From: Johannes Weiner <hannes@cmpxchg.org>
To: David Rientjes <rientjes@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, Michal Hocko <mhocko@suse.com>,
Vladimir Davydov <vdavydov.dev@gmail.com>,
Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
Tejun Heo <tj@kernel.org>,
kernel-team@fb.com, cgroups@vger.kernel.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
Roman Gushchin <guro@fb.com>
Subject: Re: [RESEND v12 0/6] cgroup-aware OOM killer
Date: Thu, 26 Oct 2017 10:24:45 -0400 [thread overview]
Message-ID: <20171026142445.GA21147@cmpxchg.org> (raw)
In-Reply-To: <alpine.DEB.2.10.1710221715010.70210@chino.kir.corp.google.com>
On Sun, Oct 22, 2017 at 05:24:51PM -0700, David Rientjes wrote:
> On Thu, 19 Oct 2017, Johannes Weiner wrote:
>
> > David would have really liked for this patchset to include knobs to
> > influence how the algorithm picks cgroup victims. The rest of us
> > agreed that this is beyond the scope of these patches, that the
> > patches don't need it to be useful, and that there is nothing
> > preventing anyone from adding configurability later on. David
> > subsequently nacked the series as he considers it incomplete. Neither
> > Michal nor I see technical merit in David's nack.
> >
>
> The nack is for three reasons:
>
> (1) unfair comparison of root mem cgroup usage to bias against that mem
> cgroup from oom kill in system oom conditions,
>
> (2) the ability of users to completely evade the oom killer by attaching
> all processes to child cgroups either purposefully or unpurposefully,
> and
>
> (3) the inability of userspace to effectively control oom victim
> selection.
My apologies if my summary was too reductionist.
That being said, the arguments you repeat here have come up in
previous threads and been responded to. This doesn't change my
conclusion that your NAK is bogus.
next prev parent reply other threads:[~2017-10-26 14:25 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-19 18:52 [RESEND v12 0/6] cgroup-aware OOM killer Roman Gushchin
2017-10-19 18:52 ` [RESEND v12 1/6] mm, oom: refactor the oom_kill_process() function Roman Gushchin
2017-10-19 18:52 ` [RESEND v12 2/6] mm: implement mem_cgroup_scan_tasks() for the root memory cgroup Roman Gushchin
2017-10-19 18:52 ` [RESEND v12 3/6] mm, oom: cgroup-aware OOM killer Roman Gushchin
2017-10-19 19:30 ` Michal Hocko
2017-10-31 15:04 ` Shakeel Butt
2017-10-31 15:29 ` Michal Hocko
2017-10-31 19:06 ` Michal Hocko
2017-10-31 19:13 ` Michal Hocko
2017-10-31 16:40 ` Johannes Weiner
2017-10-31 17:50 ` Shakeel Butt
2017-10-31 18:44 ` Johannes Weiner
2017-10-19 18:52 ` [RESEND v12 4/6] mm, oom: introduce memory.oom_group Roman Gushchin
2017-10-19 18:52 ` [RESEND v12 5/6] mm, oom: add cgroup v2 mount option for cgroup-aware OOM killer Roman Gushchin
2017-10-19 18:52 ` [RESEND v12 6/6] mm, oom, docs: describe the " Roman Gushchin
2017-10-19 19:45 ` [RESEND v12 0/6] " Johannes Weiner
2017-10-19 21:09 ` Michal Hocko
2017-10-23 0:24 ` David Rientjes
2017-10-23 11:49 ` Michal Hocko
2017-10-25 20:12 ` David Rientjes
2017-10-26 14:24 ` Johannes Weiner [this message]
2017-10-26 21:03 ` David Rientjes
2017-10-27 9:31 ` Roman Gushchin
2017-10-30 21:36 ` David Rientjes
2017-10-31 7:54 ` Michal Hocko
2017-10-31 22:21 ` David Rientjes
2017-11-01 7:37 ` Michal Hocko
2017-11-01 20:42 ` David Rientjes
2017-10-27 20:05 ` Johannes Weiner
2017-10-31 14:17 ` peter enderborg
2017-10-31 14:34 ` Michal Hocko
2017-10-31 15:07 ` peter enderborg
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