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bh=SceSQ4zWov1ruMmU/Cx4LOSHMhOduLnCnMnnkM+gdgY=; b=Y/jTuZgZkRwDo3u6JvpxWmxiCzQ7i4pV50tHTktLt3Lv9PdTcSOmis4LHFLFclwTIcdd0f kPaux3bQGkvZRGxRDTM/8fMPG716dlC2ra5uhmQXUryrL9B93z2EHqhu0OH/x35juMIVqe 83doSlhUIabdsyiPq/nkMFbIId+D7rA= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id F01A0138E0; Fri, 9 Dec 2022 12:27:15 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 5mIYOqMpk2NkTQAAMHmgww (envelope-from ); Fri, 09 Dec 2022 12:27:15 +0000 Date: Fri, 9 Dec 2022 13:27:15 +0100 From: Michal Hocko To: =?utf-8?B?56iL5Z6y5rab?= Chengkaitao Cheng Cc: chengkaitao , "tj@kernel.org" , "lizefan.x@bytedance.com" , "hannes@cmpxchg.org" , "corbet@lwn.net" , "roman.gushchin@linux.dev" , "shakeelb@google.com" , "akpm@linux-foundation.org" , "songmuchun@bytedance.com" , "viro@zeniv.linux.org.uk" , "zhengqi.arch@bytedance.com" , "ebiederm@xmission.com" , "Liam.Howlett@oracle.com" , "chengzhihao1@huawei.com" , "haolee.swjtu@gmail.com" , "yuzhao@google.com" , "willy@infradead.org" , "vasily.averin@linux.dev" , "vbabka@suse.cz" , "surenb@google.com" , "sfr@canb.auug.org.au" , "mcgrof@kernel.org" , "sujiaxun@uniontech.com" , "feng.tang@intel.com" , "cgroups@vger.kernel.org" , "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "linux-mm@kvack.org" Subject: Re: [PATCH v2] mm: memcontrol: protect the memory in cgroup from being oom killed Message-ID: References: <114DF8F0-3E68-4F2B-8E35-0943EC2F51AE@didiglobal.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspamd-Queue-Id: BE9AF12000D X-Stat-Signature: qcjh9tyk1rkrbsb8thmqdktqjikkmr6d X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1670588837-629853 X-HE-Meta: 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 luGdpglI MG61W 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: On Fri 09-12-22 09:25:38, Michal Hocko wrote: > On Fri 09-12-22 05:07:15, 程垲涛 Chengkaitao Cheng wrote: [...] > > Here is a simple example. In a docker container, users can divide all processes > > into two categories (important and normal), and put them in different cgroups. > > One cgroup's oom.protect is set to "max", the other is set to "0". In this way, > > important processes in the container can be protected. > > That is effectivelly oom_score_adj = OOM_SCORE_ADJ_MIN - 1 to all Sorry that should have been OOM_SCORE_ADJ_MIN + 1 -- Michal Hocko SUSE Labs