linux-kernel - Re: [patch 1/2] mm, memcg: avoid oom notification when current needs access to memory reserves

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Message-Id: <20140109144757.e95616b4280c049b22743a15@linux-foundation.org>
Date:	Thu, 9 Jan 2014 14:47:57 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Michal Hocko <mhocko@...e.cz>,
	Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	cgroups@...r.kernel.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [patch 1/2] mm, memcg: avoid oom notification when current
 needs access to memory reserves

On Thu, 9 Jan 2014 13:34:24 -0800 (PST) David Rientjes <rientjes@...gle.com> wrote:

> On Tue, 7 Jan 2014, Andrew Morton wrote:
> 
> > I just spent a happy half hour reliving this thread and ended up
> > deciding I agreed with everyone!  I appears that many more emails are
> > needed so I think I'll drop
> > http://ozlabs.org/~akpm/mmots/broken-out/mm-memcg-avoid-oom-notification-when-current-needs-access-to-memory-reserves.patch
> > for now.
> > 
> > The claim that
> > mm-memcg-avoid-oom-notification-when-current-needs-access-to-memory-reserves.patch
> > will impact existing userspace seems a bit dubious to me.
> > 
> 
> I'm not sure why this was dropped since it's vitally needed for any sane 
> userspace oom handler to be effective.

It was dropped because the other memcg developers disagreed with it.

I'd really prefer not to have to spend a great amount of time parsing
argumentative and repetitive emails to make a tie-break decision which
may well be wrong anyway.

Please work with the other guys to find an acceptable implementation. 
There must be *something* we can do?
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