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Date:   Fri, 1 Dec 2017 14:31:45 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Roman Gushchin <guro@...com>
Cc:     linux-mm@...r.kernel.org,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        David Rientjes <rientjes@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Tejun Heo <tj@...nel.org>, kernel-team@...com,
        cgroups@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v13 5/7] mm, oom: add cgroup v2 mount option for
 cgroup-aware OOM killer

On Fri 01-12-17 13:15:38, Roman Gushchin wrote:
[...]
> So, maybe we just need to return -EAGAIN (or may be -ENOTSUP) on any read/write
> attempt if option is not enabled?

Yes, that would work as well. ENOTSUP sounds better to me.
-- 
Michal Hocko
SUSE Labs

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