Re: [LKP] [xfs] 834ffca6f7e: WARNING: CPU: 3 PID: 23390 at fs/xfs/xfs_file.c:700 xfs_file_dio_aio_write+0x27c/0x2e0()
On Fri, Mar 27, 2015 at 08:32:23AM +0800, Huang Ying wrote:
On Fri, 2015-03-27 at 08:22 +1100, Dave Chinner wrote:
> On Thu, Mar 26, 2015 at 02:45:19PM +0800, Huang Ying wrote:
> > FYI, we noticed the below changes on
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > commit 834ffca6f7e345a79f6f2e2d131b0dfba8a4b67a ("xfs: don't zero
partial page cache pages during O_DIRECT writes")
>
> Doing what test, exactly?
Sorry, should include that information. We were running xfstests.
generic/068 generic/100 generic/117 generic/120 generic/125 generic/130
generic/192 generic/209 generic/223 generic/225 generic/226 generic/230
generic/247 generic/256 generic/275
^^^^^^^^^^^
$ ./lsqa.pl tests/generic/247
FS QA Test No. 247
Test for race between direct I/O and mmap
$
i.e. xfstests runs tests designed specifically to hit direct IO vs
mmap races like this, so warnings about DIO/mmap races like this are
to be expected....
Cheers,
Dave.
--
Dave Chinner
david(a)fromorbit.com