From: Michal Hocko <mhocko@suse.com>
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
Cong Wang <xiyou.wangcong@gmail.com>,
Dave Hansen <dave.hansen@intel.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Mel Gorman <mgorman@suse.de>, Vlastimil Babka <vbabka@suse.cz>
Subject: Re: [PATCH] mm,page_alloc: Serialize warn_alloc() if schedulable.
Date: Thu, 1 Jun 2017 13:59:36 +0200 [thread overview]
Message-ID: <20170601115936.GA9091@dhcp22.suse.cz> (raw)
In-Reply-To: <1496317427-5640-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp>
On Thu 01-06-17 20:43:47, Tetsuo Handa wrote:
> Cong Wang has reported a lockup when running LTP memcg_stress test [1].
This seems to be on an old and not pristine kernel. Does it happen also
on the vanilla up-to-date kernel?
[...]
> Therefore, this patch uses a mutex dedicated for warn_alloc() like
> suggested in [3].
As I've said previously. We have rate limiting and if that doesn't work
out well, let's tune it. The lock should be the last resort to go with.
We already throttle show_mem, maybe we can throttle dump_stack as well,
although it sounds a bit strange that this adds so much to the picture.
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2017-06-01 11:59 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-01 11:43 [PATCH] mm,page_alloc: Serialize warn_alloc() if schedulable Tetsuo Handa
2017-06-01 11:59 ` Michal Hocko [this message]
2017-06-01 13:11 ` Tetsuo Handa
2017-06-01 13:28 ` Michal Hocko
2017-06-01 22:10 ` Andrew Morton
2017-06-02 7:18 ` Michal Hocko
2017-06-02 11:13 ` Tetsuo Handa
2017-06-02 12:15 ` Michal Hocko
2017-06-02 17:13 ` Tetsuo Handa
2017-06-02 21:57 ` Cong Wang
2017-06-04 8:58 ` Tetsuo Handa
2017-06-04 15:05 ` Michal Hocko
2017-06-04 21:43 ` Tetsuo Handa
2017-06-05 5:37 ` Michal Hocko
2017-06-05 18:15 ` Cong Wang
2017-06-06 9:17 ` Michal Hocko
2017-06-05 18:25 ` Cong Wang
2017-06-22 10:35 ` Tetsuo Handa
2017-06-22 22:53 ` Cong Wang
2017-06-02 16:59 ` Cong Wang
2017-06-02 19:59 ` Andrew Morton
2017-06-03 2:57 ` Tetsuo Handa
2017-06-03 7:32 ` Michal Hocko
2017-06-03 8:36 ` Tetsuo Handa
2017-06-05 7:10 ` Sergey Senozhatsky
2017-06-05 9:36 ` Sergey Senozhatsky
2017-06-05 15:02 ` Tetsuo Handa
2017-06-03 13:21 ` Tetsuo Handa
2017-07-08 4:59 ` Tetsuo Handa
2017-07-10 13:21 ` Michal Hocko
2017-07-10 13:54 ` Tetsuo Handa
2017-07-10 14:14 ` Michal Hocko
2017-07-11 13:10 ` Tetsuo Handa
2017-07-11 13:49 ` Michal Hocko
2017-07-11 14:58 ` Petr Mladek
2017-07-11 22:06 ` Tetsuo Handa
2017-07-12 8:54 ` Michal Hocko
2017-07-12 12:23 ` Tetsuo Handa
2017-07-12 12:41 ` Michal Hocko
2017-07-14 12:30 ` Tetsuo Handa
2017-07-14 12:48 ` Michal Hocko
2017-08-09 6:14 ` Tetsuo Handa
2017-08-09 13:01 ` Tetsuo Handa
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