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Date: Thu, 17 Aug 2017 15:58:10 +0200
From: Michal Hocko <mhocko@kernel.org>
Subject: Re: Re: Re: Re: [PATCH 2/2] mm, oom: fix potential data corruption
 when oom_reaper races with writer
Message-ID: <20170817135810.GB17786@dhcp22.suse.cz>
References: <201708151006.v7FA6SxD079619@www262.sakura.ne.jp>
 <20170815122621.GE29067@dhcp22.suse.cz>
 <201708151258.v7FCwTsV029946@www262.sakura.ne.jp>
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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

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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