From patchwork Mon Mar 2 11:00:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Shi X-Patchwork-Id: 11415269 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 0008A109A for ; Mon, 2 Mar 2020 11:01:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BE69A2468E for ; Mon, 2 Mar 2020 11:01:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BE69A2468E 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 421526B0007; Mon, 2 Mar 2020 06:01:05 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 3D28D6B0008; Mon, 2 Mar 2020 06:01:05 -0500 (EST) 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 2991B6B000A; Mon, 2 Mar 2020 06:01:05 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0241.hostedemail.com [216.40.44.241]) by kanga.kvack.org (Postfix) with ESMTP id 11BDB6B0007 for ; Mon, 2 Mar 2020 06:01:05 -0500 (EST) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id E620C180AD801 for ; Mon, 2 Mar 2020 11:01:04 +0000 (UTC) X-FDA: 76550130048.15.hill95_7dadf3cf53b1d X-Spam-Summary: 2,0,0,7244f262e4918ed3,d41d8cd98f00b204,alex.shi@linux.alibaba.com,,RULES_HIT:41:69:355:379:541:800:960:973:988:989:1260:1261:1345:1359:1431:1437:1535:1544:1711:1730:1747:1777:1792:2393:2559:2562:2693:2898:3138:3139:3140:3141:3142:3355:3867:3868:4117:4321:4605:5007:6261:6737:7514:7903:8603:8957:10004:11026:11232:11473:11638:11639:11658:11914:12043:12048:12296:12297:12438:12555:12895:13846:14096:14181:14394:14721:14915:21060:21080:21451:21627:21740:21987:21990:30054:30070,0,RBL:115.124.30.45:@linux.alibaba.com:.lbl8.mailshell.net-62.20.2.100 64.201.201.201,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: hill95_7dadf3cf53b1d X-Filterd-Recvd-Size: 6434 Received: from out30-45.freemail.mail.aliyun.com (out30-45.freemail.mail.aliyun.com [115.124.30.45]) by imf07.hostedemail.com (Postfix) with ESMTP for ; Mon, 2 Mar 2020 11:01:03 +0000 (UTC) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R531e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01f04396;MF=alex.shi@linux.alibaba.com;NM=1;PH=DS;RN=16;SR=0;TI=SMTPD_---0TrQxdI3_1583146856; Received: from localhost(mailfrom:alex.shi@linux.alibaba.com fp:SMTPD_---0TrQxdI3_1583146856) by smtp.aliyun-inc.com(127.0.0.1); Mon, 02 Mar 2020 19:00:56 +0800 From: Alex Shi To: cgroups@vger.kernel.org, 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 Cc: Alex Shi , Michal Hocko , Vladimir Davydov , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v9 07/20] mm/lru: introduce TestClearPageLRU Date: Mon, 2 Mar 2020 19:00:17 +0800 Message-Id: <1583146830-169516-8-git-send-email-alex.shi@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1583146830-169516-1-git-send-email-alex.shi@linux.alibaba.com> References: <1583146830-169516-1-git-send-email-alex.shi@linux.alibaba.com> 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: Combined PageLRU check and ClearPageLRU into one function by new introduced func TestClearPageLRU. This function will be used as page isolation precondition. No functional change yet. 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/memcontrol.c | 4 ++-- mm/mlock.c | 3 +-- mm/swap.c | 8 ++------ mm/vmscan.c | 19 +++++++++---------- 5 files changed, 15 insertions(+), 20 deletions(-) diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 1bf83c8fcaa7..5cb155f3191e 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -318,6 +318,7 @@ 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/memcontrol.c b/mm/memcontrol.c index 875e2aebcde7..f8419f3436a8 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2588,9 +2588,8 @@ static void commit_charge(struct page *page, struct mem_cgroup *memcg, pgdat = page_pgdat(page); spin_lock_irq(&pgdat->lru_lock); - if (PageLRU(page)) { + if (TestClearPageLRU(page)) { lruvec = mem_cgroup_page_lruvec(page, pgdat); - ClearPageLRU(page); del_page_from_lru_list(page, lruvec, page_lru(page)); } else spin_unlock_irq(&pgdat->lru_lock); @@ -2613,6 +2612,7 @@ static void commit_charge(struct page *page, struct mem_cgroup *memcg, if (lrucare && lruvec) { lruvec = mem_cgroup_page_lruvec(page, pgdat); + VM_BUG_ON_PAGE(PageLRU(page), page); SetPageLRU(page); add_page_to_lru_list(page, lruvec, page_lru(page)); diff --git a/mm/mlock.c b/mm/mlock.c index a72c1eeded77..03b3a5d99ad7 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 1ac24fc35d6b..8e71bdd04a1a 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -59,15 +59,13 @@ */ 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); } @@ -831,7 +829,7 @@ 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) { @@ -844,8 +842,6 @@ 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 dcdd33f65f43..8958454d50fe 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1751,21 +1751,20 @@ 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; }