[ Adding Darrick on the off chance that this triggers an "aha, of
course it does!" ]
Darrick these corruption tests you added to xfstests last year all
fail the same way with DAX enabled. They spew:
"pwrite64: Structure needs cleaning"
...reports that are cleaned up by running without "-o dax".
Alternatively you could sit back and watch me try to figure it out,
that should be quite entertaining... as a start I'll try to pin down a
stack trace when the error is returned.
On Wed, Aug 3, 2016 at 7:45 PM, Xiong Zhou <xzhou@xxxxxxxxxx> wrote:
> Hi,
>
> A few xfs fuzzers in xfstests fail with dax mount option, pass without dax.
> They are xfs/086 xfs/088 xfs/089 xfs/091.
>
> xfstests to commit 4470ad4c7e (Jul 26)
> kernel to commit dd95069545 (Jul 24)
>
> + ./check xfs/091
> FSTYP -- xfs (non-debug)
> PLATFORM -- Linux/x86_64 rhel73 4.7.0+
> MKFS_OPTIONS -- -f -bsize=4096 /dev/pmem1
> MOUNT_OPTIONS -- -o context=system_u:object_r:nfs_t:s0 /dev/pmem1 /daxsch
>
> xfs/091 104s
> Ran: xfs/091
> Passed all 1 tests
>
> + echo 'MOUNT_OPTIONS="-o dax"'
> + ./check xfs/091
> FSTYP -- xfs (non-debug)
> PLATFORM -- Linux/x86_64 rhel73 4.7.0+
> MKFS_OPTIONS -- -f -bsize=4096 /dev/pmem1
> MOUNT_OPTIONS -- -o dax -o context=system_u:object_r:nfs_t:s0 /dev/pmem1
> /daxsch
>
> xfs/091 104s ... - output mismatch (see
> /root/xfstests/results//xfs/091.out.bad)
> --- tests/xfs/091.out 2016-07-18 02:57:47.670000000 -0400
> +++ /root/xfstests/results//xfs/091.out.bad 2016-08-03 22:38:14.948000000
> -0400
> @@ -6,6 +6,70 @@
> + corrupt image
> + mount image
> + modify files
> +pwrite64: Structure needs cleaning
> +pwrite64: Structure needs cleaning
> +pwrite64: Structure needs cleaning
> +pwrite64: Structure needs cleaning
> ...
> (Run 'diff -u tests/xfs/091.out /root/xfstests/results//xfs/091.out.bad'
> to see the entire diff)
> Ran: xfs/091
> Failures: xfs/091
> Failed 1 of 1 tests
>
> # diff -u xfstests/tests/xfs/091.out /root/xfstests/results//xfs/091.out.bad
> --- xfstests/tests/xfs/091.out 2016-07-18 02:57:47.670000000 -0400
> +++ /root/xfstests/results//xfs/091.out.bad 2016-08-03 22:38:14.948000000
> -0400
> @@ -6,6 +6,70 @@
> + corrupt image
> + mount image
> + modify files
> +pwrite64: Structure needs cleaning
> <snip 62 more same lines>
> +pwrite64: Structure needs cleaning
> + repair fs
> + mount image
> + chattr -R -i
>
>
> Thanks,
> Xiong
>
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