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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 D699FC2D0D2 for ; Fri, 20 Dec 2019 07:13:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AC14624683 for ; Fri, 20 Dec 2019 07:13:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576826018; bh=asblTKSwJQla1GlpN4lSu52KJ12DcIMzvwmFapZOCJw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=UvCavkqPBVqLWf8IxhsDy7/MT3M8ue+oaEL2jtvKZV/rAQkcdi6uE3CJaUPHs4Qor Sf6ZBeKBAEDpyRELAoXVvwtgTuPHVIcNXnvscUfHqtIxVGN6OwaNL65f6HmT2ZyKU5 3c6v4LYaAfUJWzsQ837pXs2jI7oQ9Z7O7/vOLzDo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727333AbfLTHNh (ORCPT ); Fri, 20 Dec 2019 02:13:37 -0500 Received: from mail-wr1-f66.google.com ([209.85.221.66]:45464 "EHLO mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726651AbfLTHNh (ORCPT ); Fri, 20 Dec 2019 02:13:37 -0500 Received: by mail-wr1-f66.google.com with SMTP id j42so8309245wrj.12; 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=QkGVKx++/WV6H4PtmjKdkwN4r8XbhV9bLtp6el9zG87BCvk5DoWsjDhTEFV5beMA8m LlOvVMuzWcxKCQv55Gv0rx9sYHQC6bpIZtfhTtBoFaEzRpcAKXg73PpNUbH+lNmpJOeL Z/eB//GPeKU/fuXX6XOod/hyCb1wzssu21pH6byoydZQm0hmA9PygZOoBRVjfP3oHuc3 nubRBDhGb4CQtGpoEc948GLFBb6ZOI0UfYM5IfUicJho+FQrDZVdJPC0gJDYLxboZkz+ P0ZrFAOofGhKbALH81zsPwjn1RyOguKxLCDZEtxudLFl8vlRoTJnGh1EoXTLsR7Gvh5J w+6g== X-Gm-Message-State: APjAAAXxQkJ2Bb4F2HNrer0N+buuIof3L4PqFiYjfg9dIDz7EfBJldkR eAIBN3t0y03IGFcUBpeOkXGdF83n 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) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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