From: Michal Hocko <mhocko@kernel.org>
To: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Andrew Morton <akpm@linux-foundation.org>,
torvalds@linux-foundation.org, guro@fb.com, rientjes@google.com,
hannes@cmpxchg.org, vdavydov.dev@gmail.com, tj@kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH] mm,oom: Don't call schedule_timeout_killable() with oom_lock held.
Date: Thu, 31 May 2018 12:44:50 +0200 [thread overview]
Message-ID: <20180531104450.GN15278@dhcp22.suse.cz> (raw)
In-Reply-To: <16eca862-5fa6-2333-8a81-94a2c2692758@i-love.sakura.ne.jp>
On Thu 31-05-18 19:10:48, Tetsuo Handa wrote:
> On 2018/05/30 8:07, Andrew Morton wrote:
> > On Tue, 29 May 2018 09:17:41 +0200 Michal Hocko <mhocko@kernel.org> wrote:
> >
> >>> I suggest applying
> >>> this patch first, and then fix "mm, oom: cgroup-aware OOM killer" patch.
> >>
> >> Well, I hope the whole pile gets merged in the upcoming merge window
> >> rather than stall even more.
> >
> > I'm more inclined to drop it all. David has identified significant
> > shortcomings and I'm not seeing a way of addressing those shortcomings
> > in a backward-compatible fashion. Therefore there is no way forward
> > at present.
> >
>
> Can we apply my patch as-is first?
No. As already explained before. Sprinkling new sleeps without a strong
reason is not acceptable. The issue you are seeing is pretty artificial
and as such doesn're really warrant an immediate fix. We should rather
go with a well thought trhough fix. In other words we should simply drop
the sleep inside the oom_lock for starter unless it causes some really
unexpected behavior change.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2018-05-31 10:44 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-12 14:18 Tetsuo Handa
2018-05-15 9:16 ` Michal Hocko
2018-05-18 10:14 ` Tetsuo Handa
2018-05-18 12:20 ` Michal Hocko
2018-05-20 15:56 ` Tetsuo Handa
2018-05-22 6:18 ` Michal Hocko
2018-05-23 10:24 ` Tetsuo Handa
2018-05-23 11:57 ` Michal Hocko
2018-05-23 13:45 ` Tetsuo Handa
2018-05-23 14:56 ` Michal Hocko
2018-05-24 10:51 ` Tetsuo Handa
2018-05-24 11:50 ` Michal Hocko
2018-05-25 1:17 ` Tetsuo Handa
2018-05-25 8:31 ` Michal Hocko
2018-05-25 10:57 ` Tetsuo Handa
2018-05-25 11:42 ` Michal Hocko
2018-05-25 11:46 ` Tetsuo Handa
2018-05-28 12:43 ` Michal Hocko
2018-05-28 20:57 ` Tetsuo Handa
2018-05-29 7:17 ` Michal Hocko
2018-05-29 23:07 ` Andrew Morton
2018-05-31 10:10 ` Tetsuo Handa
2018-05-31 10:44 ` Michal Hocko [this message]
2018-05-31 15:23 ` Tetsuo Handa
2018-05-31 18:47 ` Michal Hocko
2018-06-01 1:21 ` Tetsuo Handa
2018-06-01 8:04 ` Michal Hocko
2018-06-01 15:28 ` Michal Hocko
2018-06-01 21:11 ` Andrew Morton
2018-06-04 7:04 ` Michal Hocko
2018-06-04 10:41 ` Tetsuo Handa
2018-06-04 11:22 ` Michal Hocko
2018-06-04 11:30 ` Tetsuo Handa
2018-06-06 9:02 ` David Rientjes
2018-06-06 13:37 ` Tetsuo Handa
2018-06-06 18:44 ` David Rientjes
2018-05-29 7:17 ` Michal Hocko
2018-05-29 8:16 ` Michal Hocko
2018-05-29 14:33 ` Tetsuo Handa
2018-05-29 17:18 ` Michal Hocko
2018-05-29 17:28 ` Michal Hocko
2018-05-31 16:31 ` [PATCH] mm, memcg, oom: fix pre-mature allocation failures kbuild test robot
-- strict thread matches above, loose matches on Subject: below --
2018-03-22 10:51 [PATCH] mm,oom: Don't call schedule_timeout_killable() with oom_lock held Tetsuo Handa
2018-03-22 11:45 ` Michal Hocko
2018-03-22 13:16 ` Tetsuo Handa
2018-01-22 13:46 Tetsuo Handa
2018-01-23 8:38 ` Michal Hocko
2018-01-23 12:07 ` Tetsuo Handa
2018-01-23 12:42 ` Michal Hocko
2018-01-24 13:28 ` Tetsuo Handa
2018-02-13 11:58 ` Tetsuo Handa
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