trusty: fail to pass xfstests(generic/324)

[Ming Lei]

ming@am2:~/git/xfstests$ sudo ./check generic/324
FSTYP -- ext4
PLATFORM -- Linux/aarch64 am2 3.13.0-37-generic
MKFS_OPTIONS -- /dev/loop1
MOUNT_OPTIONS -- -o acl,user_xattr /dev/loop1 /mnt/scratch

generic/324 23s ... [failed, exit status 1] - output mismatch (see /home/ming/git/xfstests/results//generic/324.out.bad)
    --- tests/generic/324.out 2015-02-03 22:09:26.602282659 -0500
    +++ /home/ming/git/xfstests/results//generic/324.out.bad 2015-03-09 04:51:37.300264691 -0400
    @@ -22,2509 +22,5 @@
     XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
     Before: in_range(10, 40)
     After: in_range(1, -1)
    -Defragment file with 250 * 2 fragments
    -wrote 1234/1234 bytes at offset 0
    -XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
    -wrote 1234/1234 bytes at offset 123400
    ...
    (Run 'diff -u tests/generic/324.out /home/ming/git/xfstests/results//generic/324.out.bad' to see the entire diff)

No such issue on the latest upstream kernel(4.0).

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1430184

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Joseph Salisbury (jsalisbury)]

It looks like an older Trusty kernel was used for the test. It might be worthwhile to test the latest Trusty kernel, which is: 3.13.0-46.77

It might also be good to test the latest 3.13 upstream kernel to see if it also exhibits the bug. It can be downloaded from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13.11-ckt16-trusty/

[Ming Lei (tom-leiming)]

It is fixed by upstream commit(merged to 3.14):

    a9b8241 ext4: merge uninitialized extents

I have sent the patch to ubuntu kernel mail list already.

[Ming Lei (tom-leiming)]

BTW, the patch in #3 fixes xfstests(ext4/308) at the same time too.

[Brad Figg (brad-figg)]

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-trusty' to 'verification-done-trusty'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 3.13.0-49.81

---------------
linux (3.13.0-49.81) trusty; urgency=low

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