From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
To: David Rientjes <rientjes@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
Michal Hocko <mhocko@kernel.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [patch] mm, oom: prevent soft lockup on memcg oom for UP systems
Date: Sat, 14 Mar 2020 08:32:54 +0900 [thread overview]
Message-ID: <8395df04-9b7a-0084-4bb5-e430efe18b97@i-love.sakura.ne.jp> (raw)
In-Reply-To: <fa5d7060-4e6e-16d5-2c37-fec6019b4d62@i-love.sakura.ne.jp>
On 2020/03/14 8:15, Tetsuo Handa wrote:
> If current thread is
> an OOM victim, schedule_timeout_killable(1) will give other threads (including
> the OOM reaper kernel thread) CPU time to run.
If current thread is an OOM victim, schedule_timeout_killable(1) will give other
threads (including the OOM reaper kernel thread) CPU time to run, by leaving
try_charge() path due to should_force_charge() == true and reaching do_exit() path
instead of returning to userspace code doing "for (;;);".
Unless the problem is that current thread cannot reach should_force_charge() check,
schedule_timeout_killable(1) should work.
next prev parent reply other threads:[~2020-03-13 23:33 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-10 21:39 David Rientjes
2020-03-10 22:05 ` Tetsuo Handa
2020-03-10 22:55 ` David Rientjes
2020-03-11 9:34 ` Tetsuo Handa
2020-03-11 19:38 ` David Rientjes
2020-03-11 22:04 ` Tetsuo Handa
2020-03-11 22:14 ` David Rientjes
2020-03-12 0:12 ` Tetsuo Handa
2020-03-12 18:07 ` David Rientjes
2020-03-12 22:32 ` Andrew Morton
2020-03-16 9:31 ` Michal Hocko
2020-03-16 10:04 ` Tetsuo Handa
2020-03-16 10:14 ` Michal Hocko
2020-03-13 0:15 ` Tetsuo Handa
2020-03-13 22:01 ` David Rientjes
2020-03-13 23:15 ` Tetsuo Handa
2020-03-13 23:32 ` Tetsuo Handa [this message]
2020-03-16 23:59 ` David Rientjes
2020-03-17 3:18 ` Tetsuo Handa
2020-03-17 4:09 ` David Rientjes
2020-03-18 0:55 ` [patch v2] " David Rientjes
2020-03-18 9:42 ` Michal Hocko
2020-03-18 21:40 ` David Rientjes
2020-03-18 22:03 ` [patch v3] " David Rientjes
2020-03-19 7:09 ` Michal Hocko
2020-03-12 4:23 ` [patch] " Tetsuo Handa
2020-03-10 22:10 ` Michal Hocko
2020-03-10 23:02 ` David Rientjes
2020-03-11 8:27 ` Michal Hocko
2020-03-11 19:45 ` David Rientjes
2020-03-12 8:32 ` Michal Hocko
2020-03-12 18:20 ` David Rientjes
2020-03-12 20:16 ` Michal Hocko
2020-03-16 9:32 ` Michal Hocko
2020-03-11 0:18 ` Andrew Morton
2020-03-11 0:34 ` David Rientjes
2020-03-11 8:36 ` Michal Hocko
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