Re: [Qemu-devel] [qemu-s390x] [PULL 2/2] iotests: simple mirror test with kvm on 1G image

[Vladimir Sementsov-Ogievskiy]

05.12.2018 12:01, Christian Borntraeger wrote:
> 
> 
> On 05.12.2018 09:46, Kevin Wolf wrote:
>> Am 05.12.2018 um 09:23 hat Christian Borntraeger geschrieben:
>>>>>> +# prepare source image
>>>>>> +qemu_img_create('-f', iotests.imgfmt, '-o', 'preallocation=metadata', 
>>>>>> disk,
>>>>>> +                str(size))
>>>>>> +
>>>>>> +vm = QEMUMachine(iotests.qemu_prog)
>>>>>> +vm.add_args('-machine', 'pc,accel=kvm')
>>>
>>> This (pc) clearly does not work on other architectures.
>>> In addition to that, I also need to add -no-shutdown on s390 (see 068 for a 
>>> similar case)
>>
>> Leaving out pc definitely makes sense, and the bug still reproduces for
>> me without it.
>>
>> I don't understand the -no-shutdown, though. Already for 068, neither
>> the code nor the commit message when it was added explain why this is
>> needed.
>>
>> Can you turn this into a proper patch and add a comment why -no-shutdown
>> is needed?
> 
> I already sent this patch. The reason is that there is no BIOS in a classical 
> sense
> on s390x. If no bootable image (external kernel or from disk) is found, the 
> small boot
> bios loads a disabled wait PSW. The default action for that is then shutdown.
> 

Is it an option for you just drop the whole line "vm.add_args('-machine', 
'pc,accel=kvm')"?
The problem without it for me was that gdb failed to produce full and nice 
backtrace, but
test worked anyway

-- 
Best regards,
Vladimir