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From: Michal Hocko <mhocko@kernel.org>
To: <linux-mm@kvack.org>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 0/2] oom, memcg: do not report racy no-eligible OOM
Date: Mon,  7 Jan 2019 15:38:00 +0100	[thread overview]
Message-ID: <20190107143802.16847-1-mhocko@kernel.org> (raw)

Hi,
I have posted this as an RFC previously [1]. Tetsuo has pointed out some
issues with the patch 1 which I have fixed hopefully. Other than that
this is just a rebase on top of Linus tree.

The original cover:
this is a follow up for [2] which has been nacked mostly because Tetsuo
was able to find a simple workload which can trigger a race where
no-eligible task is reported without a good reason. I believe the patch2
addresses that issue and we do not have to play dirty games with
throttling just because of the race. I still believe that patch proposed
in [2] is a useful one but this can be addressed later.

This series comprises 2 patch. The first one is something I meant to do
loooong time ago, I just never have time to do that. We need it here to
handle CLONE_VM without CLONE_SIGHAND cases. The second patch closes the
race.

Feedback is appreciated of course.

[1] http://lkml.kernel.org/r/20181022071323.9550-1-mhocko@kernel.org
[2] http://lkml.kernel.org/r/20181010151135.25766-1-mhocko@kernel.org



WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org>
To: linux-mm@kvack.org
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 0/2] oom, memcg: do not report racy no-eligible OOM
Date: Mon,  7 Jan 2019 15:38:00 +0100	[thread overview]
Message-ID: <20190107143802.16847-1-mhocko@kernel.org> (raw)

Hi,
I have posted this as an RFC previously [1]. Tetsuo has pointed out some
issues with the patch 1 which I have fixed hopefully. Other than that
this is just a rebase on top of Linus tree.

The original cover:
this is a follow up for [2] which has been nacked mostly because Tetsuo
was able to find a simple workload which can trigger a race where
no-eligible task is reported without a good reason. I believe the patch2
addresses that issue and we do not have to play dirty games with
throttling just because of the race. I still believe that patch proposed
in [2] is a useful one but this can be addressed later.

This series comprises 2 patch. The first one is something I meant to do
loooong time ago, I just never have time to do that. We need it here to
handle CLONE_VM without CLONE_SIGHAND cases. The second patch closes the
race.

Feedback is appreciated of course.

[1] http://lkml.kernel.org/r/20181022071323.9550-1-mhocko@kernel.org
[2] http://lkml.kernel.org/r/20181010151135.25766-1-mhocko@kernel.org

             reply	other threads:[~2019-01-07 14:39 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-07 14:38 Michal Hocko [this message]
2019-01-07 14:38 ` [PATCH 0/2] oom, memcg: do not report racy no-eligible OOM Michal Hocko
2019-01-07 14:38 ` [PATCH 1/2] mm, oom: marks all killed tasks as oom victims Michal Hocko
2019-01-07 14:38   ` Michal Hocko
2019-01-07 20:58   ` Tetsuo Handa
2019-01-08  8:11     ` Michal Hocko
2019-01-07 14:38 ` [PATCH 2/2] memcg: do not report racy no-eligible OOM tasks Michal Hocko
2019-01-07 14:38   ` Michal Hocko
2019-01-07 20:59   ` Tetsuo Handa
2019-01-08  8:14     ` Michal Hocko
2019-01-08 10:39       ` Tetsuo Handa
2019-01-08 11:46         ` Michal Hocko
2019-01-08  8:35   ` kbuild test robot
2019-01-08  9:39     ` Michal Hocko
2019-01-11  0:23       ` [kbuild-all] " Rong Chen
2019-01-08 14:21 ` [PATCH 3/2] memcg: Facilitate termination of memcg OOM victims Tetsuo Handa
2019-01-08 14:38   ` Michal Hocko
2019-01-09 11:03 ` [PATCH 0/2] oom, memcg: do not report racy no-eligible OOM Michal Hocko
2019-01-09 11:34   ` Tetsuo Handa
2019-01-09 12:02     ` Michal Hocko
2019-01-10 23:59       ` Tetsuo Handa
2019-01-11 10:25         ` Tetsuo Handa
2019-01-11 11:33           ` Michal Hocko
2019-01-11 12:40             ` Tetsuo Handa
2019-01-11 13:34               ` Michal Hocko
2019-01-11 14:31                 ` Tetsuo Handa
2019-01-11 15:07                   ` Michal Hocko
2019-01-11 15:37                     ` Tetsuo Handa
2019-01-11 16:45                       ` Michal Hocko
2019-01-12 10:52                         ` Tetsuo Handa
2019-01-13 17:36                           ` Michal Hocko

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