[adding qemu-block]

On 10/13/2017 02:37 AM, Vladimir Sementsov-Ogievskiy wrote:
> 077 is unrelated to backup, it's already broken test:
> 
> i=1; while check -nbd 077; do echo $((i++)) - OK; done; echo $i - FAIL
> 
> failed on 3rd try for me on master
> 

>> 077         - output mismatch (see 077.out.bad)
>> --- /tmp/qemu-test/src/tests/qemu-iotests/077.out    2017-10-12
>> 14:02:13.000000000 +0000
>> +++ /tmp/qemu-test/build/tests/qemu-iotests/077.out.bad    2017-10-12
>> 14:29:25.909887675 +0000
>> @@ -40,9 +40,9 @@
>>   wrote XXX/XXX bytes at offset XXX
>>   XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>>   blkdebug: Resuming request 'B'
>> +blkdebug: Resuming request 'A'
>>   wrote XXX/XXX bytes at offset XXX
>>   XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>> -blkdebug: Resuming request 'A'
>>   wrote XXX/XXX bytes at offset XXX
>>   XXX bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>>   wrote XXX/XXX bytes at offset XXX

Looks like we have a data race. Kevin, you wrote this test, any ideas on
how we can make it more robust?

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org