On Thu, Aug 21, 2014 at 02:01:38AM +0000, Ma, Jianpeng wrote:

quoted

-----Original Message-----
From: Zach Brown [mailto:zab@zabbo.net]
Sent: Thursday, August 21, 2014 2:44 AM
To: Ma, Jianpeng
Cc: viro@zeniv.linux.org.uk; Sage Weil; Mark Kirkwood; linux-aio@kvack.org;
linux-fsdevel@vger.kernel.org
Subject: Re: [HELP]: about aio+dio

On Wed, Aug 20, 2014 at 04:05:01AM +0000, Ma, Jianpeng wrote:

quoted

Hi all,
   At present, I met a problem.
Open(block, DIRECT_IO)
Io_submit()--->write operation
Close()
Exit(0)

After exit(), we found the content of block changed. If we only use aio, the

bug can't reproduce.

quoted

Q1: Is close() wait until all aio to complete? Is exit() to wait until aio to

complete?

exit().

Can you explain in detail? If you can point the code, I think it better.

Huh, look at that.  It certianly used to.  But it looks like exit_aio()
upstream isn't waiting for iocbs to complete.  So we'll need to get that
fixed :).

- z

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