Re: [Qemu-devel] latest rc: virtio-blk hangs forever after migration

[Andrey Korolyov]

On Sat, Aug 9, 2014 at 10:35 AM, Paolo Bonzini <address@hidden> wrote:
>
>> > Yeah, I need to sit down and look at the code more closely...  Perhaps a
>> > cpu_mark_all_dirty() is enough.
>>
>> Hi Paolo,
>>
>> cpu_clean_all_dirty, you mean? Has the same effect.
>>
>> Marcin's patch to add cpu_synchronize_state_always() has the same
>> effect.
>>
>> What do you prefer ?
>
> I'd prefer cpu_clean_all_dirty because you can call it from the APIC
> load functions.  The bug with your patch is due to the APIC and to
> migration, it's not in the way your patch touches the kvmclock
> vmstate_change_handler.
>
> Paolo

Hello,


JFYI - Windows showing the same behavior after migration using bare
2.1 (frozen disk with latest virtio block drivers). Reverting agraf`s
patches back plus Marcin`s fix saves the situation, so AFAICS problem
is critical to M$ products on KVM.