From: Michal Hocko <mhocko@kernel.org>
To: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: akpm@linux-foundation.org, andrea@kernel.org,
kirill@shutemov.name, oleg@redhat.com,
wenwei.tww@alibaba-inc.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: Re: Re: Re: [PATCH 2/2] mm, oom: fix potential data corruption when oom_reaper races with writer
Date: Thu, 17 Aug 2017 15:58:10 +0200 [thread overview]
Message-ID: <20170817135810.GB17786@dhcp22.suse.cz> (raw)
In-Reply-To: <201708151258.v7FCwTsV029946@www262.sakura.ne.jp>
On Tue 15-08-17 21:58:29, Tetsuo Handa wrote:
[...]
> If I apply this patch, I can no longer reproduce this problem even with btrfs.
>
> -+ * and could cause a memory corruption (zero pages instead of the
> -+ * original content).
> ++ * and could cause a memory corruption (random content instead of the
> ++ * original content).
If anything then I would word it this way
and could cause a memory corruption (zero pages for refaults but even a
random content has been observed but never explained properly)
> Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Thanks
--
Michal Hocko
SUSE Labs
WARNING: multiple messages have this Message-ID (diff)
From: Michal Hocko <mhocko@kernel.org>
To: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: akpm@linux-foundation.org, andrea@kernel.org,
kirill@shutemov.name, oleg@redhat.com,
wenwei.tww@alibaba-inc.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: Re: Re: Re: [PATCH 2/2] mm, oom: fix potential data corruption when oom_reaper races with writer
Date: Thu, 17 Aug 2017 15:58:10 +0200 [thread overview]
Message-ID: <20170817135810.GB17786@dhcp22.suse.cz> (raw)
In-Reply-To: <201708151258.v7FCwTsV029946@www262.sakura.ne.jp>
On Tue 15-08-17 21:58:29, Tetsuo Handa wrote:
[...]
> If I apply this patch, I can no longer reproduce this problem even with btrfs.
>
> -+ * and could cause a memory corruption (zero pages instead of the
> -+ * original content).
> ++ * and could cause a memory corruption (random content instead of the
> ++ * original content).
If anything then I would word it this way
and could cause a memory corruption (zero pages for refaults but even a
random content has been observed but never explained properly)
> Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Thanks
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2017-08-17 13:58 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
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 [this message]
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
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