From patchwork Thu Jun 11 06:16:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Shi X-Patchwork-Id: 11599269 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 28307912 for ; Thu, 11 Jun 2020 06:17:29 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id F20CF20812 for ; Thu, 11 Jun 2020 06:17:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F20CF20812 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 77BA88D0081; Thu, 11 Jun 2020 02:17:18 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 756828D007D; Thu, 11 Jun 2020 02:17:18 -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 5F4A78D0081; Thu, 11 Jun 2020 02:17:18 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0069.hostedemail.com [216.40.44.69]) by kanga.kvack.org (Postfix) with ESMTP id 442E08D007D for ; Thu, 11 Jun 2020 02:17:18 -0400 (EDT) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id EC1743573 for ; Thu, 11 Jun 2020 06:17:17 +0000 (UTC) X-FDA: 76915923714.30.help54_3a046ff26dd1 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin30.hostedemail.com (Postfix) with ESMTP id C5F5E180B3C83 for ; Thu, 11 Jun 2020 06:17:17 +0000 (UTC) X-Spam-Summary: 50,0,0,ce1ac9d2c37e2f1d,d41d8cd98f00b204,alex.shi@linux.alibaba.com,,RULES_HIT:2:41:69:355:379:541:800:960:967:968:973:988:989:1260:1261:1345:1359:1431:1437:1535:1605:1606:1730:1747:1777:1792:2393:2525:2553:2560:2563:2682:2685:2693:2859:2898:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3865:3867:3868:3872:3874:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4117:4250:4321:4605:5007:6261:6737:7514:7903:8603:8957:9010:9025:9592:10004:11026:11232:11473:11638:11639:11658:11914:12043:12048:12296:12297:12438:12555:12895:12986:13161:13229:13845:13846:14096:14394:14915:21060:21080:21451:21627:21740:21788:21809:21987:21990:30054:30064:30070:30090,0,RBL:115.124.30.132:@linux.alibaba.com:.lbl8.mailshell.net-64.201.201.201 62.20.2.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: help54_3a046ff26dd1 X-Filterd-Recvd-Size: 6844 Received: from out30-132.freemail.mail.aliyun.com (out30-132.freemail.mail.aliyun.com [115.124.30.132]) by imf18.hostedemail.com (Postfix) with ESMTP for ; Thu, 11 Jun 2020 06:17:15 +0000 (UTC) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R661e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04426;MF=alex.shi@linux.alibaba.com;NM=1;PH=DS;RN=18;SR=0;TI=SMTPD_---0U.EtHpx_1591856228; Received: from localhost(mailfrom:alex.shi@linux.alibaba.com fp:SMTPD_---0U.EtHpx_1591856228) by smtp.aliyun-inc.com(127.0.0.1); Thu, 11 Jun 2020 14:17:09 +0800 From: Alex Shi To: akpm@linux-foundation.org, mgorman@techsingularity.net, tj@kernel.org, hughd@google.com, khlebnikov@yandex-team.ru, daniel.m.jordan@oracle.com, yang.shi@linux.alibaba.com, willy@infradead.org, hannes@cmpxchg.org, lkp@intel.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, shakeelb@google.com, iamjoonsoo.kim@lge.com, richard.weiyang@gmail.com Cc: Michal Hocko , Vladimir Davydov Subject: [PATCH v12 09/16] mm/lru: introduce TestClearPageLRU Date: Thu, 11 Jun 2020 14:16:42 +0800 Message-Id: <1591856209-166869-10-git-send-email-alex.shi@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1591856209-166869-1-git-send-email-alex.shi@linux.alibaba.com> References: <1591856209-166869-1-git-send-email-alex.shi@linux.alibaba.com> X-Rspamd-Queue-Id: C5F5E180B3C83 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 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: Combine PageLRU check and ClearPageLRU into a function by new introduced func TestClearPageLRU. This function will be used as page isolation precondition to prevent other isolations some where else. Then there are may non PageLRU page on lru list, need to remove BUG checking accordingly. As Andrew Morton mentioned this change would dirty cacheline for page isn't on LRU. But the lost would be acceptable with Rong Chen report: https://lkml.org/lkml/2020/3/4/173 Suggested-by: Johannes Weiner Signed-off-by: Alex Shi Cc: Johannes Weiner Cc: Michal Hocko Cc: Vladimir Davydov Cc: Andrew Morton Cc: linux-kernel@vger.kernel.org Cc: cgroups@vger.kernel.org Cc: linux-mm@kvack.org --- include/linux/page-flags.h | 1 + mm/mlock.c | 3 +-- mm/swap.c | 8 ++------ mm/vmscan.c | 29 +++++++++++++---------------- 4 files changed, 17 insertions(+), 24 deletions(-) diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 6be1aa559b1e..9554ed1387dc 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -326,6 +326,7 @@ static inline void page_init_poison(struct page *page, size_t size) PAGEFLAG(Dirty, dirty, PF_HEAD) TESTSCFLAG(Dirty, dirty, PF_HEAD) __CLEARPAGEFLAG(Dirty, dirty, PF_HEAD) PAGEFLAG(LRU, lru, PF_HEAD) __CLEARPAGEFLAG(LRU, lru, PF_HEAD) + TESTCLEARFLAG(LRU, lru, PF_HEAD) PAGEFLAG(Active, active, PF_HEAD) __CLEARPAGEFLAG(Active, active, PF_HEAD) TESTCLEARFLAG(Active, active, PF_HEAD) PAGEFLAG(Workingset, workingset, PF_HEAD) diff --git a/mm/mlock.c b/mm/mlock.c index f8736136fad7..228ba5a8e0a5 100644 --- a/mm/mlock.c +++ b/mm/mlock.c @@ -108,13 +108,12 @@ void mlock_vma_page(struct page *page) */ static bool __munlock_isolate_lru_page(struct page *page, bool getpage) { - if (PageLRU(page)) { + if (TestClearPageLRU(page)) { struct lruvec *lruvec; lruvec = mem_cgroup_page_lruvec(page, page_pgdat(page)); if (getpage) get_page(page); - ClearPageLRU(page); del_page_from_lru_list(page, lruvec, page_lru(page)); return true; } diff --git a/mm/swap.c b/mm/swap.c index 41cc329aa842..d0516efdde47 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -78,15 +78,13 @@ static DEFINE_PER_CPU(struct lru_pvecs, lru_pvecs) = { */ static void __page_cache_release(struct page *page) { - if (PageLRU(page)) { + if (TestClearPageLRU(page)) { pg_data_t *pgdat = page_pgdat(page); struct lruvec *lruvec; unsigned long flags; spin_lock_irqsave(&pgdat->lru_lock, flags); lruvec = mem_cgroup_page_lruvec(page, pgdat); - VM_BUG_ON_PAGE(!PageLRU(page), page); - __ClearPageLRU(page); del_page_from_lru_list(page, lruvec, page_off_lru(page)); spin_unlock_irqrestore(&pgdat->lru_lock, flags); } @@ -881,7 +879,7 @@ void release_pages(struct page **pages, int nr) continue; } - if (PageLRU(page)) { + if (TestClearPageLRU(page)) { struct pglist_data *pgdat = page_pgdat(page); if (pgdat != locked_pgdat) { @@ -894,8 +892,6 @@ void release_pages(struct page **pages, int nr) } lruvec = mem_cgroup_page_lruvec(page, locked_pgdat); - VM_BUG_ON_PAGE(!PageLRU(page), page); - __ClearPageLRU(page); del_page_from_lru_list(page, lruvec, page_off_lru(page)); } diff --git a/mm/vmscan.c b/mm/vmscan.c index 81228334f7d6..08910ca9fa40 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1547,16 +1547,16 @@ int __isolate_lru_page(struct page *page, isolate_mode_t mode) { int ret = -EINVAL; - /* Only take pages on the LRU. */ - if (!PageLRU(page)) - return ret; - /* Compaction should not handle unevictable pages but CMA can do so */ if (PageUnevictable(page) && !(mode & ISOLATE_UNEVICTABLE)) return ret; ret = -EBUSY; + /* Only take pages on the LRU. */ + if (!PageLRU(page)) + return ret; + /* * To minimise LRU disruption, the caller can indicate that it only * wants to isolate pages it will be able to operate on without @@ -1670,8 +1670,6 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan, page = lru_to_page(src); prefetchw_prev_lru_page(page, src, flags); - VM_BUG_ON_PAGE(!PageLRU(page), page); - nr_pages = compound_nr(page); total_scan += nr_pages; @@ -1768,21 +1766,20 @@ int isolate_lru_page(struct page *page) VM_BUG_ON_PAGE(!page_count(page), page); WARN_RATELIMIT(PageTail(page), "trying to isolate tail page"); - if (PageLRU(page)) { + get_page(page); + if (TestClearPageLRU(page)) { pg_data_t *pgdat = page_pgdat(page); struct lruvec *lruvec; + int lru = page_lru(page); - spin_lock_irq(&pgdat->lru_lock); lruvec = mem_cgroup_page_lruvec(page, pgdat); - if (PageLRU(page)) { - int lru = page_lru(page); - get_page(page); - ClearPageLRU(page); - del_page_from_lru_list(page, lruvec, lru); - ret = 0; - } + spin_lock_irq(&pgdat->lru_lock); + del_page_from_lru_list(page, lruvec, lru); spin_unlock_irq(&pgdat->lru_lock); - } + ret = 0; + } else + put_page(page); + return ret; }