From: Stefan Ring <stefanrin@gmail.com>
To: Michal Hocko <mhocko@suse.cz>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
dchinner@redhat.com, oleg@redhat.com,
Linux fs XFS <xfs@oss.sgi.com>,
hannes@cmpxchg.org, linux-mm@kvack.org, mgorman@suse.de,
rientjes@google.com, linux-fsdevel@vger.kernel.org,
akpm@linux-foundation.org, fernando_b1@lab.ntt.co.jp,
torvalds@linux-foundation.org
Subject: Re: How to handle TIF_MEMDIE stalls?
Date: Fri, 20 Feb 2015 14:37:00 +0100 [thread overview]
Message-ID: <CAAxjCEzWJy4+VoJ51A46ioF7NJqumy+RtCRRHnSVN0_1=gi7yQ@mail.gmail.com> (raw)
In-Reply-To: <20150220091326.GD21248@dhcp22.suse.cz>
>> We don't know how many callers will pass __GFP_NOFAIL. But if 1000
>> threads are doing the same operation which requires __GFP_NOFAIL
>> allocation with a lock held, wouldn't memory reserves deplete?
>
> We shouldn't have an unbounded number of GFP_NOFAIL allocations at the
> same time. This would be even more broken. If a load is known to use
> such allocations excessively then the administrator can enlarge the
> memory reserves.
>
>> This heuristic can't continue if memory reserves depleted or
>> continuous pages of requested order cannot be found.
>
> Once memory reserves are depleted we are screwed anyway and we might
> panic.
This discussion reminds me of a situation I've seen somewhat
regularly, which I have described here:
http://oss.sgi.com/pipermail/xfs/2014-April/035793.html
I've actually seen it more often on another box with OpenVZ and
VirtualBox installed, where it would almost always happen during
startup of a VirtualBox guest machine. This other machine is also
running XFS. I blamed it on OpenVZ or VirtualBox originally, but
having seen the same thing happen on the other machine with neither of
them, the next candidate for taking blame is XFS.
Is this behavior something that can be attributed to these memory
allocation retry loops?
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next prev parent reply other threads:[~2015-02-20 13:37 UTC|newest]
Thread overview: 177+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-12 13:54 [RFC PATCH] oom: Don't count on mm-less current process Tetsuo Handa
2014-12-16 12:47 ` Michal Hocko
2014-12-17 11:54 ` Tetsuo Handa
2014-12-17 13:08 ` Michal Hocko
2014-12-18 12:11 ` Tetsuo Handa
2014-12-18 15:33 ` Michal Hocko
2014-12-19 12:07 ` Tetsuo Handa
2014-12-19 12:49 ` Michal Hocko
2014-12-20 9:13 ` Tetsuo Handa
2014-12-20 11:42 ` Tetsuo Handa
2014-12-22 20:25 ` Michal Hocko
2014-12-23 1:00 ` Tetsuo Handa
2014-12-23 9:51 ` Michal Hocko
2014-12-23 11:46 ` Tetsuo Handa
2014-12-23 11:57 ` Tetsuo Handa
2014-12-23 12:12 ` Tetsuo Handa
2014-12-23 12:27 ` Michal Hocko
2014-12-23 12:24 ` Michal Hocko
2014-12-23 13:00 ` Tetsuo Handa
2014-12-23 13:09 ` Michal Hocko
2014-12-23 13:20 ` Tetsuo Handa
2014-12-23 13:43 ` Michal Hocko
2014-12-23 14:11 ` Tetsuo Handa
2014-12-23 14:57 ` Michal Hocko
2014-12-19 12:22 ` How to handle TIF_MEMDIE stalls? Tetsuo Handa
2014-12-20 2:03 ` Dave Chinner
2014-12-20 12:41 ` Tetsuo Handa
2014-12-20 22:35 ` Dave Chinner
2014-12-21 8:45 ` Tetsuo Handa
2014-12-21 20:42 ` Dave Chinner
2014-12-22 16:57 ` Michal Hocko
2014-12-22 21:30 ` Dave Chinner
2014-12-23 9:41 ` Johannes Weiner
2014-12-24 1:06 ` Dave Chinner
2014-12-24 2:40 ` Linus Torvalds
2014-12-29 18:19 ` Michal Hocko
2014-12-30 6:42 ` Tetsuo Handa
2014-12-30 11:21 ` Michal Hocko
2014-12-30 13:33 ` Tetsuo Handa
2014-12-31 10:24 ` Tetsuo Handa
2015-02-09 11:44 ` Tetsuo Handa
2015-02-10 13:58 ` Tetsuo Handa
2015-02-10 15:19 ` Johannes Weiner
2015-02-11 2:23 ` Tetsuo Handa
2015-02-11 13:37 ` Tetsuo Handa
2015-02-11 18:50 ` Oleg Nesterov
2015-02-11 18:59 ` Oleg Nesterov
2015-03-14 13:03 ` Tetsuo Handa
2015-02-17 12:23 ` Tetsuo Handa
2015-02-17 12:53 ` Johannes Weiner
2015-02-17 15:38 ` Michal Hocko
2015-02-17 22:54 ` Dave Chinner
2015-02-17 23:32 ` Dave Chinner
2015-02-18 8:25 ` Michal Hocko
2015-02-18 10:48 ` Dave Chinner
2015-02-18 12:16 ` Michal Hocko
2015-02-18 21:31 ` Dave Chinner
2015-02-19 9:40 ` Michal Hocko
2015-02-19 22:03 ` Dave Chinner
2015-02-20 9:27 ` Michal Hocko
2015-02-19 11:01 ` Johannes Weiner
2015-02-19 12:29 ` Michal Hocko
2015-02-19 12:58 ` Michal Hocko
2015-02-19 15:29 ` Tetsuo Handa
2015-02-19 21:53 ` Tetsuo Handa
2015-02-20 9:13 ` Michal Hocko
2015-02-20 13:37 ` Stefan Ring [this message]
2015-02-19 13:29 ` Tetsuo Handa
2015-02-20 9:10 ` Michal Hocko
2015-02-20 12:20 ` Tetsuo Handa
2015-02-20 12:38 ` Michal Hocko
2015-02-19 21:43 ` Dave Chinner
2015-02-20 12:48 ` Michal Hocko
2015-02-20 23:09 ` Dave Chinner
2015-02-19 10:24 ` Johannes Weiner
2015-02-19 22:52 ` Dave Chinner
2015-02-20 10:36 ` Tetsuo Handa
2015-02-20 23:15 ` Dave Chinner
2015-02-21 3:20 ` Theodore Ts'o
2015-02-21 9:19 ` Andrew Morton
2015-02-21 13:48 ` Tetsuo Handa
2015-02-21 21:38 ` Dave Chinner
2015-02-22 0:20 ` Johannes Weiner
2015-02-23 10:48 ` Michal Hocko
2015-02-23 11:23 ` Tetsuo Handa
2015-02-23 21:33 ` David Rientjes
2015-02-22 14:48 ` __GFP_NOFAIL and oom_killer_disabled? Tetsuo Handa
2015-02-23 10:21 ` Michal Hocko
2015-02-23 13:03 ` Tetsuo Handa
2015-02-24 18:14 ` Michal Hocko
2015-02-25 11:22 ` Tetsuo Handa
2015-02-25 16:02 ` Michal Hocko
2015-02-25 21:48 ` Tetsuo Handa
2015-02-25 21:51 ` Andrew Morton
2015-02-21 12:00 ` How to handle TIF_MEMDIE stalls? Tetsuo Handa
2015-02-23 10:26 ` Michal Hocko
2015-02-21 11:12 ` Tetsuo Handa
2015-02-21 21:48 ` Dave Chinner
2015-02-21 23:52 ` Johannes Weiner
2015-02-23 0:45 ` Dave Chinner
2015-02-23 1:29 ` Andrew Morton
2015-02-23 7:32 ` Dave Chinner
2015-02-27 18:24 ` Vlastimil Babka
2015-02-28 0:03 ` Dave Chinner
2015-02-28 15:17 ` Theodore Ts'o
2015-03-02 9:39 ` Vlastimil Babka
2015-03-02 22:31 ` Dave Chinner
2015-03-03 9:13 ` Vlastimil Babka
2015-03-04 1:33 ` Dave Chinner
2015-03-04 8:50 ` Vlastimil Babka
2015-03-04 11:03 ` Dave Chinner
2015-03-07 0:20 ` Johannes Weiner
2015-03-07 3:43 ` Dave Chinner
2015-03-07 15:08 ` Johannes Weiner
2015-03-02 20:22 ` Johannes Weiner
2015-03-02 23:12 ` Dave Chinner
2015-03-03 2:50 ` Johannes Weiner
2015-03-04 6:52 ` Dave Chinner
2015-03-04 15:04 ` Johannes Weiner
2015-03-04 17:38 ` Theodore Ts'o
2015-03-04 23:17 ` Dave Chinner
2015-02-28 16:29 ` Johannes Weiner
2015-02-28 16:41 ` Theodore Ts'o
2015-02-28 22:15 ` Johannes Weiner
2015-03-01 11:17 ` Tetsuo Handa
2015-03-06 11:53 ` Tetsuo Handa
2015-03-01 13:43 ` Theodore Ts'o
2015-03-01 16:15 ` Johannes Weiner
2015-03-01 19:36 ` Theodore Ts'o
2015-03-01 20:44 ` Johannes Weiner
2015-03-01 20:17 ` Johannes Weiner
2015-03-01 21:48 ` Dave Chinner
2015-03-02 0:17 ` Dave Chinner
2015-03-02 12:46 ` Brian Foster
2015-02-28 18:36 ` Vlastimil Babka
2015-03-02 15:18 ` Michal Hocko
2015-03-02 16:05 ` Johannes Weiner
2015-03-02 17:10 ` Michal Hocko
2015-03-02 17:27 ` Johannes Weiner
2015-03-02 16:39 ` Theodore Ts'o
2015-03-02 16:58 ` Michal Hocko
2015-03-04 12:52 ` Dave Chinner
2015-02-17 14:59 ` Michal Hocko
2015-02-17 14:50 ` Michal Hocko
2015-02-17 14:37 ` Michal Hocko
2015-02-17 14:44 ` Michal Hocko
2015-02-16 11:23 ` Tetsuo Handa
2015-02-16 15:42 ` Johannes Weiner
2015-02-17 11:57 ` Tetsuo Handa
2015-02-17 13:16 ` Johannes Weiner
2015-02-17 16:50 ` Michal Hocko
2015-02-17 23:25 ` Dave Chinner
2015-02-18 8:48 ` Michal Hocko
2015-02-18 11:23 ` Tetsuo Handa
2015-02-18 12:29 ` Michal Hocko
2015-02-18 14:06 ` Tetsuo Handa
2015-02-18 14:25 ` Michal Hocko
2015-02-19 10:48 ` Tetsuo Handa
2015-02-20 8:26 ` Michal Hocko
2015-02-23 22:08 ` David Rientjes
2015-02-24 11:20 ` Tetsuo Handa
2015-02-24 15:20 ` Theodore Ts'o
2015-02-24 21:02 ` Dave Chinner
2015-02-25 14:31 ` Tetsuo Handa
2015-02-27 7:39 ` Dave Chinner
2015-02-27 12:42 ` Tetsuo Handa
2015-02-27 13:12 ` Dave Chinner
2015-03-04 12:41 ` Tetsuo Handa
2015-03-04 13:25 ` Dave Chinner
2015-03-04 14:11 ` Tetsuo Handa
2015-03-05 1:36 ` Dave Chinner
2015-02-17 16:33 ` Michal Hocko
2014-12-29 17:40 ` [PATCH] mm: get rid of radix tree gfp mask for pagecache_get_page (was: Re: How to handle TIF_MEMDIE stalls?) Michal Hocko
2014-12-29 18:45 ` Linus Torvalds
2014-12-29 19:33 ` Michal Hocko
2014-12-30 13:42 ` Michal Hocko
2014-12-30 21:45 ` Linus Torvalds
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