Re: [Qemu-devel] [PATCH v5 0/4] Use blkdebug to make test deterministic

[Stefan Hajnoczi <stefanha@gmail.com>]

On Mon, Nov 18, 2013 at 03:01:47PM +0800, Fam Zheng wrote:
> This adds "remove_break" command to block, which removes a break point defined
> with "break". It is used in iotests.py to pause and resume drive in block job
> cases to make the test deterministic.
> 
> v5: Addressing Max's comments (thanks for reviewing)
>     [02] Resume all the requests.
>     [03] Fix event="" case. Change default value to None.
>          Change resume to bool.
>     [04] Change resume to bool
> 
> v4: [01] Added.
>     [03] Add common method pair "pause_drive" and "resume_drive".
>     [04] Also fix 040, 055.
> 
> Fam Zheng (4):
>   qemu-iotests: Drop local version of cancel_and_wait from 040
>   blkdebug: add "remove_break" command
>   qemu-iotest: Add pause_drive and resume_drive methods
>   qemu-iotests: Make test case 030, 040 and 055 deterministic
> 
>  block.c                       | 13 +++++++++++++
>  block/blkdebug.c              | 27 +++++++++++++++++++++++++++
>  include/block/block.h         |  1 +
>  include/block/block_int.h     |  2 ++
>  qemu-io-cmds.c                | 22 ++++++++++++++++++++++
>  tests/qemu-iotests/030        | 16 +++++++++++-----
>  tests/qemu-iotests/040        | 19 +++----------------
>  tests/qemu-iotests/055        | 15 +++++++++++----
>  tests/qemu-iotests/iotests.py | 18 +++++++++++++++++-
>  9 files changed, 107 insertions(+), 26 deletions(-)

I get this failure after applying the patches onto my block-next tree:

$ ./check -qcow2 055
QEMU          -- /home/stefanha/qemu/tests/qemu-iotests/qemu
QEMU_IMG      -- /home/stefanha/qemu/tests/qemu-iotests/qemu-img
QEMU_IO       -- /home/stefanha/qemu/tests/qemu-iotests/qemu-io 
IMGFMT        -- qcow2 (compat=1.1)
IMGPROTO      -- file
PLATFORM      -- Linux/x86_64 stefanha-thinkpad 3.11.8-300.fc20.x86_64
SOCKET_SCM_HELPER -- 

055 9s ... [failed, exit status 1] - output mismatch (see 055.out.bad)
--- 055.out	2013-10-08 13:23:38.412934858 +0200
+++ 055.out.bad	2013-11-19 16:30:31.100351135 +0100
@@ -1,5 +1,15 @@
-..............
+.......F......
+======================================================================
+FAIL: test_pause (__main__.TestSingleDrive)
+----------------------------------------------------------------------
+Traceback (most recent call last):
+  File "./055", line 80, in test_pause
+    self.assert_qmp(result, 'return[0]/offset', offset)
+  File "/home/stefanha/qemu/tests/qemu-iotests/iotests.py", line 232, in assert_qmp
+    self.assertEqual(result, value, 'values not equal "%s" and "%s"' % (str(result), str(value)))
+AssertionError: values not equal "65536" and "0"
+
 ----------------------------------------------------------------------
 Ran 14 tests
 
-OK
+FAILED (failures=1)
Failures: 055
Failed 1 of 1 tests