From: David Rientjes <rientjes@google.com>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Michal Hocko <mhocko@suse.cz>,
linux-mm@kvack.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [patch] mm: memcg: do not declare OOM from __GFP_NOFAIL allocations
Date: Wed, 27 Nov 2013 13:38:59 -0800 (PST) [thread overview]
Message-ID: <alpine.DEB.2.02.1311271336220.9222@chino.kir.corp.google.com> (raw)
In-Reply-To: <20131127163916.GB3556@cmpxchg.org>
On Wed, 27 Nov 2013, Johannes Weiner wrote:
> > Ah, this is because of 3168ecbe1c04 ("mm: memcg: use proper memcg in limit
> > bypass") which just bypasses all of these allocations and charges the root
> > memcg. So if allocations want to bypass memcg isolation they just have to
> > be __GFP_NOFAIL?
>
> I don't think we have another option.
>
We don't give __GFP_NOFAIL allocations access to memory reserves in the
page allocator and we do call the oom killer for them so that a process is
killed so that memory is freed. Why do we have a different policy for
memcg?
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next prev parent reply other threads:[~2013-11-27 21:39 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-22 17:17 Johannes Weiner
2013-11-27 1:01 ` David Rientjes
2013-11-27 3:33 ` David Rientjes
2013-11-27 16:39 ` Johannes Weiner
2013-11-27 21:38 ` David Rientjes [this message]
2013-11-27 22:53 ` Johannes Weiner
2013-11-27 23:34 ` David Rientjes
2013-11-28 10:20 ` Michal Hocko
2013-11-29 23:46 ` David Rientjes
2013-12-02 13:22 ` Michal Hocko
2013-12-02 23:02 ` David Rientjes
2013-12-03 22:25 ` Johannes Weiner
2013-12-03 23:40 ` David Rientjes
2013-12-04 3:01 ` Johannes Weiner
2013-12-04 4:34 ` Dave Chinner
2013-12-04 5:25 ` Johannes Weiner
2013-12-04 6:10 ` David Rientjes
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