From patchwork Sun Jul 14 23:34:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Minchan Kim X-Patchwork-Id: 11043309 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E833F13BD for ; Sun, 14 Jul 2019 23:34:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D7CDB26E73 for ; Sun, 14 Jul 2019 23:34:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CC14A26E78; Sun, 14 Jul 2019 23:34:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1561326E73 for ; Sun, 14 Jul 2019 23:34:40 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id F3CF06B000D; Sun, 14 Jul 2019 19:34:38 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id EE6856B000E; Sun, 14 Jul 2019 19:34:38 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DB5896B0010; Sun, 14 Jul 2019 19:34:38 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from mail-pg1-f200.google.com (mail-pg1-f200.google.com [209.85.215.200]) by kanga.kvack.org (Postfix) with ESMTP id A5B8B6B000D for ; Sun, 14 Jul 2019 19:34:38 -0400 (EDT) Received: by mail-pg1-f200.google.com with SMTP id p29so1376404pgm.10 for ; Sun, 14 Jul 2019 16:34:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:dkim-signature:sender:from:to:cc:subject:date :message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=KfEiOXyW4kuzduZtxistAHn9ZpsA2gWKadebZDAjUeQ=; b=IpdAVV9pPdu5KNH7Zp5C6kyC8YV7JYZDu/Jv6OSwvNKZnEvaNcKnFFKZ4GYlXRdi8Y 9oq+jx/r3m5P5sBLQes/VLY3fwRXn1nMpmnPhSnNjJFW7ba3KX1zMekZ1Rr/BlkU7fL3 ZqMrnSTERfFTKGps7+KFWKddryPNxo6dcHdUI9cUk3tGlBX6qDiwJZgP4jWzhUEQD1Sw lwqVXPeGt95S52GLbNgx0PpivTY7ZdhVXYgr7xGmeESPmlw7P4QC1VjnsYPo1NRmvgZe inRReEp26oWDwt75rCBnJQVK+rtTofIGU6cfALPAbVyT7zOaiZPc6ZNAcutZOHrnMDm9 ODrw== X-Gm-Message-State: APjAAAWciX0Gx/WzOMN+Jxsly/qOFjqZ1zTBnE6E3ueqHy/PkTH65pZm omI4mTNYilUiwON5+IATsAnhaWhwGwM/zWwytm92ynAbOGr63FChuCWZoRsRW3P8vmgv5qnuajV BQHoJNgPcB5eSMtFSMqb09RMQVhXMe7Omc+bQC97sIqNZl+0OdgPuEh7legSx6zY= X-Received: by 2002:a17:90a:8c0c:: with SMTP id a12mr25894647pjo.67.1563147278355; Sun, 14 Jul 2019 16:34:38 -0700 (PDT) X-Received: by 2002:a17:90a:8c0c:: with SMTP id a12mr25894603pjo.67.1563147277558; Sun, 14 Jul 2019 16:34:37 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1563147277; cv=none; d=google.com; s=arc-20160816; b=Ot4JY3SovF3VHHUXh2RqC8Af82F0uUaXkTsuuP317Rfj6JQngtq6QL1XHMpVwsbcr1 xoxX3Q13aE6NB7ieY1mHv/kY85y595H+RlpVuUUoHPNDEozMgJrvobyRkg0HY/Y/Prpw 3T2+6xuf3AY/fxc5m4S4y7wCgmreDyqn+GH0yJLgpVZhl2/6NML1Pkw/h/WUzofgpMST t4TlJpMKp8a4aIJfILIG9Fjy997rXAoS0B3On1tOuqtr93jziOEdXq4bqM/zMvmo9G1T u8Tl8l4p+D7E4BrKZke4NYHC+wKME7UzjT6UR+6NQcTwfxHc+P1jsqQVy0Fkd764p5q/ rxsA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:dkim-signature; bh=KfEiOXyW4kuzduZtxistAHn9ZpsA2gWKadebZDAjUeQ=; b=PpABCUd5vPK48KVoaQgzURb0hce2MU9GHIOC2DCbRKhuAAUwYs6nrkxy7aO/fkYRF7 P5mXWKI9A2RbwqbxSPCZz30uHEh35GnyDYdTh8PhMeH0cCxp9CJ8FqXIo7ja60u2B5+z EbLS3TpT7T16kCR2bSfEuevMkb+pDmkmOo/Hs692W5+mUcZ7TZw2mfDrHzDWU71X6DrF eLtoP2dMN2x0xGdE6HEpN04dHYAejGVdtDYKVOZkWGPhLEyUvWpRGw2NBartIOrrMnNk XG8UI5lCX59meNimDfbET1u/WftCo+Sfw+VXGcgURFOYi09Sy+EWXUP7ZdX6Sp4d11Z0 hT9A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=rf4itW1I; spf=pass (google.com: domain of minchan.kim@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=minchan.kim@gmail.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id d2sor8389774pfn.15.2019.07.14.16.34.37 for (Google Transport Security); Sun, 14 Jul 2019 16:34:37 -0700 (PDT) Received-SPF: pass (google.com: domain of minchan.kim@gmail.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=rf4itW1I; spf=pass (google.com: domain of minchan.kim@gmail.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=minchan.kim@gmail.com; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=KfEiOXyW4kuzduZtxistAHn9ZpsA2gWKadebZDAjUeQ=; b=rf4itW1IsHxAFs9MxOB0TmnKsP3+cBK+3y0QWniCdN9fc36+7Wn17VNe/511cQywEj nwKt2XJoD9k9jweT3ijg2UwqWMp2UBUFM4wr4WdcfgixPwrvVcbyA+zeUlatwyJkYjHt FUKsEjRrldB2OmI3pHGg1pppPkGN7ok9C95b8NeDAELf2N+g/ai3UfPtG4mWQlLktgxF QlmWAdn/h767jcyQ665JXOHeko34GAqkIPVR9ztFU2XnY+W46OlbWMMMppaNG+vuqfiy +4o/1VI8cvBCCFy12b0GDdum4qatHpezBIrd518V1f0JgdnySCEMnFJEktvngZ1dsbLK Oj9A== X-Google-Smtp-Source: APXvYqzC7RBZaMwY5bYAkeGQmgM4AZYBlT/9oSZ7xWAe4a7ZbX2ktJRZOUhtUi1xyjHDdH3K4Bjarg== X-Received: by 2002:a63:f04:: with SMTP id e4mr23148786pgl.38.1563147277064; Sun, 14 Jul 2019 16:34:37 -0700 (PDT) Received: from bbox-2.seo.corp.google.com ([2401:fa00:d:0:98f1:8b3d:1f37:3e8]) by smtp.gmail.com with ESMTPSA id n26sm16256923pfa.83.2019.07.14.16.34.31 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 14 Jul 2019 16:34:35 -0700 (PDT) From: Minchan Kim To: Andrew Morton Cc: linux-mm , LKML , linux-api@vger.kernel.org, Michal Hocko , Johannes Weiner , Tim Murray , Joel Fernandes , Suren Baghdasaryan , Daniel Colascione , Shakeel Butt , Sonny Rao , oleksandr@redhat.com, hdanton@sina.com, lizeb@google.com, Dave Hansen , "Kirill A . Shutemov" , Minchan Kim Subject: [PATCH v5 5/5] mm: factor out common parts between MADV_COLD and MADV_PAGEOUT Date: Mon, 15 Jul 2019 08:34:00 +0900 Message-Id: <20190714233401.36909-6-minchan@kernel.org> X-Mailer: git-send-email 2.22.0.510.g264f2c817a-goog In-Reply-To: <20190714233401.36909-1-minchan@kernel.org> References: <20190714233401.36909-1-minchan@kernel.org> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: X-Virus-Scanned: ClamAV using ClamSMTP There are many common parts between MADV_COLD and MADV_PAGEOUT. This patch factor them out to save code duplication. Acked-by: Michal Hocko Signed-off-by: Minchan Kim --- mm/madvise.c | 193 ++++++++++++--------------------------------------- 1 file changed, 46 insertions(+), 147 deletions(-) diff --git a/mm/madvise.c b/mm/madvise.c index 8db102f170ef..693239a8f67b 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -30,6 +30,11 @@ #include "internal.h" +struct madvise_walk_private { + struct mmu_gather *tlb; + bool pageout; +}; + /* * Any behaviour which results in changes to the vma->vm_flags needs to * take mmap_sem for writing. Others, which simply traverse vmas, need @@ -310,16 +315,23 @@ static long madvise_willneed(struct vm_area_struct *vma, return 0; } -static int madvise_cold_pte_range(pmd_t *pmd, unsigned long addr, - unsigned long end, struct mm_walk *walk) +static int madvise_cold_or_pageout_pte_range(pmd_t *pmd, + unsigned long addr, unsigned long end, + struct mm_walk *walk) { - struct mmu_gather *tlb = walk->private; + struct madvise_walk_private *private = walk->private; + struct mmu_gather *tlb = private->tlb; + bool pageout = private->pageout; struct mm_struct *mm = tlb->mm; struct vm_area_struct *vma = walk->vma; pte_t *orig_pte, *pte, ptent; spinlock_t *ptl; - struct page *page; unsigned long next; + struct page *page = NULL; + LIST_HEAD(page_list); + + if (fatal_signal_pending(current)) + return -EINTR; next = pmd_addr_end(addr, end); if (pmd_trans_huge(*pmd)) { @@ -366,10 +378,17 @@ static int madvise_cold_pte_range(pmd_t *pmd, unsigned long addr, tlb_remove_pmd_tlb_entry(tlb, pmd, addr); } + ClearPageReferenced(page); test_and_clear_page_young(page); - deactivate_page(page); + if (pageout) { + if (!isolate_lru_page(page)) + list_add(&page->lru, &page_list); + } else + deactivate_page(page); huge_unlock: spin_unlock(ptl); + if (pageout) + reclaim_pages(&page_list); return 0; } @@ -437,12 +456,19 @@ static int madvise_cold_pte_range(pmd_t *pmd, unsigned long addr, * As a side effect, it makes confuse idle-page tracking * because they will miss recent referenced history. */ + ClearPageReferenced(page); test_and_clear_page_young(page); - deactivate_page(page); + if (pageout) { + if (!isolate_lru_page(page)) + list_add(&page->lru, &page_list); + } else + deactivate_page(page); } arch_enter_lazy_mmu_mode(); pte_unmap_unlock(orig_pte, ptl); + if (pageout) + reclaim_pages(&page_list); cond_resched(); return 0; @@ -452,10 +478,15 @@ static void madvise_cold_page_range(struct mmu_gather *tlb, struct vm_area_struct *vma, unsigned long addr, unsigned long end) { + struct madvise_walk_private walk_private = { + .tlb = tlb, + .pageout = false, + }; + struct mm_walk cold_walk = { - .pmd_entry = madvise_cold_pte_range, + .pmd_entry = madvise_cold_or_pageout_pte_range, .mm = vma->vm_mm, - .private = tlb, + .private = &walk_private, }; tlb_start_vma(tlb, vma); @@ -482,151 +513,19 @@ static long madvise_cold(struct vm_area_struct *vma, return 0; } -static int madvise_pageout_pte_range(pmd_t *pmd, unsigned long addr, - unsigned long end, struct mm_walk *walk) -{ - struct mmu_gather *tlb = walk->private; - struct mm_struct *mm = tlb->mm; - struct vm_area_struct *vma = walk->vma; - pte_t *orig_pte, *pte, ptent; - spinlock_t *ptl; - LIST_HEAD(page_list); - struct page *page; - unsigned long next; - - if (fatal_signal_pending(current)) - return -EINTR; - - next = pmd_addr_end(addr, end); - if (pmd_trans_huge(*pmd)) { - pmd_t orig_pmd; - - tlb_change_page_size(tlb, HPAGE_PMD_SIZE); - ptl = pmd_trans_huge_lock(pmd, vma); - if (!ptl) - return 0; - - orig_pmd = *pmd; - if (is_huge_zero_pmd(orig_pmd)) - goto huge_unlock; - - if (unlikely(!pmd_present(orig_pmd))) { - VM_BUG_ON(thp_migration_supported() && - !is_pmd_migration_entry(orig_pmd)); - goto huge_unlock; - } - - page = pmd_page(orig_pmd); - if (next - addr != HPAGE_PMD_SIZE) { - int err; - - if (page_mapcount(page) != 1) - goto huge_unlock; - get_page(page); - spin_unlock(ptl); - lock_page(page); - err = split_huge_page(page); - unlock_page(page); - put_page(page); - if (!err) - goto regular_page; - return 0; - } - - if (pmd_young(orig_pmd)) { - pmdp_invalidate(vma, addr, pmd); - orig_pmd = pmd_mkold(orig_pmd); - - set_pmd_at(mm, addr, pmd, orig_pmd); - tlb_remove_tlb_entry(tlb, pmd, addr); - } - - ClearPageReferenced(page); - test_and_clear_page_young(page); - - if (!isolate_lru_page(page)) - list_add(&page->lru, &page_list); -huge_unlock: - spin_unlock(ptl); - reclaim_pages(&page_list); - return 0; - } - - if (pmd_trans_unstable(pmd)) - return 0; -regular_page: - tlb_change_page_size(tlb, PAGE_SIZE); - orig_pte = pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl); - flush_tlb_batched_pending(mm); - arch_enter_lazy_mmu_mode(); - for (; addr < end; pte++, addr += PAGE_SIZE) { - ptent = *pte; - if (!pte_present(ptent)) - continue; - - page = vm_normal_page(vma, addr, ptent); - if (!page) - continue; - - /* - * creating a THP page is expensive so split it only if we - * are sure it's worth. Split it if we are only owner. - */ - if (PageTransCompound(page)) { - if (page_mapcount(page) != 1) - break; - get_page(page); - if (!trylock_page(page)) { - put_page(page); - break; - } - pte_unmap_unlock(orig_pte, ptl); - if (split_huge_page(page)) { - unlock_page(page); - put_page(page); - pte_offset_map_lock(mm, pmd, addr, &ptl); - break; - } - unlock_page(page); - put_page(page); - pte = pte_offset_map_lock(mm, pmd, addr, &ptl); - pte--; - addr -= PAGE_SIZE; - continue; - } - - VM_BUG_ON_PAGE(PageTransCompound(page), page); - - if (pte_young(ptent)) { - ptent = ptep_get_and_clear_full(mm, addr, pte, - tlb->fullmm); - ptent = pte_mkold(ptent); - set_pte_at(mm, addr, pte, ptent); - tlb_remove_tlb_entry(tlb, pte, addr); - } - ClearPageReferenced(page); - test_and_clear_page_young(page); - - if (!isolate_lru_page(page)) - list_add(&page->lru, &page_list); - } - - arch_leave_lazy_mmu_mode(); - pte_unmap_unlock(orig_pte, ptl); - reclaim_pages(&page_list); - cond_resched(); - - return 0; -} - static void madvise_pageout_page_range(struct mmu_gather *tlb, struct vm_area_struct *vma, unsigned long addr, unsigned long end) { + struct madvise_walk_private walk_private = { + .pageout = true, + .tlb = tlb, + }; + struct mm_walk pageout_walk = { - .pmd_entry = madvise_pageout_pte_range, + .pmd_entry = madvise_cold_or_pageout_pte_range, .mm = vma->vm_mm, - .private = tlb, + .private = &walk_private, }; tlb_start_vma(tlb, vma);