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From: Chris Mason on 27 May 2010 09:10
On Thu, May 27, 2010 at 11:06:54AM +0800, liubo wrote:
> On 05/22/2010 01:03 AM, Josef Bacik wrote:
> > In order for AIO to work, we need to implement aio_write. This patch converts
> > our btrfs_file_write to btrfs_aio_write. I've tested this with xfstests and
> > nothing broke, and the AIO stuff magically started working. Thanks,
> >
> > Signed-off-by: Josef Bacik <josef(a)redhat.com>
> >
>
> Hi, Josef,
>
> I've tested your patch(May 22) with my tools, and one case triggered a bug
> which made writev operation hang up, more information is followed.
>
> - Steps to trigger it:
> # mount /dev/sda8 /home/btrfsdisk -o nodatacow
> # gcc direct-io.c -o direct-io
> # ./direct-io O_DIRECT writev /home/btrfsdisk/testrw 4M

Thanks for sending along this test program and bug report. We've fixed
a few bugs in the O_DIRECT patches, and this is working now.

The merged result is in the for-linus branch of the btrfs unstable tree.

-chris
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From: liubo on 27 May 2010 21:50
On 05/27/2010 08:59 PM, Chris Mason wrote:
> Thanks for sending along this test program and bug report. We've fixed
> a few bugs in the O_DIRECT patches, and this is working now.
>
> The merged result is in the for-linus branch of the btrfs unstable tree.
>
> -chris
>

Oh, Thanks a lot. I've see your great effort.

-liubo
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