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=-2.5 required=3.0 tests=MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 C1568C43603 for ; Fri, 20 Dec 2019 07:13:38 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 7167B24679 for ; Fri, 20 Dec 2019 07:13:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7167B24679 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D3A578E018F; Fri, 20 Dec 2019 02:13:37 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id CEA588E0184; Fri, 20 Dec 2019 02:13:37 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BFFBA8E018F; Fri, 20 Dec 2019 02:13:37 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0064.hostedemail.com [216.40.44.64]) by kanga.kvack.org (Postfix) with ESMTP id AE7218E0184 for ; Fri, 20 Dec 2019 02:13:37 -0500 (EST) Received: from smtpin01.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 415F4181AEF09 for ; Fri, 20 Dec 2019 07:13:37 +0000 (UTC) X-FDA: 76284654474.01.alarm92_27543c8c945c X-HE-Tag: alarm92_27543c8c945c X-Filterd-Recvd-Size: 2973 Received: from mail-wr1-f67.google.com (mail-wr1-f67.google.com [209.85.221.67]) by imf37.hostedemail.com (Postfix) with ESMTP for ; Fri, 20 Dec 2019 07:13:36 +0000 (UTC) Received: by mail-wr1-f67.google.com with SMTP id c9so8340341wrw.8 for ; Thu, 19 Dec 2019 23:13:36 -0800 (PST) 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:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=FOQzWpHfx4pdEUl4NggtZJqU0xFxHqL/b5XZR3ZC39E=; b=m/fiX/1uLS/XknOBzb7qhaDDQpcQa461EvGA6d1CbYeGX22SOPAIIyATQ9I8vfhfjs xUPhQQaJCxbLRR+vJFSInOIgtOK3f9tZW/Jy1dwbDh430cvkGhcJFBr5JVN8j39tqVei h0A1gypl54pOcLgZGfY0WKbcpEOExq2yKniUEkcXTdUZIddXDBEkxY4JzmnPZNQnQmng LVcCOfmsX3jIRvgKh5rWKAgbc/ogpVZEb89SI/Oeo6O6d8qsk/Gpd3noBxXAiFLJ7fcY dlKCgF/P1NVWCkpCh3IfZ3b9QpjtCqmO0yv6Jz7rpaWCsw0uTFMKvKyvp7Ygqg7FU4JD Xt2Q== X-Gm-Message-State: APjAAAXNw8/I1SFc73c522B0srGF4BcyL5qVXOy2zzXmhRptc093caom wgIZdLwAxEMywW23omm8lR0= X-Google-Smtp-Source: APXvYqw7CXurc2quSgaz5A798GccKKbvTrl6mO4b61Y+BCiP1i/FuiRxu1BeUhnZUrnAQZU6IO1TwQ== X-Received: by 2002:adf:f7c4:: with SMTP id a4mr13025777wrq.332.1576826015587; Thu, 19 Dec 2019 23:13:35 -0800 (PST) Received: from localhost (ip-37-188-150-151.eurotel.cz. [37.188.150.151]) by smtp.gmail.com with ESMTPSA id g7sm8987211wrq.21.2019.12.19.23.13.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Dec 2019 23:13:34 -0800 (PST) Date: Fri, 20 Dec 2019 08:13:34 +0100 From: Michal Hocko To: zgpeng.linux@gmail.com Cc: akpm@linux-foundation.org, hannes@cmpxchg.org, vdavydov.dev@gmail.com, shakeelb@google.com, linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, zgpeng Subject: Re: [PATCH] oom: choose a more suitable process to kill while all processes are not killable Message-ID: <20191220071334.GB20332@dhcp22.suse.cz> References: <1576823172-25943-1-git-send-email-zgpeng.linux@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1576823172-25943-1-git-send-email-zgpeng.linux@gmail.com> User-Agent: Mutt/1.12.2 (2019-09-21) X-Bogosity: Ham, tests=bogofilter, spamicity=0.001093, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri 20-12-19 14:26:12, zgpeng.linux@gmail.com wrote: > From: zgpeng > > It has been found in multiple business scenarios that when a oom occurs > in a cgroup, the process that consumes the most memory in the cgroup is > not killed first. Analysis of the reasons found that each process in the > cgroup oom_score_adj is set to -998, oom_badness in the calculation of > points, if points is negative, uniformly set it to 1. Can you provide an example of the oom report? -- Michal Hocko SUSE Labs