From: Michal Hocko <mhocko@kernel.org>
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: linux-mm@kvack.org, akpm@linux-foundation.org,
torvalds@linux-foundation.org,
David Rientjes <rientjes@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Roman Gushchin <guro@fb.com>, Tejun Heo <tj@kernel.org>,
Vladimir Davydov <vdavydov.dev@gmail.com>
Subject: Re: [PATCH 5/8] mm,oom: Bring OOM notifier to outside of oom_lock.
Date: Tue, 3 Jul 2018 16:59:36 +0200 [thread overview]
Message-ID: <20180703145936.GO16767@dhcp22.suse.cz> (raw)
In-Reply-To: <1530627910-3415-6-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp>
On Tue 03-07-18 23:25:06, Tetsuo Handa wrote:
> Since blocking_notifier_call_chain() in out_of_memory() might sleep,
> sleeping with oom_lock held is currently an unavoidable problem.
This is wrong. The problem is avoidable by simply removing the oom
notifiers as they are pure ugliness which we should have never allowed
to live in the first place.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2018-07-03 14:59 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-03 14:25 [PATCH 0/8] OOM killer/reaper changes for avoiding OOM lockup problem Tetsuo Handa
2018-07-03 14:25 ` [PATCH 1/8] mm,oom: Don't call schedule_timeout_killable() with oom_lock held Tetsuo Handa
2018-07-03 14:38 ` Michal Hocko
2018-07-03 14:25 ` [PATCH 2/8] mm,oom: Check pending victims earlier in out_of_memory() Tetsuo Handa
2018-07-03 14:25 ` [PATCH 3/8] mm,oom: Fix unnecessary killing of additional processes Tetsuo Handa
2018-07-03 14:58 ` Michal Hocko
2018-07-03 14:25 ` [PATCH 4/8] mm,page_alloc: Make oom_reserves_allowed() even Tetsuo Handa
2018-07-03 14:25 ` [PATCH 5/8] mm,oom: Bring OOM notifier to outside of oom_lock Tetsuo Handa
2018-07-03 14:59 ` Michal Hocko [this message]
2018-07-03 14:25 ` [PATCH 6/8] mm,oom: Make oom_lock static variable Tetsuo Handa
2018-07-03 14:25 ` [PATCH 7/8] mm,oom: Do not sleep with oom_lock held Tetsuo Handa
2018-07-03 14:25 ` [PATCH 8/8] mm,page_alloc: Move the short sleep to should_reclaim_retry() Tetsuo Handa
2018-07-03 15:12 ` [PATCH 0/8] OOM killer/reaper changes for avoiding OOM lockup problem Michal Hocko
2018-07-03 15:29 ` Michal Hocko
2018-07-04 2:22 ` penguin-kernel
2018-07-04 7:16 ` Michal Hocko
2018-07-04 7:22 ` Michal Hocko
2018-07-05 3:05 ` Tetsuo Handa
2018-07-05 7:24 ` Michal Hocko
2018-07-06 2:40 ` Tetsuo Handa
2018-07-06 2:49 ` Linus Torvalds
2018-07-07 1:12 ` Tetsuo Handa
2018-07-09 7:45 ` Michal Hocko
2018-07-06 5:56 ` Michal Hocko
2018-07-10 3:57 ` Tetsuo Handa
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