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From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
To: "Arkadiusz Miśkiewicz" <a.miskiewicz@gmail.com>
Cc: Tejun Heo <tj@kernel.org>,
	cgroups@vger.kernel.org, Aleksa Sarai <asarai@suse.de>,
	Jay Kamat <jgkamat@fb.com>, Roman Gushchin <guro@fb.com>,
	Michal Hocko <mhocko@suse.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	linux-kernel@vger.kernel.org,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: pids.current with invalid value for hours [5.0.0 rc3 git]
Date: Sat, 26 Jan 2019 15:10:38 +0900
Message-ID: <72aa8863-a534-b8df-6b9e-f69cf4dd5c4d@i-love.sakura.ne.jp> (raw)
In-Reply-To: <6da6ca69-5a6e-a9f6-d091-f89a8488982a@gmail.com>

On 2019/01/26 11:41, Arkadiusz Miśkiewicz wrote:
> dmesg:
> http://ixion.pld-linux.org/~arekm/cgroup-oom-2.txt

What is wrong with this output? It seems to me that the OOM killer is killing
processes as soon as python 3 fork()s one. Although "potentially unexpected
fatal signal 7." messages due to handling SIGBUS at get_signal() after the
OOM reaper reclaimed the OOM victim's memory is a bit noisy, I don't think
that something is wrong.

  Jan 26 03:33:49 xps kernel: python3 invoked oom-killer: gfp_mask=0x6000c0(GFP_KERNEL), order=0, oom_score_adj=0
  Jan 26 03:33:52 xps kernel: potentially unexpected fatal signal 7.

You seem to be monitoring cgroup statistic values for only 1 minute, but
since the fork bombs might take longer than 1 minute, I'm not sure that
the statistic values after terminating cg.py and waited for a while (e.g.
1 minute) is still showing unexpected values.


  reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <df806a77-3327-9db5-8be2-976fde1c84e5@gmail.com>
     [not found] ` <20190117122535.njcbqhlmzozdkncw@mikami>
     [not found]   ` <1d36b181-cbaf-6694-1a31-2f7f55d15675@gmail.com>
     [not found]     ` <96ef6615-a5df-30af-b4dc-417a18ca63f1@gmail.com>
2019-01-25  7:52       ` Arkadiusz Miśkiewicz
2019-01-25 16:37         ` Tejun Heo
2019-01-25 19:47           ` Arkadiusz Miśkiewicz
2019-01-26  1:27             ` Tetsuo Handa
2019-01-26  2:41               ` Arkadiusz Miśkiewicz
2019-01-26  6:10                 ` Tetsuo Handa [this message]
2019-01-26  7:55                   ` Tetsuo Handa
2019-01-26 11:09                     ` Tetsuo Handa
2019-01-26 11:29                       ` Arkadiusz Miśkiewicz
2019-01-26 13:10                         ` [PATCH v2] oom, oom_reaper: do not enqueue same task twice Tetsuo Handa
2019-01-27  8:37                           ` Michal Hocko
2019-01-27 10:56                             ` Tetsuo Handa
2019-01-27 11:40                               ` Michal Hocko
2019-01-27 14:57                                 ` [PATCH v3] " Tetsuo Handa
2019-01-27 16:58                                   ` Michal Hocko
2019-01-27 23:00                                   ` Roman Gushchin
2019-01-28 18:15                                   ` Andrew Morton
2019-01-28 18:42                                     ` Michal Hocko
2019-01-28 21:53                                   ` Johannes Weiner
2019-01-29 10:34                                     ` Tetsuo Handa
2019-01-26  1:41             ` pids.current with invalid value for hours [5.0.0 rc3 git] Roman Gushchin
2019-01-26  2:28               ` Arkadiusz Miśkiewicz

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