From: Rik van Riel <riel@redhat.com>
To: Minchan Kim <minchan.kim@gmail.com>
Cc: caiqian@redhat.com, linux-mm <linux-mm@kvack.org>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
"M. Vefa Bicakci" <bicave@superonline.com>,
Johannes Weiner <hannes@cmpxchg.org>,
stable@kernel.org, akpm@linux-foundation.org
Subject: Re: cgroup oom regression introduced by 6a5ce1b94e1e5979f8db579f77d6e08a5f44c13b
Date: Mon, 20 Sep 2010 09:13:37 -0400 [thread overview]
Message-ID: <4C975E01.3070503@redhat.com> (raw)
In-Reply-To: <20100918152120.GA21343@barrios-desktop>
On 09/18/2010 11:21 AM, Minchan Kim wrote:
> When memory pressure in memcg is high, do_try_to_free_pages returns
> 0. It causes mem_cgroup_out_of_memory so that any process in mem group
> would be killed.
> But vmscan-check-all_unreclaimable-in-direct-reclaim-path.patch changed
> the old behavior. It returns 1 unconditionally regardless of considering
> global reclaim or memcg relcaim. It causes hang without triggering OOM
> in case of memcg direct reclaim.
>
> This patch fixes it.
>
> It's reported by caiqian@redhat.com.
> (Thanks. Totally, it's my fault.)
>
> Reported-by: caiqian@redhat.com
> Cc: KOSAKI Motohiro<kosaki.motohiro@jp.fujitsu.com>
> Cc: Johannes Weiner<hannes@cmpxchg.org>
> Cc: Rik van Riel<riel@redhat.com>
> Cc: KAMEZAWA Hiroyuki<kamezawa.hiroyu@jp.fujitsu.com>
> Cc: Balbir Singh<balbir@in.ibm.com>
> Signed-off-by: Minchan Kim<minchan.kim@gmail.com>
Acked-by: Rik van Riel <riel@redhat.com>
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next prev parent reply other threads:[~2010-09-20 13:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1296415999.1298271284814035815.JavaMail.root@zmail06.collab.prod.int.phx2.redhat.com>
2010-09-18 12:52 ` cgroup oom regression introduced by 6a5ce1b94e1e5979f8db579f77d6e08a5f44c13b caiqian
2010-09-18 15:21 ` Minchan Kim
2010-09-20 8:01 ` CAI Qian
2010-09-20 13:13 ` Rik van Riel [this message]
2010-09-21 0:06 ` KAMEZAWA Hiroyuki
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