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=-9.9 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1,USER_IN_DEF_DKIM_WL autolearn=no 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 3DC18C33CAB for ; Mon, 13 Jan 2020 08:48:29 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 021E12082E for ; Mon, 13 Jan 2020 08:48:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="kEhY48/M" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 021E12082E Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9A8748E0006; Mon, 13 Jan 2020 03:48:28 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 959B48E0001; Mon, 13 Jan 2020 03:48:28 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 86F8A8E0006; Mon, 13 Jan 2020 03:48:28 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0097.hostedemail.com [216.40.44.97]) by kanga.kvack.org (Postfix) with ESMTP id 712178E0001 for ; Mon, 13 Jan 2020 03:48:28 -0500 (EST) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id 13A1E4DC8 for ; Mon, 13 Jan 2020 08:48:28 +0000 (UTC) X-FDA: 76371984696.07.fog26_2cc3be9ed4149 X-HE-Tag: fog26_2cc3be9ed4149 X-Filterd-Recvd-Size: 5633 Received: from mail-oi1-f194.google.com (mail-oi1-f194.google.com [209.85.167.194]) by imf48.hostedemail.com (Postfix) with ESMTP for ; Mon, 13 Jan 2020 08:48:27 +0000 (UTC) Received: by mail-oi1-f194.google.com with SMTP id a67so7529442oib.6 for ; Mon, 13 Jan 2020 00:48:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:in-reply-to:message-id:references :user-agent:mime-version; bh=WZ/Vp5J75l/Z0Fz+dAhAJFvPAQAZ19P0lPgX+P8DE2c=; b=kEhY48/M0ggWwX4MEp67wWDacjjM2wtpVF6VdfR+QTa89pYS1Ttsf2zhsO8+rAUU6z nbOC/tzJ7vvPxgnf9hcmvu4/CpYXaqm+jest6X7tewjKCfUhoIsPnKpvMaAYphzImzb3 QMSQYIkrXk95BmJ1me8KmozT7h4bu25C/qD6qjVtdBIz3J8fCDJMnquBwx0dPFkEUi49 LAkoO8wjIPqvgDTcDa6SCty/lMoV7Z9BZ64d/h8EexOUrv9unhFGEg8rxKLv3T+CUoIl Lxa/6cd0OwlV5Cqciuy5rYZXpeQu45NJicfJBAplLaiYsZL97KT4EWcZOdy52FmI2ydI rMKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:in-reply-to:message-id :references:user-agent:mime-version; bh=WZ/Vp5J75l/Z0Fz+dAhAJFvPAQAZ19P0lPgX+P8DE2c=; b=nbSTZOhORngIZ4OcjcUsvN3y7C70b+5mPUigtfN0Sx2hPbi6fn3vQLq9F6GvCDk/QZ F/i0prZTAuY4BBWATlEcwefPek3iuzl/yDq//xjammuUxWHNwpizNz3PrrT0i1mCjVLP om0PW0ydPykj5LJ63qne4mWl9VR8SopZFYScO8GjsZqFODpxZVGGHv89h0P5kmq823G+ fdck7SRSYmLf4hvXlACryHXvJazBJXilHFz6X6t3nrBH5R72MAUAfnP6TcC4H6hcdIr6 UgUtfBGU677BYOjWVXWkehHIZrdnGtzHG1DNKuJUTTC3r8jTIz/PT1edUIWABAlC3+66 b4Qg== X-Gm-Message-State: APjAAAU6ceKtj6mPNAthavUKN0RIx7p1lx3qVhDUx+4gn2gfeaSGU79P ymguNpZ+PmXVBylT2qB2YNviMg== X-Google-Smtp-Source: APXvYqxMQhw3Z5zgpWJ+2DIL+uOUDya8Vn39qFQYSWRl1BI5LUX2DqO/ktpcDtBkOE16BMvbiG3qCA== X-Received: by 2002:aca:1a10:: with SMTP id a16mr12108681oia.9.1578905306366; Mon, 13 Jan 2020 00:48:26 -0800 (PST) Received: from eggly.attlocal.net (172-10-233-147.lightspeed.sntcca.sbcglobal.net. [172.10.233.147]) by smtp.gmail.com with ESMTPSA id h9sm3286549oie.53.2020.01.13.00.48.24 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 13 Jan 2020 00:48:25 -0800 (PST) Date: Mon, 13 Jan 2020 00:48:12 -0800 (PST) From: Hugh Dickins X-X-Sender: hugh@eggly.anvils To: Alex Shi cc: hannes@cmpxchg.org, Andrew Morton , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.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 Subject: Re: [PATCH v7 00/10] per lruvec lru_lock for memcg In-Reply-To: Message-ID: References: <1577264666-246071-1-git-send-email-alex.shi@linux.alibaba.com> <20191231150514.61c2b8c8354320f09b09f377@linux-foundation.org> <944f0f6a-466a-7ce3-524c-f6db86fd0891@linux.alibaba.com> User-Agent: Alpine 2.11 (LSU 23 2013-08-11) MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="0-817818044-1578905305=:1103" 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: This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --0-817818044-1578905305=:1103 Content-Type: TEXT/PLAIN; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE On Fri, 10 Jan 2020, Alex Shi wrote: > =E5=9C=A8 2020/1/2 =E4=B8=8B=E5=8D=886:21, Alex Shi =E5=86=99=E9=81=93: > > =E5=9C=A8 2020/1/1 =E4=B8=8A=E5=8D=887:05, Andrew Morton =E5=86=99=E9= =81=93: > >> On Wed, 25 Dec 2019 17:04:16 +0800 Alex Shi wrote: > >> > >>> This patchset move lru_lock into lruvec, give a lru_lock for each of > >>> lruvec, thus bring a lru_lock for each of memcg per node. > >> > >> I see that there has been plenty of feedback on previous versions, but > >> no acked/reviewed tags as yet. > >> > >> I think I'll take a pass for now, see what the audience feedback looks > >> like ;) > >> > >=20 >=20 > Hi Johannes, >=20 > Any comments of this version? :) I (Hugh) tried to test it on v5.5-rc5, but did not get very far at all - perhaps because my particular interest tends towards tmpfs and swap, and swap always made trouble for lruvec lock - one of the reasons why our patches were more complicated than you thought necessary. Booted a smallish kernel in mem=3D700M with 1.5G of swap, with intention of running small kernel builds in tmpfs and in ext4-on-loop-on-tmpfs (losetup was the last command started but I doubt it played much part): mount -t tmpfs -o size=3D470M tmpfs /tst cp /dev/zero /tst losetup /dev/loop0 /tst/zero and kernel crashed on the VM_BUG_ON_PAGE(lruvec_memcg(lruvec) !=3D page->mem_cgroup, page); kernel BUG at mm/memcontrol.c:1268! lock_page_lruvec_irqsave relock_page_lruvec_irqsave pagevec_lru_move_fn __pagevec_lru_add lru_add_drain_cpu lru_add_drain swap_cluster_readahead shmem_swapin shmem_swapin_page shmem_getpage_gfp shmem_getpage shmem_write_begin generic_perform_write __generic_file_write_iter generic_file_write_iter new_sync_write __vfs_write vfs_write ksys_write __x86_sys_write do_syscall_64 Hugh --0-817818044-1578905305=:1103--