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=-2.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 497C5C4338F for ; Sun, 22 Aug 2021 10:06:15 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BE907601FA for ; Sun, 22 Aug 2021 10:06:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org BE907601FA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 1207D6B006C; Sun, 22 Aug 2021 06:06:14 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0D0736B0072; Sun, 22 Aug 2021 06:06:14 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F01058D0001; Sun, 22 Aug 2021 06:06:13 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0164.hostedemail.com [216.40.44.164]) by kanga.kvack.org (Postfix) with ESMTP id D42FE6B006C for ; Sun, 22 Aug 2021 06:06:13 -0400 (EDT) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 6AAAC26DC4 for ; Sun, 22 Aug 2021 10:06:13 +0000 (UTC) X-FDA: 78502286226.24.55CBE16 Received: from mail-ej1-f42.google.com (mail-ej1-f42.google.com [209.85.218.42]) by imf21.hostedemail.com (Postfix) with ESMTP id 29E05D00EB3D for ; Sun, 22 Aug 2021 10:06:13 +0000 (UTC) Received: by mail-ej1-f42.google.com with SMTP id ia27so8000502ejc.10 for ; Sun, 22 Aug 2021 03:06:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=lDNBGIq+xGdVYw1TUBg1mZGiYyDFgWVG+GX+moPobUw=; b=czNcR77rw/X56j3Zar4Kopj/sUheukLLzJQWR+1pmlT99701iQkSSg0UgAVn0Y9+iY ylQLwbDLvKww8h65MzXNUl7vU72Njq70cP9MPI5Ebg+3ZWgMOj+7mXct1RhyLdtjvMRK AUgCmab2SKk7y+BtB614dhhP0ehHirc9NiSMlqtX4cJyM33u3F6dsCCx+1rX8QYQFLtE U/FjAXG/VhwnTeFyjZTq0O1icCvLC6RRAkXfolLTIZovp/bG5NPvE+XEXqskkNg3Jfc6 EBtNJxdBcGw5oMxCgqkK+Jx4q4Yh3Y6/zNR51GOPYKGhXr9VJf1D+jpUJm9wziX6x9OZ faWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=lDNBGIq+xGdVYw1TUBg1mZGiYyDFgWVG+GX+moPobUw=; b=pMgHQfNfTh4hQU03xWp8w0gnnHQ7PsXq6KBCkJ1c6xblBhTIcrBsL7/BFDVnTmgkGK 6Ejhs/sZltAHBkzRG9OK3H4ij6NUbqM83/9hUUPZgZV7FzystgvVvhr60Nx169Gzyo4a NmJbido/cVkckpfdWDE7cs9FRE07OnXvnkqBzW63OKAFBKX17yenBlGFBqshzPBO7SaN KCaWXLumGEypRjx3ZrJEY+RS0mn1+uA72PI/Tewf4pPawaqUxpLUYND9OOmh1Plzxs18 +g9YxEHvyTusJheHj0eiyGtq0Gc01pOa5XzQ50ICi+nOIqoUW7WTNED2HdTJbLkoL7J4 6hKQ== X-Gm-Message-State: AOAM531EOcY7JiNvdghmGFFDxf60HgUiqCbuxmDNK5OQBL6Aon1ilbeu PLheV3LvDEIotjUmoeBwRvH7GO9TtUuxpgrUERM= X-Google-Smtp-Source: ABdhPJwM28Y6tOVIUwHzDZsMLViJQBLmV74+c9NknAMPcnKlC5q+2TlV9KJm7u5imxL5BSM3d3X2G4Umy6NFLpLDdX4= X-Received: by 2002:a17:906:93e8:: with SMTP id yl8mr3892304ejb.524.1629626771746; Sun, 22 Aug 2021 03:06:11 -0700 (PDT) MIME-Version: 1.0 References: <1629417219-74853-1-git-send-email-wang.yong12@zte.com.cn> In-Reply-To: From: yong w Date: Sun, 22 Aug 2021 18:06:00 +0800 Message-ID: Subject: Re: [PATCH v2] mm: Add configuration to control whether vmpressure notifier is enabled To: Shakeel Butt Cc: Tejun Heo , Jonathan Corbet , Andrew Morton , Michal Hocko , Vladimir Davydov , Thomas Gleixner , "Peter Zijlstra (Intel)" , Roman Gushchin , alexs@kernel.org, Wei Yang , Hui Su , Stephen Rothwell , wang.yong12@zte.com.cn, Cgroups , linux-doc@vger.kernel.org, LKML , Linux MM , yang.yang29@zte.com.cn, wangyong Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=gmail.com header.s=20161025 header.b=czNcR77r; spf=pass (imf21.hostedemail.com: domain of yongwpur@gmail.com designates 209.85.218.42 as permitted sender) smtp.mailfrom=yongwpur@gmail.com; dmarc=pass (policy=none) header.from=gmail.com X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 29E05D00EB3D X-Stat-Signature: xkp6wuoogweitj6d6oodyknwb75ohk7g X-HE-Tag: 1629626773-256696 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: Hello, I find the code of socket pressure and vmpressure are related. And there are two ways to be discussed 1. The calculation of socket pressure is handed over to the psi. 2. Vmpresssure and psi update socket pressure respectively, and are configured separately. Thanks. yong w =E4=BA=8E2021=E5=B9=B48=E6=9C=8820=E6=97=A5=E5= =91=A8=E4=BA=94 =E4=B8=8B=E5=8D=8810:29=E5=86=99=E9=81=93=EF=BC=9A > > Shakeel Butt =E4=BA=8E2021=E5=B9=B48=E6=9C=8820=E6= =97=A5=E5=91=A8=E4=BA=94 =E4=B8=8B=E5=8D=887:42=E5=86=99=E9=81=93=EF=BC=9A > > > > On Thu, Aug 19, 2021 at 4:54 PM wrote: > > > > > > From: wangyong > > > > > > Inspired by PSI features, vmpressure inotifier function should > > > also be configured to decide whether it is used, because it is an > > > independent feature which notifies the user of memory pressure. > > > > > > > It is also used by the networking stack to check memory pressure. See > > mem_cgroup_under_socket_pressure(). > > Thanks for your replly, mem_cgroup_under_socket_pressure does use vmpres= sue, > I'll check it.