Re: [Qemu-devel] Failing QEMU iotest 175

[Max Reitz]

On 10.05.19 18:42, Thomas Huth wrote:
> On 10/05/2019 15.54, Max Reitz wrote:
>> On 28.04.19 17:18, Thomas Huth wrote:
>>> QEMU iotest 175 is failing for me when I run it with -raw:
>>>
>>> $ ./check -raw 175
>>> QEMU          --
>>> "/home/thuth/tmp/qemu-build/tests/qemu-iotests/../../x86_64-softmmu/qemu-system-x86_64"
>>> -nodefaults -machine accel=qtest
>>> QEMU_IMG      --
>>> "/home/thuth/tmp/qemu-build/tests/qemu-iotests/../../qemu-img"
>>> QEMU_IO       --
>>> "/home/thuth/tmp/qemu-build/tests/qemu-iotests/../../qemu-io"  --cache
>>> writeback -f raw
>>> QEMU_NBD      --
>>> "/home/thuth/tmp/qemu-build/tests/qemu-iotests/../../qemu-nbd"
>>> IMGFMT        -- raw
>>> IMGPROTO      -- file
>>> PLATFORM      -- Linux/x86_64 thuth 3.10.0-957.10.1.el7.x86_64
>>> TEST_DIR      -- /home/thuth/tmp/qemu-build/tests/qemu-iotests/scratch
>>> SOCKET_SCM_HELPER --
>>> /home/thuth/tmp/qemu-build/tests/qemu-iotests/socket_scm_helper
>>>
>>> 175         - output mismatch (see 175.out.bad)
>>> --- /home/thuth/devel/qemu/tests/qemu-iotests/175.out       2019-04-23
>>> 16:43:12.000000000 +0200
>>> +++ /home/thuth/tmp/qemu-build/tests/qemu-iotests/175.out.bad       
>>> 2019-04-28
>>> 17:17:32.000000000 +0200
>>> @@ -2,17 +2,17 @@
>>>
>>>  == creating image with default preallocation ==
>>>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
>>> -size=1048576, blocks=0
>>> +size=1048576, blocks=2
>>>
>>>  == creating image with preallocation off ==
>>>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 preallocation=off
>>> -size=1048576, blocks=0
>>> +size=1048576, blocks=2
>>>
>>>  == creating image with preallocation full ==
>>>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 preallocation=full
>>> -size=1048576, blocks=2048
>>> +size=1048576, blocks=2050
>>>
>>>  == creating image with preallocation falloc ==
>>>  Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
>>> preallocation=falloc
>>> -size=1048576, blocks=2048
>>> +size=1048576, blocks=2050
>>>   *** done
>>> Failures: 175
>>> Failed 1 of 1 tests
>>>
>>> Any ideas how to fix this?
>>
>> Hm.  What output does
>>
>> $ touch foo
>> $ stat -c "size=%s, blocks=%b" foo
>> $ truncate -s 1M foo
>> $ stat -c "size=%s, blocks=%b" foo
>>
>> give for you?
>>
>> If any of that returns blocks=2, we can probably just use that operation
>> to fix the result, then.
> 
> $ stat -c "size=%s, blocks=%b" foo
> size=0, blocks=2
> $ truncate -s 1M foo
> $ stat -c "size=%s, blocks=%b" foo
> size=1048576, blocks=2

Thanks, that should be useful, then.

Max

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