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Message-ID: <Y5Mpo+X/rtr2D8Jr@dhcp22.suse.cz>
Date:   Fri, 9 Dec 2022 13:27:15 +0100
From:   Michal Hocko <mhocko@...e.com>
To:     程垲涛 Chengkaitao Cheng 
        <chengkaitao@...iglobal.com>
Cc:     chengkaitao <pilgrimtao@...il.com>,
        "tj@...nel.org" <tj@...nel.org>,
        "lizefan.x@...edance.com" <lizefan.x@...edance.com>,
        "hannes@...xchg.org" <hannes@...xchg.org>,
        "corbet@....net" <corbet@....net>,
        "roman.gushchin@...ux.dev" <roman.gushchin@...ux.dev>,
        "shakeelb@...gle.com" <shakeelb@...gle.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "songmuchun@...edance.com" <songmuchun@...edance.com>,
        "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
        "zhengqi.arch@...edance.com" <zhengqi.arch@...edance.com>,
        "ebiederm@...ssion.com" <ebiederm@...ssion.com>,
        "Liam.Howlett@...cle.com" <Liam.Howlett@...cle.com>,
        "chengzhihao1@...wei.com" <chengzhihao1@...wei.com>,
        "haolee.swjtu@...il.com" <haolee.swjtu@...il.com>,
        "yuzhao@...gle.com" <yuzhao@...gle.com>,
        "willy@...radead.org" <willy@...radead.org>,
        "vasily.averin@...ux.dev" <vasily.averin@...ux.dev>,
        "vbabka@...e.cz" <vbabka@...e.cz>,
        "surenb@...gle.com" <surenb@...gle.com>,
        "sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
        "mcgrof@...nel.org" <mcgrof@...nel.org>,
        "sujiaxun@...ontech.com" <sujiaxun@...ontech.com>,
        "feng.tang@...el.com" <feng.tang@...el.com>,
        "cgroups@...r.kernel.org" <cgroups@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH v2] mm: memcontrol: protect the memory in cgroup from
 being oom killed

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

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