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* [PATCH 0/2] mm, oom: fix oom_reaper fallouts
@ 2017-08-07 11:38 ` Michal Hocko
  0 siblings, 0 replies; 58+ messages in thread
From: Michal Hocko @ 2017-08-07 11:38 UTC (permalink / raw)
  To: Andrew Morton
  Cc: Andrea Argangeli, Kirill A. Shutemov, Tetsuo Handa,
	Oleg Nesterov, Wenwei Tao, linux-mm, LKML

Hi,
there are two issues this patch series attempts to fix. First one is
something that has been broken since MMF_UNSTABLE flag introduction
and I guess we should backport it stable trees (patch 1). The other
issue has been brought up by Wenwei Tao and Tetsuo Handa has created
a test case to trigger it very reliably. I am not yet sure this is a
stable material because the test case is rather artificial. If there is
a demand for the stable backport I will prepare it, of course, though.

I hope I've done the second patch correctly but I would definitely
appreciate some more eyes on it. Hence CCing Andrea and Kirill. My
previous attempt with some more context was posted here
http://lkml.kernel.org/r/20170803135902.31977-1-mhocko@kernel.org

My testing didn't show anything unusual with these two applied on top of
the mmotm tree.

^ permalink raw reply	[flat|nested] 58+ messages in thread
* Re: Re: [PATCH] mm, oom: fix potential data corruption when oom_reaper races with writer
@ 2017-08-04  8:32 Michal Hocko
  2017-08-04  8:33 ` [PATCH 1/2] mm: fix double mmap_sem unlock on MMF_UNSTABLE enforced SIGBUS Michal Hocko
  0 siblings, 1 reply; 58+ messages in thread
From: Michal Hocko @ 2017-08-04  8:32 UTC (permalink / raw)
  To: Tetsuo Handa
  Cc: linux-mm, Andrew Morton, Wenwei Tao, Oleg Nesterov, David Rientjes, LKML

On Fri 04-08-17 17:25:46, Tetsuo Handa wrote:
> Well, while lockdep warning is gone, this problem is remaining.

Ohh, I should have been more specific. Both patches have to be applied.
I have based this one first because it should go to stable. The later
one needs a trivial conflict resolution. I will send both of them as a
reply to this email!

Thanks for retesting. It matches my testing results.
-- 
Michal Hocko
SUSE Labs

^ permalink raw reply	[flat|nested] 58+ messages in thread

end of thread, other threads:[~2017-08-17 13:58 UTC | newest]

Thread overview: 58+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-08-07 11:38 [PATCH 0/2] mm, oom: fix oom_reaper fallouts Michal Hocko
2017-08-07 11:38 ` Michal Hocko
2017-08-07 11:38 ` [PATCH 1/2] mm: fix double mmap_sem unlock on MMF_UNSTABLE enforced SIGBUS Michal Hocko
2017-08-07 11:38   ` Michal Hocko
2017-08-15  0:49   ` David Rientjes
2017-08-15  0:49     ` David Rientjes
2017-08-07 11:38 ` [PATCH 2/2] mm, oom: fix potential data corruption when oom_reaper races with writer Michal Hocko
2017-08-07 11:38   ` Michal Hocko
2017-08-08 17:48   ` Andrea Arcangeli
2017-08-08 17:48     ` Andrea Arcangeli
2017-08-08 23:35     ` Tetsuo Handa
2017-08-08 23:35       ` Tetsuo Handa
2017-08-09 18:36       ` Andrea Arcangeli
2017-08-09 18:36         ` Andrea Arcangeli
2017-08-10  8:21     ` Michal Hocko
2017-08-10  8:21       ` Michal Hocko
2017-08-10 13:33       ` Michal Hocko
2017-08-10 13:33         ` Michal Hocko
2017-08-11  2:28   ` Tetsuo Handa
2017-08-11  2:28     ` Tetsuo Handa
2017-08-11  7:09     ` Michal Hocko
2017-08-11  7:09       ` Michal Hocko
2017-08-11  7:54       ` Tetsuo Handa
2017-08-11  7:54         ` Tetsuo Handa
2017-08-11 10:22         ` Andrea Arcangeli
2017-08-11 10:22           ` Andrea Arcangeli
2017-08-11 10:42           ` Andrea Arcangeli
2017-08-11 10:42             ` Andrea Arcangeli
2017-08-11 11:53             ` Tetsuo Handa
2017-08-11 11:53               ` Tetsuo Handa
2017-08-11 12:08         ` Michal Hocko
2017-08-11 12:08           ` Michal Hocko
2017-08-11 15:46           ` Tetsuo Handa
2017-08-11 15:46             ` Tetsuo Handa
2017-08-14 13:59             ` Michal Hocko
2017-08-14 13:59               ` Michal Hocko
2017-08-14 22:51               ` Tetsuo Handa
2017-08-15  6:55                 ` Michal Hocko
2017-08-15  6:55                   ` Michal Hocko
2017-08-15  8:41                 ` Michal Hocko
2017-08-15  8:41                   ` Michal Hocko
2017-08-15 10:06                   ` Tetsuo Handa
2017-08-15 12:26                     ` Michal Hocko
2017-08-15 12:26                       ` Michal Hocko
2017-08-15 12:58                       ` Tetsuo Handa
2017-08-17 13:58                         ` Michal Hocko
2017-08-17 13:58                           ` Michal Hocko
2017-08-15  5:30               ` Tetsuo Handa
2017-08-07 13:28 ` [PATCH 0/2] mm, oom: fix oom_reaper fallouts Tetsuo Handa
2017-08-07 13:28   ` Tetsuo Handa
2017-08-07 14:04   ` Michal Hocko
2017-08-07 14:04     ` Michal Hocko
2017-08-07 15:23     ` Tetsuo Handa
2017-08-07 15:23       ` Tetsuo Handa
2017-08-15 12:29 ` Michal Hocko
2017-08-15 12:29   ` Michal Hocko
  -- strict thread matches above, loose matches on Subject: below --
2017-08-04  8:32 Re: [PATCH] mm, oom: fix potential data corruption when oom_reaper races with writer Michal Hocko
2017-08-04  8:33 ` [PATCH 1/2] mm: fix double mmap_sem unlock on MMF_UNSTABLE enforced SIGBUS Michal Hocko
2017-08-04  8:33   ` [PATCH 2/2] mm, oom: fix potential data corruption when oom_reaper races with writer Michal Hocko
2017-08-04  8:33     ` Michal Hocko

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