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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 C673AC433E2 for ; Thu, 11 Jun 2020 06:17:36 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 935CA2075F for ; Thu, 11 Jun 2020 06:17:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 935CA2075F 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 2172E8D0083; Thu, 11 Jun 2020 02:17:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F20C18D0086; Thu, 11 Jun 2020 02:17:20 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D468B8D0083; Thu, 11 Jun 2020 02:17:20 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0130.hostedemail.com [216.40.44.130]) by kanga.kvack.org (Postfix) with ESMTP id B825A8D0084 for ; Thu, 11 Jun 2020 02:17:20 -0400 (EDT) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 806AD1EE6 for ; Thu, 11 Jun 2020 06:17:20 +0000 (UTC) X-FDA: 76915923840.16.value31_040c2d226dd1 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin16.hostedemail.com (Postfix) with ESMTP id 581C3100E690C for ; Thu, 11 Jun 2020 06:17:20 +0000 (UTC) X-HE-Tag: value31_040c2d226dd1 X-Filterd-Recvd-Size: 3852 Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) by imf12.hostedemail.com (Postfix) with ESMTP for ; Thu, 11 Jun 2020 06:17:18 +0000 (UTC) X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R191e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04407;MF=alex.shi@linux.alibaba.com;NM=1;PH=DS;RN=18;SR=0;TI=SMTPD_---0U.FIUmA_1591856231; Received: from localhost(mailfrom:alex.shi@linux.alibaba.com fp:SMTPD_---0U.FIUmA_1591856231) by smtp.aliyun-inc.com(127.0.0.1); Thu, 11 Jun 2020 14:17:11 +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: Andrey Ryabinin , Jann Horn Subject: [PATCH v12 14/16] mm/vmscan: use relock for move_pages_to_lru Date: Thu, 11 Jun 2020 14:16:47 +0800 Message-Id: <1591856209-166869-15-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: 581C3100E690C X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 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: From: Hugh Dickins Use the relock function to replace relocking action. And try to save few lock times. Signed-off-by: Hugh Dickins Signed-off-by: Alex Shi Cc: Andrew Morton Cc: Tejun Heo Cc: Andrey Ryabinin Cc: Jann Horn Cc: Mel Gorman Cc: Johannes Weiner Cc: Matthew Wilcox Cc: Hugh Dickins Cc: cgroups@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org --- mm/vmscan.c | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 1253cdb16c96..d763cb307e92 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1854,15 +1854,15 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec, enum lru_list lru; while (!list_empty(list)) { - struct lruvec *new_lruvec = NULL; - page = lru_to_page(list); VM_BUG_ON_PAGE(PageLRU(page), page); list_del(&page->lru); if (unlikely(!page_evictable(page))) { - spin_unlock_irq(&lruvec->lru_lock); + if (lruvec) { + spin_unlock_irq(&lruvec->lru_lock); + lruvec = NULL; + } putback_lru_page(page); - spin_lock_irq(&lruvec->lru_lock); continue; } @@ -1876,12 +1876,7 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec, * list_add(&page->lru,) * list_add(&page->lru,) //corrupt */ - new_lruvec = mem_cgroup_page_lruvec(page, page_pgdat(page)); - if (new_lruvec != lruvec) { - if (lruvec) - spin_unlock_irq(&lruvec->lru_lock); - lruvec = lock_page_lruvec_irq(page); - } + lruvec = relock_page_lruvec_irq(page, lruvec); SetPageLRU(page); if (unlikely(put_page_testzero(page))) { @@ -1890,8 +1885,8 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec, if (unlikely(PageCompound(page))) { spin_unlock_irq(&lruvec->lru_lock); + lruvec = NULL; destroy_compound_page(page); - spin_lock_irq(&lruvec->lru_lock); } else list_add(&page->lru, &pages_to_free); continue; -- 1.8.3.1