From: Dave Chinner <david@fromorbit.com>
To: Eric Sandeen <sandeen@redhat.com>
Cc: Lachlan McIlroy <lmcilroy@redhat.com>,
xfs mailing list <xfs@oss.sgi.com>
Subject: Re: [PATCH] xfstests 246: Test for race between direct I/O and mmap
Date: Thu, 18 Nov 2010 16:36:23 +1100 [thread overview]
Message-ID: <20101118053623.GU13830@dastard> (raw)
In-Reply-To: <4CDDC193.9030208@redhat.com>
On Fri, Nov 12, 2010 at 04:37:07PM -0600, Eric Sandeen wrote:
>
>
> From: Lachlan McIlroy <lmcilory@redhat.com>
>
> A customer reported a problem:
>
> If a process is using mmap to write to a file on an
> ext4 filesystem while another process is using direct
> I/O to write to the same file the first thread may
> receive a SIGBUS during a page fault.
>
> A SIGBUS occurs if the page fault tries to access a
> page that is entirely beyond the end of the file but
> in this test case that should not be happening.
>
> Signed-off-by: Eric Sandeen <sandeen@redhat.com>
> ---
looks fine to me.
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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prev parent reply other threads:[~2010-11-18 5:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-12 22:37 [PATCH] xfstests 246: Test for race between direct I/O and mmap Eric Sandeen
2010-11-15 1:01 ` Lachlan McIlroy
2010-11-15 3:57 ` Eric Sandeen
2010-11-18 5:36 ` Dave Chinner [this message]
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