Re: [PATCH] iotests: fix usage -machine accel= together with -accel option

[Vladimir Sementsov-Ogievskiy]

23.12.2019 11:39, Paolo Bonzini wrote:
> On 23/12/19 08:43, Vladimir Sementsov-Ogievskiy wrote:
>> diff --git a/vl.c b/vl.c
>> index 86474a55c9..9fb859969c 100644
>> --- a/vl.c
>> +++ b/vl.c
>> @@ -2779,7 +2779,7 @@ static void configure_accelerators(const char 
>> *progname)
>>           for (tmp = accel_list; !accel_initialised && tmp && *tmp; tmp++) {
>>               /*
>>                * Filter invalid accelerators here, to prevent obscenities
>> -             * such as "-machine accel=tcg,,thread=single".
>> +             * such as "-machine accel=tcg,thread=single".
> 
> The double comma is intentional.  Without the "if" below, the comma
> would be escaped and parsed as "-accel tcg,thread=single".

Ah, OK, than drop this chunk.

> 
>>                */
>>               if (accel_find(*tmp)) {
>>                   qemu_opts_parse_noisily(qemu_find_opts("accel"), *tmp, 
>> true);
>> diff --git a/tests/qemu-iotests/check b/tests/qemu-iotests/check
>> index 90970b0549..2890785a10 100755
>> --- a/tests/qemu-iotests/check
>> +++ b/tests/qemu-iotests/check
>> @@ -587,13 +587,13 @@ export QEMU_PROG="$(type -p "$QEMU_PROG")"
>>   
>>   case "$QEMU_PROG" in
>>       *qemu-system-arm|*qemu-system-aarch64)
>> -        export QEMU_OPTIONS="-nodefaults -display none -machine 
>> virt,accel=qtest"
>> +        export QEMU_OPTIONS="-nodefaults -display none -machine virt -accel 
>> qtest"
>>           ;;
>>       *qemu-system-tricore)
>> -        export QEMU_OPTIONS="-nodefaults -display none -machine 
>> tricore_testboard,accel=qtest"
>> +        export QEMU_OPTIONS="-nodefaults -display none -machine 
>> tricore_testboard -accel qtest"
>>           ;;
>>       *)
>> -        export QEMU_OPTIONS="-nodefaults -display none -machine accel=qtest"
>> +        export QEMU_OPTIONS="-nodefaults -display none -accel qtest"
>>           ;;
>>   esac
>>   
>>
> 
> This part is good, but what is the reproducer?
> 


For example, 30 iotest fails for me with a lot of
+======================================================================
+ERROR: test_stream (__main__.TestSmallerBackingFile)
+----------------------------------------------------------------------
+Traceback (most recent call last):
+  File "030", line 592, in setUp
+    self.vm.launch()
+  File 
"/work/src/qemu/master/tests/qemu-iotests/../../python/qemu/machine.py", line 
302, in launch
+    self._launch()
+  File 
"/work/src/qemu/master/tests/qemu-iotests/../../python/qemu/machine.py", line 
329, in _launch
+    self._post_launch()
+  File "/work/src/qemu/master/tests/qemu-iotests/../../python/qemu/qtest.py", 
line 110, in _post_launch
+    super(QEMUQtestMachine, self)._post_launch()
+  File 
"/work/src/qemu/master/tests/qemu-iotests/../../python/qemu/machine.py", line 
274, in _post_launch
+    self._qmp.accept()
+  File "/work/src/qemu/master/tests/qemu-iotests/../../python/qemu/qmp.py", 
line 157, in accept
+    return self.__negotiate_capabilities()
+  File "/work/src/qemu/master/tests/qemu-iotests/../../python/qemu/qmp.py", 
line 73, in __negotiate_capabilities
+    raise QMPConnectError
+qemu.qmp.QMPConnectError


and if I add -d, I see

+DEBUG:qemu.machine:Error launching VM
+DEBUG:qemu.machine:Command: 
'/work/src/qemu/master/tests/qemu-iotests/../../x86_64-softmmu/qemu-system-x86_64
 -display none -vga none -chardev 
socket,id=mon,path=/tmp/tmp.ANcscZnFct/qemu-23220-monitor.sock -mon 
chardev=mon,mode=control -qtest 
unix:path=/tmp/tmp.ANcscZnFct/qemu-23220-qtest.sock -accel qtest -nodefaults 
-display none -machine accel=qtest -drive 
if=virtio,id=drive0,file=blkdebug::/ramdisk/x3/test.img,format=qcow2,cache=writeback,backing.node-name=mid,backing.backing.node-name=base'
+DEBUG:qemu.machine:Output: 'qemu-system-x86_64: The -accel and "-machine 
accel=" options are incompatible\n'


Try just random three python tests: 132 202 203: all fails with same symptoms. 
(interesting that -d doesn't help for 202 and 203, but still they are fixed 
after this patch).

I expect that all python tests are broken.. Still I'm lazy to check all, let's 
just fix.


-- 
Best regards,
Vladimir