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Re: why xfs_write() race with O_DIRECT only?

To: Curtis Doty <Curtis@xxxxxxxxxxxx>
Subject: Re: why xfs_write() race with O_DIRECT only?
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Mon, 6 Apr 2009 13:38:55 -0400
Cc: XFS <xfs@xxxxxxxxxxx>
In-reply-to: <49CD7912.6080508@xxxxxxxxxxxx>
References: <49CD7912.6080508@xxxxxxxxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)
On Fri, Mar 27, 2009 at 06:10:42PM -0700, Curtis Doty wrote:
> I'm guessing this is the race fixed in 2.6.29.
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=25051158
> But my app is running O_DIRECT and only calls pwrite(). Is there
> something I'm missing that explains the aio stuff etc.?

The aboe patch only matters when using dmapi.  Can you send a simple
sample program or other kind of testcases that reproduces the bug that
you see?

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