linux-kernel - Re: [v8 0/4] cgroup-aware OOM killer

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Date:   Mon, 2 Oct 2017 13:24:25 -0700
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Tim Hockin <thockin@...kin.org>, Roman Gushchin <guro@...com>,
        Johannes Weiner <hannes@...xchg.org>,
        Tejun Heo <tj@...nel.org>, kernel-team@...com,
        David Rientjes <rientjes@...gle.com>,
        Linux MM <linux-mm@...ck.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Cgroups <cgroups@...r.kernel.org>, linux-doc@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [v8 0/4] cgroup-aware OOM killer

On Mon, Oct 2, 2017 at 12:56 PM, Michal Hocko <mhocko@...nel.org> wrote:
> On Mon 02-10-17 12:45:18, Shakeel Butt wrote:
>> > I am sorry to cut the rest of your proposal because it simply goes over
>> > the scope of the proposed solution while the usecase you are mentioning
>> > is still possible. If we want to compare intermediate nodes (which seems
>> > to be the case) then we can always provide a knob to opt-in - be it your
>> > oom_gang or others.
>>
>> In the Roman's proposed solution we can already force the comparison
>> of intermediate nodes using 'oom_group', I am just requesting to
>> separate the killall semantics from it.
>
> oom_group _is_ about killall semantic.  And comparing killable entities
> is just a natural thing to do. So I am not sure what you mean
>

I am saying decouple the notion of comparable entities and killable entities.