On Thu, Aug 16, 2012 at 11:37:57AM +0200, Jan Kara wrote:
> I was looking into why test 272 from xfstests fails for ext3 and the
> reason is that ext3 does not support direct IO to file with enabled data
> journalling (open returns EINVAL because ->direct_IO callback is not
> specified). So I was thinking how to accomodate this fact in the test -
> the best I found was to just check using xfs_io whether O_DIRECT open
> succeeds and perform the test only in that case. Attached patch does this
> or do people have other ideas?
# ext3 doesn't support direct IO in journalling mode
ext3_write_opt_list="iflag=noatime conv=notrunc conv=fsync"
ext4_write_opt_list="iflag=noatime conv=notrunc conv=fsync oflag=direct"
if [ $FSTYP = "ext3" ]; then
> diff --git a/272 b/272
> index 26dfa3b..e39c52b 100755
> --- a/272
> +++ b/272
> @@ -52,6 +52,12 @@ _workout()
> echo "OP write_opt: $write_opt 4M, \
> chattr_opt: $chattr_opt"
> + if [ "$write_opt" = "oflag=direct" ]; then
> + # Some filesystems don't support direct IO
> + # in some cases, check for that
> + xfs_io -F -d -f -c "" $SCRATCH_MNT/file.$idx \
> + >> $seq.full 2>&1 || continue
> + fi
That only fixes one of the two places that does direct IO on a
jounralled file. The above will fix both...