why xfs_write() race with O_DIRECT only?

Mon Apr 6 12:38:55 CDT 2009

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?