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=-7.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=ham 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 1C080C3A59F for ; Mon, 26 Aug 2019 14:25:46 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DAF63217F5 for ; Mon, 26 Aug 2019 14:25:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DAF63217F5 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 40B1E6B0594; Mon, 26 Aug 2019 10:25:45 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3BD176B0595; Mon, 26 Aug 2019 10:25:45 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2ABDC6B0596; Mon, 26 Aug 2019 10:25:45 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0059.hostedemail.com [216.40.44.59]) by kanga.kvack.org (Postfix) with ESMTP id 0D44F6B0594 for ; Mon, 26 Aug 2019 10:25:45 -0400 (EDT) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id B375C2DFA for ; Mon, 26 Aug 2019 14:25:44 +0000 (UTC) X-FDA: 75864802608.18.bit22_4f262f1042e1c X-HE-Tag: bit22_4f262f1042e1c X-Filterd-Recvd-Size: 2440 Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) by imf48.hostedemail.com (Postfix) with ESMTP for ; Mon, 26 Aug 2019 14:25:43 +0000 (UTC) X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R681e4;CH=green;DM=||false|;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01f04391;MF=alex.shi@linux.alibaba.com;NM=1;PH=DS;RN=8;SR=0;TI=SMTPD_---0TaWxL0E_1566829535; Received: from IT-FVFX43SYHV2H.local(mailfrom:alex.shi@linux.alibaba.com fp:SMTPD_---0TaWxL0E_1566829535) by smtp.aliyun-inc.com(127.0.0.1); Mon, 26 Aug 2019 22:25:36 +0800 Subject: Re: [PATCH 00/14] per memcg lru_lock To: Daniel Jordan , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrew Morton , Mel Gorman , Tejun Heo , Michal Hocko References: <1566294517-86418-1-git-send-email-alex.shi@linux.alibaba.com> <6ba1ffb0-fce0-c590-c373-7cbc516dbebd@oracle.com> <348495d2-b558-fdfd-a411-89c75d4a9c78@linux.alibaba.com> From: Alex Shi Message-ID: <0f8e2bc0-96b4-f55a-51da-b53dac415dd7@linux.alibaba.com> Date: Mon, 26 Aug 2019 22:25:14 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable 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: =E5=9C=A8 2019/8/22 =E4=B8=8B=E5=8D=8811:20, Daniel Jordan =E5=86=99=E9=81= =93: >> >>> =C2=A0=C2=A0 https://git.kernel.org/pub/scm/linux/kernel/git/wfg/vm-s= calability.git/tree/case-lru-file-readtwice> >>> It's also synthetic but it stresses lru_lock more than just anon allo= c/free.=C2=A0 It hits the page activate path, which is where we see this = lock in our database, and if enough memory is configured lru_lock also ge= ts stressed during reclaim, similar to [1]. >> >> Thanks for the sharing, this patchset can not help the [1] case, since= it's just relief the per container lock contention now. >=20 > I should've been clearer.=C2=A0 [1] is meant as an example of someone s= uffering from lru_lock during reclaim.=C2=A0 Wouldn't your series help pe= r-memcg reclaim? yes, I got your point, since the aim9 don't show much improvement, I am t= rying this case in containers. Thanks Alex