From patchwork Tue Nov 19 12:23:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alex Shi X-Patchwork-Id: 11251863 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 C16C0138C for ; Tue, 19 Nov 2019 12:25:26 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 989FA20730 for ; Tue, 19 Nov 2019 12:25:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 989FA20730 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 ACD3D6B000E; Tue, 19 Nov 2019 07:25:25 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id A2E536B0010; Tue, 19 Nov 2019 07:25:25 -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 8D06C6B0266; Tue, 19 Nov 2019 07:25:25 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0247.hostedemail.com [216.40.44.247]) by kanga.kvack.org (Postfix) with ESMTP id 6F1CE6B000E for ; Tue, 19 Nov 2019 07:25:25 -0500 (EST) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id 3E2672476 for ; Tue, 19 Nov 2019 12:25:25 +0000 (UTC) X-FDA: 76172947410.08.point25_2f38e4c155e2c X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,alex.shi@linux.alibaba.com,:cgroups@vger.kernel.org:linux-kernel@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:shakeelb@google.com:hannes@cmpxchg.org:alex.shi@linux.alibaba.com:mhocko@kernel.org:vdavydov.dev@gmail.com:guro@fb.com:chris@chrisdown.name:tglx@linutronix.de:vbabka@suse.cz:aryabinin@virtuozzo.com:swkhack@gmail.com:stefan.potyra@elektrobit.com:jgg@ziepe.ca:mchehab+samsung@kernel.org:peng.fan@nxp.com:nborisov@suse.com:ira.weiny@intel.com:ktkhai@virtuozzo.com:laoar.shao@gmail.com,RULES_HIT:30054:30064:30070,0,RBL:47.88.44.36:@linux.alibaba.com:.lbl8.mailshell.net-62.18.0.100 64.10.201.10;47.88.44.36-irl.urbl.hostedemail.com-127.0.0.175,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:25,LUA_SUMMARY:n one X-HE-Tag: point25_2f38e4c155e2c X-Filterd-Recvd-Size: 4730 Received: from out4436.biz.mail.alibaba.com (out4436.biz.mail.alibaba.com [47.88.44.36]) by imf45.hostedemail.com (Postfix) with ESMTP for ; Tue, 19 Nov 2019 12:25:24 +0000 (UTC) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R201e4;CH=green;DM=||false|;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04423;MF=alex.shi@linux.alibaba.com;NM=1;PH=DS;RN=30;SR=0;TI=SMTPD_---0TiZ7z35_1574166246; Received: from localhost(mailfrom:alex.shi@linux.alibaba.com fp:SMTPD_---0TiZ7z35_1574166246) by smtp.aliyun-inc.com(127.0.0.1); Tue, 19 Nov 2019 20:24:07 +0800 From: Alex Shi To: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.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, shakeelb@google.com, hannes@cmpxchg.org Cc: Alex Shi , Michal Hocko , Vladimir Davydov , Roman Gushchin , Chris Down , Thomas Gleixner , Vlastimil Babka , Andrey Ryabinin , swkhack , "Potyra, Stefan" , Jason Gunthorpe , Mauro Carvalho Chehab , Peng Fan , Nikolay Borisov , Ira Weiny , Kirill Tkhai , Yafang Shao Subject: [PATCH v4 5/9] mm/swap: only change the lru_lock iff page's lruvec is different Date: Tue, 19 Nov 2019 20:23:19 +0800 Message-Id: <1574166203-151975-6-git-send-email-alex.shi@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1574166203-151975-1-git-send-email-alex.shi@linux.alibaba.com> References: <1574166203-151975-1-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: Since we introduced relock_page_lruvec, we could use it in more place to reduce spin_locks. Signed-off-by: Alex Shi Cc: Johannes Weiner Cc: Michal Hocko Cc: Vladimir Davydov Cc: Andrew Morton Cc: Roman Gushchin Cc: Shakeel Butt Cc: Chris Down Cc: Thomas Gleixner Cc: Vlastimil Babka Cc: Andrey Ryabinin Cc: swkhack Cc: "Potyra, Stefan" Cc: Jason Gunthorpe Cc: Matthew Wilcox Cc: Mauro Carvalho Chehab Cc: Peng Fan Cc: Nikolay Borisov Cc: Ira Weiny Cc: Kirill Tkhai Cc: Yang Shi Cc: Yafang Shao Cc: Mel Gorman Cc: Konstantin Khlebnikov Cc: Hugh Dickins Cc: Tejun Heo Cc: linux-kernel@vger.kernel.org Cc: cgroups@vger.kernel.org Cc: linux-mm@kvack.org --- mm/swap.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/mm/swap.c b/mm/swap.c index 05fee145e382..a023e6095bd9 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -197,11 +197,12 @@ static void pagevec_lru_move_fn(struct pagevec *pvec, for (i = 0; i < pagevec_count(pvec); i++) { struct page *page = pvec->pages[i]; - lruvec = lock_page_lruvec_irqsave(page, page_pgdat(page), &flags); + lruvec = relock_page_lruvec_irqsave(page, lruvec, &flags); (*move_fn)(page, lruvec, arg); - spin_unlock_irqrestore(&lruvec->lru_lock, flags); } + if (lruvec) + spin_unlock_irqrestore(&lruvec->lru_lock, flags); release_pages(pvec->pages, pvec->nr); pagevec_reinit(pvec); @@ -820,15 +821,12 @@ void release_pages(struct page **pages, int nr) } if (PageLRU(page)) { - struct lruvec *new_lruvec = mem_cgroup_page_lruvec(page, page_pgdat(page)); + struct lruvec *pre_lruvec = lruvec; - if (new_lruvec != lruvec) { - if (lruvec) - spin_unlock_irqrestore(&lruvec->lru_lock, flags); + lruvec = relock_page_lruvec_irqsave(page, lruvec, &flags); + if (pre_lruvec != lruvec) lock_batch = 0; - lruvec = lock_page_lruvec_irqsave(page, page_pgdat(page), &flags); - } VM_BUG_ON_PAGE(!PageLRU(page), page); __ClearPageLRU(page); del_page_from_lru_list(page, lruvec, page_off_lru(page));