From mboxrd@z Thu Jan 1 00:00:00 1970 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 832CCC433E0 for ; Mon, 25 Jan 2021 20:45:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 47AA221D79 for ; Mon, 25 Jan 2021 20:45:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732260AbhAYUpQ (ORCPT ); Mon, 25 Jan 2021 15:45:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58202 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732114AbhAYTui (ORCPT ); Mon, 25 Jan 2021 14:50:38 -0500 Received: from mail-qt1-x831.google.com (mail-qt1-x831.google.com [IPv6:2607:f8b0:4864:20::831]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A20AC0617AA for ; Mon, 25 Jan 2021 11:48:02 -0800 (PST) Received: by mail-qt1-x831.google.com with SMTP id r9so10565805qtp.11 for ; Mon, 25 Jan 2021 11:48:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=soleen.com; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=erDKiXAtt/ZfDNNFCFxfMe9eST86O7VxkIZqpHHCdMo=; b=gXzBEYM45h44JmTh+SOS1KqJ1znNfWJdkHIooP65qs8VDI0rCPGi5a6NwsG4j/pCNh /2/dc+XTJVBSZrZCNDbuwaGzREMMmuImcnaeIEbB+Q02AmkENedC7dJkYmFjnqVp+Myv DHV05lsECVIBoPoj5Vso7Cfy4F9qn/Jl9/+Kfo/Td4bLGSjaGbivdep/zGt7PiizKxbR gstHnSIHGaFghCA2orssPKJIZ4UdhRzPKHjSS85B3h5LpTQ/Fj1sFh2m0eCI1sdpOOJG BeeMpZ92z2aU8mtDFN3zjna36X77bHpBNPnq1mLUSe0IcOM7v7LCaye3DaZPNqFvcs2y G0ZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=erDKiXAtt/ZfDNNFCFxfMe9eST86O7VxkIZqpHHCdMo=; b=sTeTH4RL69wjeXSDWVJHTyU7dx7w0wnGy/zcjwFKrj2LIhVs+f/fydO7ypT2eIKSfs 891PMd19hSPNPbPqoqJi2Zo6+s/BFlhER1ToJ7ovPw1q7Y3W6gRZMMIzqZjaO69eugDw OJeYxa1WN8OaCU/DyMYbW15w1DaAh+Z3KD0ZynlkNgsS8LduNNjkEcotkWXEj1ooahFc OeCJP+YxorMpoEjT2XIT3C8Oy4r3z1zwkv1E1nOPniM4RDWgpS+I48qW19mb7MRlHMDf 4hEpHsixX1s91zcCIoKDvt6ASvWogjEm+BkplvnTbuYLGrNrmdvzPFmyzltD4uJKgtLf lgqA== X-Gm-Message-State: AOAM533k6ag1q44Cc9VYqENijwlglc3Tnyrq7hNRTQXBiy/YX+7pAvdT UZr0SMawtltwoG17vXLE53ml3Q== X-Google-Smtp-Source: ABdhPJwbOUzBr/56M0RmyAQ+ZsDl4fcJihGJYA2TsdytVsQeYtM4XvDXE+uslGEnRTypRVtMn1fUjw== X-Received: by 2002:aed:3661:: with SMTP id e88mr2018577qtb.243.1611604081880; Mon, 25 Jan 2021 11:48:01 -0800 (PST) Received: from localhost.localdomain (c-73-69-118-222.hsd1.nh.comcast.net. [73.69.118.222]) by smtp.gmail.com with ESMTPSA id c12sm12121569qtq.76.2021.01.25.11.48.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Jan 2021 11:48:01 -0800 (PST) From: Pavel Tatashin To: pasha.tatashin@soleen.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@linux-foundation.org, vbabka@suse.cz, mhocko@suse.com, david@redhat.com, osalvador@suse.de, dan.j.williams@intel.com, sashal@kernel.org, tyhicks@linux.microsoft.com, iamjoonsoo.kim@lge.com, mike.kravetz@oracle.com, rostedt@goodmis.org, mingo@redhat.com, jgg@ziepe.ca, peterz@infradead.org, mgorman@suse.de, willy@infradead.org, rientjes@google.com, jhubbard@nvidia.com, linux-doc@vger.kernel.org, ira.weiny@intel.com, linux-kselftest@vger.kernel.org, jmorris@namei.org Subject: [PATCH v8 05/14] mm cma: rename PF_MEMALLOC_NOCMA to PF_MEMALLOC_PIN Date: Mon, 25 Jan 2021 14:47:42 -0500 Message-Id: <20210125194751.1275316-6-pasha.tatashin@soleen.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210125194751.1275316-1-pasha.tatashin@soleen.com> References: <20210125194751.1275316-1-pasha.tatashin@soleen.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PF_MEMALLOC_NOCMA is used ot guarantee that the allocator will not return pages that might belong to CMA region. This is currently used for long term gup to make sure that such pins are not going to be done on any CMA pages. When PF_MEMALLOC_NOCMA has been introduced we haven't realized that it is focusing on CMA pages too much and that there is larger class of pages that need the same treatment. MOVABLE zone cannot contain any long term pins as well so it makes sense to reuse and redefine this flag for that usecase as well. Rename the flag to PF_MEMALLOC_PIN which defines an allocation context which can only get pages suitable for long-term pins. Also re-name: memalloc_nocma_save()/memalloc_nocma_restore to memalloc_pin_save()/memalloc_pin_restore() and make the new functions common. Signed-off-by: Pavel Tatashin Reviewed-by: John Hubbard Acked-by: Michal Hocko --- include/linux/sched.h | 2 +- include/linux/sched/mm.h | 21 +++++---------------- mm/gup.c | 4 ++-- mm/hugetlb.c | 4 ++-- mm/page_alloc.c | 4 ++-- 5 files changed, 12 insertions(+), 23 deletions(-) diff --git a/include/linux/sched.h b/include/linux/sched.h index e47a3823f408..f90a27611926 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1576,7 +1576,7 @@ extern struct pid *cad_pid; #define PF_SWAPWRITE 0x00800000 /* Allowed to write to swap */ #define PF_NO_SETAFFINITY 0x04000000 /* Userland is not allowed to meddle with cpus_mask */ #define PF_MCE_EARLY 0x08000000 /* Early kill for mce process policy */ -#define PF_MEMALLOC_NOCMA 0x10000000 /* All allocation request will have _GFP_MOVABLE cleared */ +#define PF_MEMALLOC_PIN 0x10000000 /* Allocation context constrained to zones which allow long term pinning. */ #define PF_FREEZER_SKIP 0x40000000 /* Freezer should not count it as freezable */ #define PF_SUSPEND_TASK 0x80000000 /* This thread called freeze_processes() and should not be frozen */ diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index 1ae08b8462a4..5f4dd3274734 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -270,29 +270,18 @@ static inline void memalloc_noreclaim_restore(unsigned int flags) current->flags = (current->flags & ~PF_MEMALLOC) | flags; } -#ifdef CONFIG_CMA -static inline unsigned int memalloc_nocma_save(void) +static inline unsigned int memalloc_pin_save(void) { - unsigned int flags = current->flags & PF_MEMALLOC_NOCMA; + unsigned int flags = current->flags & PF_MEMALLOC_PIN; - current->flags |= PF_MEMALLOC_NOCMA; + current->flags |= PF_MEMALLOC_PIN; return flags; } -static inline void memalloc_nocma_restore(unsigned int flags) +static inline void memalloc_pin_restore(unsigned int flags) { - current->flags = (current->flags & ~PF_MEMALLOC_NOCMA) | flags; + current->flags = (current->flags & ~PF_MEMALLOC_PIN) | flags; } -#else -static inline unsigned int memalloc_nocma_save(void) -{ - return 0; -} - -static inline void memalloc_nocma_restore(unsigned int flags) -{ -} -#endif #ifdef CONFIG_MEMCG DECLARE_PER_CPU(struct mem_cgroup *, int_active_memcg); diff --git a/mm/gup.c b/mm/gup.c index 7ecca2d66dff..857b273e32ac 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -1669,7 +1669,7 @@ static long __gup_longterm_locked(struct mm_struct *mm, long rc; if (gup_flags & FOLL_LONGTERM) - flags = memalloc_nocma_save(); + flags = memalloc_pin_save(); rc = __get_user_pages_locked(mm, start, nr_pages, pages, vmas, NULL, gup_flags); @@ -1678,7 +1678,7 @@ static long __gup_longterm_locked(struct mm_struct *mm, if (rc > 0) rc = check_and_migrate_cma_pages(mm, start, rc, pages, vmas, gup_flags); - memalloc_nocma_restore(flags); + memalloc_pin_restore(flags); } return rc; } diff --git a/mm/hugetlb.c b/mm/hugetlb.c index a6bad1f686c5..2d79e515a7a3 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1049,10 +1049,10 @@ static void enqueue_huge_page(struct hstate *h, struct page *page) static struct page *dequeue_huge_page_node_exact(struct hstate *h, int nid) { struct page *page; - bool nocma = !!(current->flags & PF_MEMALLOC_NOCMA); + bool pin = !!(current->flags & PF_MEMALLOC_PIN); list_for_each_entry(page, &h->hugepage_freelists[nid], lru) { - if (nocma && is_migrate_cma_page(page)) + if (pin && is_migrate_cma_page(page)) continue; if (PageHWPoison(page)) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index b031a5ae0bd5..f92d7c810953 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -3813,8 +3813,8 @@ static inline unsigned int current_alloc_flags(gfp_t gfp_mask, #ifdef CONFIG_CMA unsigned int pflags = current->flags; - if (!(pflags & PF_MEMALLOC_NOCMA) && - gfp_migratetype(gfp_mask) == MIGRATE_MOVABLE) + if (!(pflags & PF_MEMALLOC_PIN) && + gfp_migratetype(gfp_mask) == MIGRATE_MOVABLE) alloc_flags |= ALLOC_CMA; #endif -- 2.25.1