Re: s390x TCG migration failure

[Thomas Huth <thuth@redhat.com>]

On 29/03/2023 08.36, Thomas Huth wrote:
> On 29/03/2023 00.21, Nina Schoetterl-Glausch wrote:
>> On Tue, 2023-03-28 at 15:01 +0200, Thomas Huth wrote:
>>> On 24/03/2023 19.41, Nina Schoetterl-Glausch wrote:
>>>> Hi,
>>>>
>>>> We're seeing failures running s390x migration kvm-unit-tests tests with 
>>>> TCG.
>>>> Some initial findings:
>>>> What seems to be happening is that after migration a control block 
>>>> header accessed by the test code is all zeros which causes an unexpected 
>>>> exception.
>>>> I did a bisection which points to c8df4a7aef ("migration: Split 
>>>> save_live_pending() into state_pending_*") as the culprit.
>>>> The migration issue persists after applying the fix e264705012 
>>>> ("migration: I messed state_pending_exact/estimate") on top of c8df4a7aef.
>>>
>>>    Hi Nina,
>>>
>>> could you please open a ticket in the QEMU bug tracker and add the "8.0"
>>> label there, so that it correctly shows up in the list of things that should
>>> be fixed before the 8.0 release?
>>
>> https://gitlab.com/qemu-project/qemu/-/issues/1565 
> 
> Thanks!

Ping!

Juan, did you have a chance to look at this issue yet? ... we're getting 
quite close to the 8.0 release, and IMHO this sounds like a critical bug?

  Thomas