAAVZp75 YdcYJzI+gesw== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="349957490" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:36 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 30/58] fs/romfs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:05 -0700 Message-Id: <20201009195033.3208459-31-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Signed-off-by: Ira Weiny --- fs/romfs/super.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/romfs/super.c b/fs/romfs/super.c index e582d001f792..9050074c6755 100644 --- a/fs/romfs/super.c +++ b/fs/romfs/super.c @@ -107,7 +107,7 @@ static int romfs_readpage(struct file *file, struct page *page) void *buf; int ret; - buf = kmap(page); + buf = kmap_thread(page); if (!buf) return -ENOMEM; @@ -136,7 +136,7 @@ static int romfs_readpage(struct file *file, struct page *page) SetPageUptodate(page); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); unlock_page(page); return ret; } From patchwork Fri Oct 9 19:50:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285921 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BB90C43467 for ; Fri, 9 Oct 2020 20:03:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C5B0B22284 for ; Fri, 9 Oct 2020 20:03:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388868AbgJIUDA (ORCPT ); Fri, 9 Oct 2020 16:03:00 -0400 Received: from mga17.intel.com ([192.55.52.151]:34052 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389162AbgJITwv (ORCPT ); Fri, 9 Oct 2020 15:52:51 -0400 IronPort-SDR: YF/EO16ey1BoGX9EfmY18dpvftNC1jwDP6F/OKfn0sJmKNFlwp1n+LvAkxE2IbEVHHXLfsBbxO siqEsOiiqWAw== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="145397508" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="145397508" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:50 -0700 IronPort-SDR: 0rzHuL4N+KM4WVW+vmL+eEj1y192PC4ThPKt2jdycOAoxaq6uEUOpoOJAuFDFbsfnCMTEcEeiF lMErav9d18Iw== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="419537108" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:47 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Nicolas Pitre , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 33/58] fs/cramfs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:08 -0700 Message-Id: <20201009195033.3208459-34-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Nicolas Pitre Signed-off-by: Ira Weiny Acked-by: Nicolas Pitre --- fs/cramfs/inode.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c index 912308600d39..003c014a42ed 100644 --- a/fs/cramfs/inode.c +++ b/fs/cramfs/inode.c @@ -247,8 +247,8 @@ static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset, struct page *page = pages[i]; if (page) { - memcpy(data, kmap(page), PAGE_SIZE); - kunmap(page); + memcpy(data, kmap_thread(page), PAGE_SIZE); + kunmap_thread(page); put_page(page); } else memset(data, 0, PAGE_SIZE); @@ -826,7 +826,7 @@ static int cramfs_readpage(struct file *file, struct page *page) maxblock = (inode->i_size + PAGE_SIZE - 1) >> PAGE_SHIFT; bytes_filled = 0; - pgdata = kmap(page); + pgdata = kmap_thread(page); if (page->index < maxblock) { struct super_block *sb = inode->i_sb; @@ -914,13 +914,13 @@ static int cramfs_readpage(struct file *file, struct page *page) memset(pgdata + bytes_filled, 0, PAGE_SIZE - bytes_filled); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); SetPageUptodate(page); unlock_page(page); return 0; err: - kunmap(page); + kunmap_thread(page); ClearPageUptodate(page); SetPageError(page); unlock_page(page); From patchwork Fri Oct 9 19:50:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285922 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2E953C35266 for ; Fri, 9 Oct 2020 20:01:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D670D225A9 for ; Fri, 9 Oct 2020 20:01:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390835AbgJIUBx (ORCPT ); Fri, 9 Oct 2020 16:01:53 -0400 Received: from mga11.intel.com ([192.55.52.93]:40581 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388824AbgJITw6 (ORCPT ); Fri, 9 Oct 2020 15:52:58 -0400 IronPort-SDR: tGU1WWM0mFtP4sQxNjAr1vD1TEE/S82Fwey3kuQK7biXKtIM+OTpRGX42MrzZrbh17sxY7EBCK BJwnIk9ZOKlQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162068045" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162068045" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:55 -0700 IronPort-SDR: TN82OMSOJnR+1dzdu/wtYu+HarPMiqU5tCJLq9k+HDWuiKzSJliaVoZHfBedXzzykRk72guGi9 gJFQG6Pg4N1Q== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="529053748" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:54 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Alexander Viro , Jens Axboe , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 35/58] fs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:10 -0700 Message-Id: <20201009195033.3208459-36-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny These kmap() calls are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Alexander Viro Cc: Jens Axboe Signed-off-by: Ira Weiny --- fs/aio.c | 4 ++-- fs/binfmt_elf.c | 4 ++-- fs/binfmt_elf_fdpic.c | 4 ++-- fs/exec.c | 10 +++++----- fs/io_uring.c | 4 ++-- fs/splice.c | 4 ++-- 6 files changed, 15 insertions(+), 15 deletions(-) diff --git a/fs/aio.c b/fs/aio.c index d5ec30385566..27f95996d25f 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -1223,10 +1223,10 @@ static long aio_read_events_ring(struct kioctx *ctx, avail = min(avail, nr - ret); avail = min_t(long, avail, AIO_EVENTS_PER_PAGE - pos); - ev = kmap(page); + ev = kmap_thread(page); copy_ret = copy_to_user(event + ret, ev + pos, sizeof(*ev) * avail); - kunmap(page); + kunmap_thread(page); if (unlikely(copy_ret)) { ret = -EFAULT; diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 13d053982dd7..1a332ef1ae03 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -2430,9 +2430,9 @@ static int elf_core_dump(struct coredump_params *cprm) page = get_dump_page(addr); if (page) { - void *kaddr = kmap(page); + void *kaddr = kmap_thread(page); stop = !dump_emit(cprm, kaddr, PAGE_SIZE); - kunmap(page); + kunmap_thread(page); put_page(page); } else stop = !dump_skip(cprm, PAGE_SIZE); diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c index 50f845702b92..8fbe188e0fdd 100644 --- a/fs/binfmt_elf_fdpic.c +++ b/fs/binfmt_elf_fdpic.c @@ -1542,9 +1542,9 @@ static bool elf_fdpic_dump_segments(struct coredump_params *cprm) bool res; struct page *page = get_dump_page(addr); if (page) { - void *kaddr = kmap(page); + void *kaddr = kmap_thread(page); res = dump_emit(cprm, kaddr, PAGE_SIZE); - kunmap(page); + kunmap_thread(page); put_page(page); } else { res = dump_skip(cprm, PAGE_SIZE); diff --git a/fs/exec.c b/fs/exec.c index a91003e28eaa..3948b8511e3a 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -575,11 +575,11 @@ static int copy_strings(int argc, struct user_arg_ptr argv, if (kmapped_page) { flush_kernel_dcache_page(kmapped_page); - kunmap(kmapped_page); + kunmap_thread(kmapped_page); put_arg_page(kmapped_page); } kmapped_page = page; - kaddr = kmap(kmapped_page); + kaddr = kmap_thread(kmapped_page); kpos = pos & PAGE_MASK; flush_arg_page(bprm, kpos, kmapped_page); } @@ -593,7 +593,7 @@ static int copy_strings(int argc, struct user_arg_ptr argv, out: if (kmapped_page) { flush_kernel_dcache_page(kmapped_page); - kunmap(kmapped_page); + kunmap_thread(kmapped_page); put_arg_page(kmapped_page); } return ret; @@ -871,11 +871,11 @@ int transfer_args_to_stack(struct linux_binprm *bprm, for (index = MAX_ARG_PAGES - 1; index >= stop; index--) { unsigned int offset = index == stop ? bprm->p & ~PAGE_MASK : 0; - char *src = kmap(bprm->page[index]) + offset; + char *src = kmap_thread(bprm->page[index]) + offset; sp -= PAGE_SIZE - offset; if (copy_to_user((void *) sp, src, PAGE_SIZE - offset) != 0) ret = -EFAULT; - kunmap(bprm->page[index]); + kunmap_thread(bprm->page[index]); if (ret) goto out; } diff --git a/fs/io_uring.c b/fs/io_uring.c index aae0ef2ec34d..f59bb079822d 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2903,7 +2903,7 @@ static ssize_t loop_rw_iter(int rw, struct file *file, struct kiocb *kiocb, iovec = iov_iter_iovec(iter); } else { /* fixed buffers import bvec */ - iovec.iov_base = kmap(iter->bvec->bv_page) + iovec.iov_base = kmap_thread(iter->bvec->bv_page) + iter->iov_offset; iovec.iov_len = min(iter->count, iter->bvec->bv_len - iter->iov_offset); @@ -2918,7 +2918,7 @@ static ssize_t loop_rw_iter(int rw, struct file *file, struct kiocb *kiocb, } if (iov_iter_is_bvec(iter)) - kunmap(iter->bvec->bv_page); + kunmap_thread(iter->bvec->bv_page); if (nr < 0) { if (!ret) diff --git a/fs/splice.c b/fs/splice.c index ce75aec52274..190c4d218c30 100644 --- a/fs/splice.c +++ b/fs/splice.c @@ -815,9 +815,9 @@ static int write_pipe_buf(struct pipe_inode_info *pipe, struct pipe_buffer *buf, void *data; loff_t tmp = sd->pos; - data = kmap(buf->page); + data = kmap_thread(buf->page); ret = __kernel_write(sd->u.file, data + buf->offset, sd->len, &tmp); - kunmap(buf->page); + kunmap_thread(buf->page); return ret; } From patchwork Fri Oct 9 19:50:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285923 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EEFE3C9DC96 for ; Fri, 9 Oct 2020 20:01:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A1538222C8 for ; Fri, 9 Oct 2020 20:01:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390684AbgJIUBN (ORCPT ); Fri, 9 Oct 2020 16:01:13 -0400 Received: from mga18.intel.com ([134.134.136.126]:42454 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389721AbgJITxQ (ORCPT ); Fri, 9 Oct 2020 15:53:16 -0400 IronPort-SDR: /0PxmQQKh9INXhqYDaA/qd0UIC/Ocy9AjDBS2exom/XczYR4EeFFQ0eDp921T8r9Qs7rCQoehA KURfPAOckKjQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="153363728" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="153363728" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:59 -0700 IronPort-SDR: Wf0Bi1Gs1P3ZgILN9Dk8+ODZhbqXc7J3tJZabe+2AUx5fg/nQYQB2E9E/9NHNQgBhyfVAmIu+q D7ag8zQ3enrg== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="462300964" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:52:58 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Jan Kara , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 36/58] fs/ext2: Use ext2_put_page Date: Fri, 9 Oct 2020 12:50:11 -0700 Message-Id: <20201009195033.3208459-37-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny There are 3 places in namei.c where the equivalent of ext2_put_page() is open coded. We want to use k[un]map_thread() instead of k[un]map() in ext2_[get|put]_page(). Move ext2_put_page() to ext2.h and use it in namei.c in prep for converting the k[un]map() code. Cc: Jan Kara Signed-off-by: Ira Weiny --- fs/ext2/dir.c | 6 ------ fs/ext2/ext2.h | 8 ++++++++ fs/ext2/namei.c | 15 +++++---------- 3 files changed, 13 insertions(+), 16 deletions(-) diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c index 70355ab6740e..f3194bf20733 100644 --- a/fs/ext2/dir.c +++ b/fs/ext2/dir.c @@ -66,12 +66,6 @@ static inline unsigned ext2_chunk_size(struct inode *inode) return inode->i_sb->s_blocksize; } -static inline void ext2_put_page(struct page *page) -{ - kunmap(page); - put_page(page); -} - /* * Return the offset into page `page_nr' of the last valid * byte in that page, plus one. diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index 5136b7289e8d..021ec8b42ac3 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -16,6 +16,8 @@ #include #include #include +#include +#include /* XXX Here for now... not interested in restructing headers JUST now */ @@ -745,6 +747,12 @@ extern int ext2_delete_entry (struct ext2_dir_entry_2 *, struct page *); extern int ext2_empty_dir (struct inode *); extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **); extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page *, struct inode *, int); +static inline void ext2_put_page(struct page *page) +{ + kunmap(page); + put_page(page); +} + /* ialloc.c */ extern struct inode * ext2_new_inode (struct inode *, umode_t, const struct qstr *); diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c index 5bf2c145643b..ea980f1e2e99 100644 --- a/fs/ext2/namei.c +++ b/fs/ext2/namei.c @@ -389,23 +389,18 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry, if (dir_de) { if (old_dir != new_dir) ext2_set_link(old_inode, dir_de, dir_page, new_dir, 0); - else { - kunmap(dir_page); - put_page(dir_page); - } + else + ext2_put_page(dir_page); inode_dec_link_count(old_dir); } return 0; out_dir: - if (dir_de) { - kunmap(dir_page); - put_page(dir_page); - } + if (dir_de) + ext2_put_page(dir_page); out_old: - kunmap(old_page); - put_page(old_page); + ext2_put_page(old_page); out: return err; } From patchwork Fri Oct 9 19:50:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285925 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BFF0AC6379F for ; Fri, 9 Oct 2020 19:59:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7C35822267 for ; Fri, 9 Oct 2020 19:59:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388385AbgJIT72 (ORCPT ); Fri, 9 Oct 2020 15:59:28 -0400 Received: from mga01.intel.com ([192.55.52.88]:3593 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391078AbgJITxW (ORCPT ); Fri, 9 Oct 2020 15:53:22 -0400 IronPort-SDR: TuW6f/eUiPOWBVUWPJSST+0egNgNIn2HyrjOLitLNnO3XIXYcZZ7k6u/vtD7EeyPkkCEzhJArJ zTM7g1ijBJ7w== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="182976382" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="182976382" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:02 -0700 IronPort-SDR: bH2kRxXxeY8kuFBN5R8RneSpQbEQLW5eawptefbcIpm8xkU067aWcbaReXxx6/6TDXgDaxiIQ5 8lenxDucas2g== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="519847131" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:02 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Jan Kara , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 37/58] fs/ext2: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:12 -0700 Message-Id: <20201009195033.3208459-38-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny These kmap() calls are localized to a single thread. To avoid the over head of global PKRS update use the new kmap_thread() call instead. Cc: Jan Kara Signed-off-by: Ira Weiny --- fs/ext2/dir.c | 2 +- fs/ext2/ext2.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c index f3194bf20733..abe97ba458c8 100644 --- a/fs/ext2/dir.c +++ b/fs/ext2/dir.c @@ -196,7 +196,7 @@ static struct page * ext2_get_page(struct inode *dir, unsigned long n, struct address_space *mapping = dir->i_mapping; struct page *page = read_mapping_page(mapping, n, NULL); if (!IS_ERR(page)) { - kmap(page); + kmap_thread(page); if (unlikely(!PageChecked(page))) { if (PageError(page) || !ext2_check_page(page, quiet)) goto fail; diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index 021ec8b42ac3..9bcb6714c255 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -749,7 +749,7 @@ extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **); extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page *, struct inode *, int); static inline void ext2_put_page(struct page *page) { - kunmap(page); + kunmap_thread(page); put_page(page); } From patchwork Fri Oct 9 19:50:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285924 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35615C561F8 for ; Fri, 9 Oct 2020 20:00:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D775E22403 for ; Fri, 9 Oct 2020 20:00:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388331AbgJIUAS (ORCPT ); Fri, 9 Oct 2020 16:00:18 -0400 Received: from mga11.intel.com ([192.55.52.93]:40547 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388887AbgJITxV (ORCPT ); Fri, 9 Oct 2020 15:53:21 -0400 IronPort-SDR: zq5dvuFd6jXpbgXHXDd3kanr7kGVYAspkSVx4KqGtzBddQtGcPnRKRjJwx5QrQv4TFmaka5zeS Gu84SEdAGvPQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162068063" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162068063" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:06 -0700 IronPort-SDR: +9tLMQNrOc9ZmtQe+NKSSXZyhjRooFfxfongQijBj4blQjg4c6+fJ/ZHkl3bUeAx7HZ0qDTuwd uW08H1SVCXkg== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="343972363" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:05 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 38/58] fs/isofs: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:13 -0700 Message-Id: <20201009195033.3208459-39-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny These kmap() calls are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Signed-off-by: Ira Weiny --- fs/isofs/compress.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/isofs/compress.c b/fs/isofs/compress.c index bc12ac7e2312..ddd3fd99d2e1 100644 --- a/fs/isofs/compress.c +++ b/fs/isofs/compress.c @@ -344,7 +344,7 @@ static int zisofs_readpage(struct file *file, struct page *page) pages[i] = grab_cache_page_nowait(mapping, index); if (pages[i]) { ClearPageError(pages[i]); - kmap(pages[i]); + kmap_thread(pages[i]); } } @@ -356,7 +356,7 @@ static int zisofs_readpage(struct file *file, struct page *page) flush_dcache_page(pages[i]); if (i == full_page && err) SetPageError(pages[i]); - kunmap(pages[i]); + kunmap_thread(pages[i]); unlock_page(pages[i]); if (i != full_page) put_page(pages[i]); From patchwork Fri Oct 9 19:50:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285926 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 42016C9DCB7 for ; Fri, 9 Oct 2020 19:59:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1ABAF22403 for ; Fri, 9 Oct 2020 19:59:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390207AbgJIT7D (ORCPT ); Fri, 9 Oct 2020 15:59:03 -0400 Received: from mga11.intel.com ([192.55.52.93]:40581 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391084AbgJITxY (ORCPT ); Fri, 9 Oct 2020 15:53:24 -0400 IronPort-SDR: u2C4+hGb35+mtK+ndhIxjBMDcky7nNybvSNM6b4gqHKiqPmi0zpuRfougNCgV6H0aeq0l38fWM RPrL1Si+UaTw== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="162068110" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="162068110" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:23 -0700 IronPort-SDR: 1WKybDcesSB1sLOn62ClPw5Oz5roBPmtIQsa1XcymP/Rm5On5MJ4hIzRHLHnwze0O/9dY0G7BT oI/HBaoknNhQ== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="355863255" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:21 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Ulf Hansson , Sascha Sommer , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 43/58] drivers/mmc: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:18 -0700 Message-Id: <20201009195033.3208459-44-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny These kmap() calls are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Ulf Hansson Cc: Sascha Sommer Signed-off-by: Ira Weiny --- drivers/mmc/host/mmc_spi.c | 4 ++-- drivers/mmc/host/sdricoh_cs.c | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c index 18a850f37ddc..ab28e7103b8d 100644 --- a/drivers/mmc/host/mmc_spi.c +++ b/drivers/mmc/host/mmc_spi.c @@ -918,7 +918,7 @@ mmc_spi_data_do(struct mmc_spi_host *host, struct mmc_command *cmd, } /* allow pio too; we don't allow highmem */ - kmap_addr = kmap(sg_page(sg)); + kmap_addr = kmap_thread(sg_page(sg)); if (direction == DMA_TO_DEVICE) t->tx_buf = kmap_addr + sg->offset; else @@ -950,7 +950,7 @@ mmc_spi_data_do(struct mmc_spi_host *host, struct mmc_command *cmd, /* discard mappings */ if (direction == DMA_FROM_DEVICE) flush_kernel_dcache_page(sg_page(sg)); - kunmap(sg_page(sg)); + kunmap_thread(sg_page(sg)); if (dma_dev) dma_unmap_page(dma_dev, dma_addr, PAGE_SIZE, dir); diff --git a/drivers/mmc/host/sdricoh_cs.c b/drivers/mmc/host/sdricoh_cs.c index 76a8cd3a186f..7806bc69c4f1 100644 --- a/drivers/mmc/host/sdricoh_cs.c +++ b/drivers/mmc/host/sdricoh_cs.c @@ -312,11 +312,11 @@ static void sdricoh_request(struct mmc_host *mmc, struct mmc_request *mrq) int result; page = sg_page(data->sg); - buf = kmap(page) + data->sg->offset + (len * i); + buf = kmap_thread(page) + data->sg->offset + (len * i); result = sdricoh_blockio(host, data->flags & MMC_DATA_READ, buf, len); - kunmap(page); + kunmap_thread(page); flush_dcache_page(page); if (result) { dev_err(dev, "sdricoh_request: cmd %i " From patchwork Fri Oct 9 19:50:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285927 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 19E9FC9DC8D for ; Fri, 9 Oct 2020 19:58:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E1A7822403 for ; Fri, 9 Oct 2020 19:58:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390375AbgJIT6J (ORCPT ); Fri, 9 Oct 2020 15:58:09 -0400 Received: from mga05.intel.com ([192.55.52.43]:56506 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391106AbgJITxa (ORCPT ); Fri, 9 Oct 2020 15:53:30 -0400 IronPort-SDR: m8JsRDkVm7MuHdZA6Q/Wi+HEQskWKUPBnn02eowZAiho4j2b9XK2EVfHcV4ZPwqltdHnZP0RWM 2jCA1vqgkWjg== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="250226295" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="250226295" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:28 -0700 IronPort-SDR: BOVOU8SHaQbMr+qBBSrCzuqbJHuQd4ndzwss05aaSC7o5I30ANXdekITPCnqmJ5xtHPcWbAp0e 1H/r6jgeLwtA== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="298419945" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:28 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Ard Biesheuvel , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 45/58] drivers/firmware: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:20 -0700 Message-Id: <20201009195033.3208459-46-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny These kmap() calls are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Ard Biesheuvel Signed-off-by: Ira Weiny --- drivers/firmware/efi/capsule-loader.c | 6 +++--- drivers/firmware/efi/capsule.c | 4 ++-- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/firmware/efi/capsule-loader.c b/drivers/firmware/efi/capsule-loader.c index 4dde8edd53b6..aa2e0b5940fd 100644 --- a/drivers/firmware/efi/capsule-loader.c +++ b/drivers/firmware/efi/capsule-loader.c @@ -197,7 +197,7 @@ static ssize_t efi_capsule_write(struct file *file, const char __user *buff, page = cap_info->pages[cap_info->index - 1]; } - kbuff = kmap(page); + kbuff = kmap_thread(page); kbuff += PAGE_SIZE - cap_info->page_bytes_remain; /* Copy capsule binary data from user space to kernel space buffer */ @@ -217,7 +217,7 @@ static ssize_t efi_capsule_write(struct file *file, const char __user *buff, } cap_info->count += write_byte; - kunmap(page); + kunmap_thread(page); /* Submit the full binary to efi_capsule_update() API */ if (cap_info->header.headersize > 0 && @@ -236,7 +236,7 @@ static ssize_t efi_capsule_write(struct file *file, const char __user *buff, return write_byte; fail_unmap: - kunmap(page); + kunmap_thread(page); failed: efi_free_all_buff_pages(cap_info); return ret; diff --git a/drivers/firmware/efi/capsule.c b/drivers/firmware/efi/capsule.c index 598b7800d14e..edb7797b0e4f 100644 --- a/drivers/firmware/efi/capsule.c +++ b/drivers/firmware/efi/capsule.c @@ -244,7 +244,7 @@ int efi_capsule_update(efi_capsule_header_t *capsule, phys_addr_t *pages) for (i = 0; i < sg_count; i++) { efi_capsule_block_desc_t *sglist; - sglist = kmap(sg_pages[i]); + sglist = kmap_thread(sg_pages[i]); for (j = 0; j < SGLIST_PER_PAGE && count > 0; j++) { u64 sz = min_t(u64, imagesize, @@ -265,7 +265,7 @@ int efi_capsule_update(efi_capsule_header_t *capsule, phys_addr_t *pages) else sglist[j].data = page_to_phys(sg_pages[i + 1]); - kunmap(sg_pages[i]); + kunmap_thread(sg_pages[i]); } mutex_lock(&capsule_mutex); From patchwork Fri Oct 9 19:50:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285928 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E211BC8303B for ; Fri, 9 Oct 2020 19:58:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B8CF6225A9 for ; Fri, 9 Oct 2020 19:58:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390467AbgJIT5t (ORCPT ); Fri, 9 Oct 2020 15:57:49 -0400 Received: from mga01.intel.com ([192.55.52.88]:3762 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391129AbgJITxd (ORCPT ); Fri, 9 Oct 2020 15:53:33 -0400 IronPort-SDR: aPoTh4HYeyMS5wGKHIAu0q7/f7DJkClVaj4/EXRmOBmEgcBC+Tg0jAYwjzvyrMLVRskCkInAMu EgiQjSb9DIJw== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="182976460" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="182976460" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:31 -0700 IronPort-SDR: tmjEkPyqc7ovqgXQGaOUDyTXP+wKCpLd9SWVbWzn6wrJD59J17IHvt5wfRHDxw49UwqlYvaTbK hGdPiXGJDlXQ== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="349957787" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:31 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Greg Kroah-Hartman , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 46/58] drives/staging: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:21 -0700 Message-Id: <20201009195033.3208459-47-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny These kmap() calls are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Greg Kroah-Hartman Signed-off-by: Ira Weiny --- drivers/staging/rts5208/rtsx_transport.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/rts5208/rtsx_transport.c b/drivers/staging/rts5208/rtsx_transport.c index 0027bcf638ad..f747cc23951b 100644 --- a/drivers/staging/rts5208/rtsx_transport.c +++ b/drivers/staging/rts5208/rtsx_transport.c @@ -92,13 +92,13 @@ unsigned int rtsx_stor_access_xfer_buf(unsigned char *buffer, while (sglen > 0) { unsigned int plen = min(sglen, (unsigned int) PAGE_SIZE - poff); - unsigned char *ptr = kmap(page); + unsigned char *ptr = kmap_thread(page); if (dir == TO_XFER_BUF) memcpy(ptr + poff, buffer + cnt, plen); else memcpy(buffer + cnt, ptr + poff, plen); - kunmap(page); + kunmap_thread(page); /* Start at the beginning of the next page */ poff = 0; From patchwork Fri Oct 9 19:50:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285929 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3FD3DC8302A for ; Fri, 9 Oct 2020 19:57:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D8D12225A9 for ; Fri, 9 Oct 2020 19:57:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390201AbgJIT5I (ORCPT ); Fri, 9 Oct 2020 15:57:08 -0400 Received: from mga05.intel.com ([192.55.52.43]:56531 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391159AbgJITxp (ORCPT ); Fri, 9 Oct 2020 15:53:45 -0400 IronPort-SDR: Zi8fB/10ZdxwgrOQJLoGHp29GfkIGrQILKgo8B8+JwyOVRnOCR6id+o1zPE8oNQtf0YN5WB/Pq Myx+WV+qE/+A== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="250226326" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="250226326" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:43 -0700 IronPort-SDR: Uit4axCqwtogby85Iv/hBLI1Moj4COtsBpPB5jXSVWpuENwpihzSQwSQg3nZnBMabzVvybSK2I 1kQ4taZ9oZgQ== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="298531484" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:43 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Greg Kroah-Hartman , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 50/58] drivers/android: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:25 -0700 Message-Id: <20201009195033.3208459-51-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny These kmap() calls are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Greg Kroah-Hartman Signed-off-by: Ira Weiny --- drivers/android/binder_alloc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c index 69609696a843..5f50856caad7 100644 --- a/drivers/android/binder_alloc.c +++ b/drivers/android/binder_alloc.c @@ -1118,9 +1118,9 @@ binder_alloc_copy_user_to_buffer(struct binder_alloc *alloc, page = binder_alloc_get_page(alloc, buffer, buffer_offset, &pgoff); size = min_t(size_t, bytes, PAGE_SIZE - pgoff); - kptr = kmap(page) + pgoff; + kptr = kmap_thread(page) + pgoff; ret = copy_from_user(kptr, from, size); - kunmap(page); + kunmap_thread(page); if (ret) return bytes - size + ret; bytes -= size; From patchwork Fri Oct 9 19:50:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285930 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ADBB9C83BB1 for ; Fri, 9 Oct 2020 19:56:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8516022B4B for ; Fri, 9 Oct 2020 19:56:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391494AbgJIT4d (ORCPT ); Fri, 9 Oct 2020 15:56:33 -0400 Received: from mga01.intel.com ([192.55.52.88]:3799 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391193AbgJITxu (ORCPT ); Fri, 9 Oct 2020 15:53:50 -0400 IronPort-SDR: MvNEL5UE1YZMf2FFryOugVO1MjMPvxhOr9+ZaSGMEz70R+AZvmLzfRjcHaH4uHG4JrQCtBf6H0 UOe6thpPlnjQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="182976499" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="182976499" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:48 -0700 IronPort-SDR: hSLATPILKZexzU9UbulfkIo/q3wPUuwdHpgGfd67f9RjOUrzIM+GeKhbZtX4gmiSR0zMVEA6Pm bSqmX2bz2skQ== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="529054109" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:46 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Eric Biederman , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 51/58] kernel: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:26 -0700 Message-Id: <20201009195033.3208459-52-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny This kmap() call is localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Eric Biederman Signed-off-by: Ira Weiny Acked-by: "Eric W. Biederman" --- kernel/kexec_core.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c index c19c0dad1ebe..272a9920c0d6 100644 --- a/kernel/kexec_core.c +++ b/kernel/kexec_core.c @@ -815,7 +815,7 @@ static int kimage_load_normal_segment(struct kimage *image, if (result < 0) goto out; - ptr = kmap(page); + ptr = kmap_thread(page); /* Start with a clear page */ clear_page(ptr); ptr += maddr & ~PAGE_MASK; @@ -828,7 +828,7 @@ static int kimage_load_normal_segment(struct kimage *image, memcpy(ptr, kbuf, uchunk); else result = copy_from_user(ptr, buf, uchunk); - kunmap(page); + kunmap_thread(page); if (result) { result = -EFAULT; goto out; @@ -879,7 +879,7 @@ static int kimage_load_crash_segment(struct kimage *image, goto out; } arch_kexec_post_alloc_pages(page_address(page), 1, 0); - ptr = kmap(page); + ptr = kmap_thread(page); ptr += maddr & ~PAGE_MASK; mchunk = min_t(size_t, mbytes, PAGE_SIZE - (maddr & ~PAGE_MASK)); @@ -895,7 +895,7 @@ static int kimage_load_crash_segment(struct kimage *image, else result = copy_from_user(ptr, buf, uchunk); kexec_flush_icache_page(page); - kunmap(page); + kunmap_thread(page); arch_kexec_pre_free_pages(page_address(page), 1); if (result) { result = -EFAULT; From patchwork Fri Oct 9 19:50:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285931 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9CC69C832FE for ; Fri, 9 Oct 2020 19:56:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 690C022B48 for ; Fri, 9 Oct 2020 19:56:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391430AbgJITzq (ORCPT ); Fri, 9 Oct 2020 15:55:46 -0400 Received: from mga12.intel.com ([192.55.52.136]:29384 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389355AbgJITxz (ORCPT ); Fri, 9 Oct 2020 15:53:55 -0400 IronPort-SDR: bDmNjnNdMRZ+ioxLx0lwsy0xCkRGcoIkF1uO7/DGxT31PMyi/yHsDFfOYXBkHjpwCB8GF2sqCK rdqgPQHF8a+Q== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="144851091" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="144851091" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:54 -0700 IronPort-SDR: bZn0Zma13YkX7FJFkNsCYMjMNff2FSiB/MgoUwYT50qMOfu0yRYfZtOtUYx1uwuwPtN+tdFX+r hwly4wq6Ikyg== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="519847271" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:53 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Alexander Viro , =?utf-8?b?SsOpcsO0bWUgR2xp?= =?utf-8?q?sse?= , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , John Fastabend , KP Singh , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 53/58] lib: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:28 -0700 Message-Id: <20201009195033.3208459-54-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny These kmap() calls are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Alexander Viro Cc: "Jérôme Glisse" Cc: Martin KaFai Lau Cc: Song Liu Cc: Yonghong Song Cc: Andrii Nakryiko Cc: John Fastabend Cc: KP Singh Signed-off-by: Ira Weiny --- lib/iov_iter.c | 12 ++++++------ lib/test_bpf.c | 4 ++-- lib/test_hmm.c | 8 ++++---- 3 files changed, 12 insertions(+), 12 deletions(-) diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 5e40786c8f12..1d47f957cf95 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -208,7 +208,7 @@ static size_t copy_page_to_iter_iovec(struct page *page, size_t offset, size_t b } /* Too bad - revert to non-atomic kmap */ - kaddr = kmap(page); + kaddr = kmap_thread(page); from = kaddr + offset; left = copyout(buf, from, copy); copy -= left; @@ -225,7 +225,7 @@ static size_t copy_page_to_iter_iovec(struct page *page, size_t offset, size_t b from += copy; bytes -= copy; } - kunmap(page); + kunmap_thread(page); done: if (skip == iov->iov_len) { @@ -292,7 +292,7 @@ static size_t copy_page_from_iter_iovec(struct page *page, size_t offset, size_t } /* Too bad - revert to non-atomic kmap */ - kaddr = kmap(page); + kaddr = kmap_thread(page); to = kaddr + offset; left = copyin(to, buf, copy); copy -= left; @@ -309,7 +309,7 @@ static size_t copy_page_from_iter_iovec(struct page *page, size_t offset, size_t to += copy; bytes -= copy; } - kunmap(page); + kunmap_thread(page); done: if (skip == iov->iov_len) { @@ -1742,10 +1742,10 @@ int iov_iter_for_each_range(struct iov_iter *i, size_t bytes, return 0; iterate_all_kinds(i, bytes, v, -EINVAL, ({ - w.iov_base = kmap(v.bv_page) + v.bv_offset; + w.iov_base = kmap_thread(v.bv_page) + v.bv_offset; w.iov_len = v.bv_len; err = f(&w, context); - kunmap(v.bv_page); + kunmap_thread(v.bv_page); err;}), ({ w = v; err = f(&w, context);}) diff --git a/lib/test_bpf.c b/lib/test_bpf.c index ca7d635bccd9..441f822f56ba 100644 --- a/lib/test_bpf.c +++ b/lib/test_bpf.c @@ -6506,11 +6506,11 @@ static void *generate_test_data(struct bpf_test *test, int sub) if (!page) goto err_kfree_skb; - ptr = kmap(page); + ptr = kmap_thread(page); if (!ptr) goto err_free_page; memcpy(ptr, test->frag_data, MAX_DATA); - kunmap(page); + kunmap_thread(page); skb_add_rx_frag(skb, 0, page, 0, MAX_DATA, MAX_DATA); } diff --git a/lib/test_hmm.c b/lib/test_hmm.c index e7dc3de355b7..e40d26f97f45 100644 --- a/lib/test_hmm.c +++ b/lib/test_hmm.c @@ -329,9 +329,9 @@ static int dmirror_do_read(struct dmirror *dmirror, unsigned long start, if (!page) return -ENOENT; - tmp = kmap(page); + tmp = kmap_thread(page); memcpy(ptr, tmp, PAGE_SIZE); - kunmap(page); + kunmap_thread(page); ptr += PAGE_SIZE; bounce->cpages++; @@ -398,9 +398,9 @@ static int dmirror_do_write(struct dmirror *dmirror, unsigned long start, if (!page || xa_pointer_tag(entry) != DPT_XA_TAG_WRITE) return -ENOENT; - tmp = kmap(page); + tmp = kmap_thread(page); memcpy(tmp, ptr, PAGE_SIZE); - kunmap(page); + kunmap_thread(page); ptr += PAGE_SIZE; bounce->cpages++; From patchwork Fri Oct 9 19:50:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285932 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 19137C832FB for ; Fri, 9 Oct 2020 19:56:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C562622B48 for ; Fri, 9 Oct 2020 19:56:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391437AbgJITzq (ORCPT ); Fri, 9 Oct 2020 15:55:46 -0400 Received: from mga09.intel.com ([134.134.136.24]:28724 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391234AbgJITx7 (ORCPT ); Fri, 9 Oct 2020 15:53:59 -0400 IronPort-SDR: 3iDe5NejxsDh9FOYg6KOLN9iu6KOFOJjJxeE0i5kD8Ld7EF88MErV+Y2f55npStNuALGtPOVmt VstioKeBLamQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="165643381" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="165643381" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:57 -0700 IronPort-SDR: I2dap8dqfU4jkUPjfDUEInlXytro00aRpG9kPai7q+149QpAXJ//5ZcvM1PB/3zTdLq6ZFWD0B HAucu70KNsIA== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="343972515" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:53:56 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , Benjamin Herrenschmidt , Paul Mackerras , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 54/58] powerpc: Utilize new kmap_thread() Date: Fri, 9 Oct 2020 12:50:29 -0700 Message-Id: <20201009195033.3208459-55-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny These kmap() calls are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Signed-off-by: Ira Weiny --- arch/powerpc/mm/mem.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 42e25874f5a8..6ef557b8dda6 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -573,9 +573,9 @@ void flush_icache_user_page(struct vm_area_struct *vma, struct page *page, { unsigned long maddr; - maddr = (unsigned long) kmap(page) + (addr & ~PAGE_MASK); + maddr = (unsigned long) kmap_thread(page) + (addr & ~PAGE_MASK); flush_icache_range(maddr, maddr + len); - kunmap(page); + kunmap_thread(page); } /* From patchwork Fri Oct 9 19:50:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285933 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20B70C832DE for ; Fri, 9 Oct 2020 19:55:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ECEC922B48 for ; Fri, 9 Oct 2020 19:55:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391259AbgJITyH (ORCPT ); Fri, 9 Oct 2020 15:54:07 -0400 Received: from mga14.intel.com ([192.55.52.115]:15724 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391245AbgJITyG (ORCPT ); Fri, 9 Oct 2020 15:54:06 -0400 IronPort-SDR: 7qaDjl2/ZxevUxp9SIgeuOAu8od3VQFfONS9RP6IrIk3xZmTXRvkzFi7/Qwdz+i1yGXcanWplh jXuBSYf4vxRQ== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="164744163" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="164744163" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:54:04 -0700 IronPort-SDR: NEiErKYZfPZGqrWyxIZ0z43ef9+IKjrcXd9NJIRckxXQwdDEMd5poh/dknsqhifod6Ym/UoaZd Mu4h9c7DJvbA== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="462301216" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:54:03 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 56/58] dax: Stray access protection for dax_direct_access() Date: Fri, 9 Oct 2020 12:50:31 -0700 Message-Id: <20201009195033.3208459-57-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny dax_direct_access() is a special case of accessing pmem via a page offset and without a struct page. Because the dax driver is well aware of the special protections it has mapped memory with, call dev_access_[en|dis]able() directly instead of the unnecessary overhead of trying to get a page to kmap. Similar to kmap, we leverage existing functions, dax_read_[un]lock(), because they are already required to surround the use of the memory returned from dax_direct_access(). Signed-off-by: Ira Weiny --- drivers/dax/super.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index e84070b55463..0ddb3ee73e36 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -30,6 +30,7 @@ static DEFINE_SPINLOCK(dax_host_lock); int dax_read_lock(void) { + dev_access_enable(false); return srcu_read_lock(&dax_srcu); } EXPORT_SYMBOL_GPL(dax_read_lock); @@ -37,6 +38,7 @@ EXPORT_SYMBOL_GPL(dax_read_lock); void dax_read_unlock(int id) { srcu_read_unlock(&dax_srcu, id); + dev_access_disable(false); } EXPORT_SYMBOL_GPL(dax_read_unlock); From patchwork Fri Oct 9 19:50:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 285934 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8703C55ABD for ; Fri, 9 Oct 2020 19:54:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C475222B4B for ; Fri, 9 Oct 2020 19:54:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391349AbgJITyt (ORCPT ); Fri, 9 Oct 2020 15:54:49 -0400 Received: from mga12.intel.com ([192.55.52.136]:29419 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391275AbgJITyL (ORCPT ); Fri, 9 Oct 2020 15:54:11 -0400 IronPort-SDR: q1PZMJUmKFKlQ0BClGvwyzOjNwzGSo5B944T29UwXjVfp2YopDniYa7pTU6UFtwNvsti9h6T08 dfV2TT7Nz02w== X-IronPort-AV: E=McAfee;i="6000,8403,9769"; a="144851137" X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="144851137" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:54:10 -0700 IronPort-SDR: LoljxrxdEbdUiebRGt6guGtjo6SPfpWGHMJuLgTgYB7BeDU8CJtiGau7DzbQyZ+Y5gpHVnCtT5 urTwCEpflSRg== X-IronPort-AV: E=Sophos;i="5.77,355,1596524400"; d="scan'208";a="343972696" Received: from iweiny-desk2.sc.intel.com (HELO localhost) ([10.3.52.147]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2020 12:54:09 -0700 From: ira.weiny@intel.com To: Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Andy Lutomirski , Peter Zijlstra Cc: Ira Weiny , x86@kernel.org, Dave Hansen , Dan Williams , Fenghua Yu , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, kexec@lists.infradead.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, devel@driverdev.osuosl.org, linux-efi@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-nfs@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-aio@kvack.org, io-uring@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-um@lists.infradead.org, linux-ntfs-dev@lists.sourceforge.net, reiserfs-devel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, cluster-devel@redhat.com, ecryptfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-afs@lists.infradead.org, linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, drbd-dev@lists.linbit.com, linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-cachefs@redhat.com, samba-technical@lists.samba.org, intel-wired-lan@lists.osuosl.org Subject: [PATCH RFC PKS/PMEM 58/58] [dax|pmem]: Enable stray access protection Date: Fri, 9 Oct 2020 12:50:33 -0700 Message-Id: <20201009195033.3208459-59-ira.weiny@intel.com> X-Mailer: git-send-email 2.28.0.rc0.12.gb6a658bd00c9 In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ira Weiny Protecting against stray writes is particularly important for PMEM because, unlike writes to anonymous memory, writes to PMEM persists across a reboot. Thus data corruption could result in permanent loss of data. While stray writes are more serious than reads, protection is also enabled for reads. This helps to detect bugs in code which would incorrectly access device memory and prevents a more serious machine checks should those bug reads from a poison page. Enable stray access protection by setting the flag in pgmap which requests it. There is no option presented to the user. If Zone Device Access Protection not be supported this flag will have no affect. Signed-off-by: Ira Weiny --- drivers/dax/device.c | 2 ++ drivers/nvdimm/pmem.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/dax/device.c b/drivers/dax/device.c index 1e89513f3c59..e6fb35b4f0fb 100644 --- a/drivers/dax/device.c +++ b/drivers/dax/device.c @@ -430,6 +430,8 @@ int dev_dax_probe(struct device *dev) } dev_dax->pgmap.type = MEMORY_DEVICE_GENERIC; + dev_dax->pgmap.flags |= PGMAP_PROT_ENABLED; + addr = devm_memremap_pages(dev, &dev_dax->pgmap); if (IS_ERR(addr)) return PTR_ERR(addr); diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index e4dc1ae990fc..9fcd8338e23f 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -426,6 +426,8 @@ static int pmem_attach_disk(struct device *dev, return -EBUSY; } + pmem->pgmap.flags |= PGMAP_PROT_ENABLED; + q = blk_alloc_queue(dev_to_node(dev)); if (!q) return -ENOMEM;