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

[Andrey Korolyov]

On Sun, Aug 24, 2014 at 8:57 PM, Andrey Korolyov <address@hidden> wrote:
> On Sun, Aug 24, 2014 at 8:35 PM, Paolo Bonzini <address@hidden> wrote:
>> Il 24/08/2014 18:19, Andrey Korolyov ha scritto:
>>> Sorry, I was a bit inaccurate in my thoughts at Fri about necessary
>>> amount of work, patch lays perfectly on 3.10 with bit of monkey
>>> rewrites. The attached one fixed problem for me - it represents
>>> 0b10a1c87a2b0fb459baaefba9cb163dbb8d3344,
>>> 0bc830b05c667218d703f2026ec866c49df974fc,
>>> 44847dea79751e95665a439f8c63a65e51da8e1f and
>>> 673f7b4257a1fe7b181e1a1182ecc2b6b2b795f1.
>>
>> So, with these changes, Marcelo's patch does not hang up your guest anymore?
>>
>> Paolo
>>
>
> If I may reword, Marcelo`s proposed states sync with revert-revert of
> agraf`s patch, does not break anything for Windows (migration works
> well for any variant of emulator with modified kernel modules). Let me
> check if initially reported issue (lost I/O interrupts) is gone for
> the current situation (patched kernel plus Marcelo` patch).


patched kernel + any 2.1 variant + Windows = works
patched kernel + patched 2.1 + Linux + disk workload = works fine
bare kernel + any 2.1 variant + Windows = disk stale
bare kernel + proposed patch from Marcelo + Linux + disk workload =
works fine (bare kernel + 2.1 release works at this point as tested
earlier)


Also guest 3.10.52 caused literally a rain of WTFs crashing emulator
with an emulation error in every case tested with live migration...
3.10.11 works fine. There will be another report soon I suppose though
it is nearly impossible to do a proper bisection in a sane time.