linux-kernel - Re: [patch -mm 3/4] mm, memcg: replace memory.oom

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Message-ID: <20180125081134.GL28465@dhcp22.suse.cz>
Date:   Thu, 25 Jan 2018 09:11:34 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     David Rientjes <rientjes@...gle.com>, Tejun Heo <tj@...nel.org>,
        Roman Gushchin <guro@...com>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        kernel-team@...com, cgroups@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [patch -mm 3/4] mm, memcg: replace memory.oom_group with policy
 tunable

On Wed 24-01-18 14:08:05, Andrew Morton wrote:
[...]
> Can we please try to narrow the scope of this issue by concentrating on
> the userspace interfaces?  David believes that the mount option and
> memory.oom_group will disappear again in the near future, others
> disagree.

Mount option is the cgroups maintainers call. And they seemed to be OK
with it.
I've tried to explain that oom_group is something that is semantically
sane and something we want to support because there are workloads which
simply do not work properly when only a subset is torn down. As such it
is not an API hazard AFAICS.
-- 
Michal Hocko
SUSE Labs