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

[Andrey Korolyov]

On Thu, Sep 4, 2014 at 8:38 PM, Marcelo Tosatti <address@hidden> wrote:
> On Sun, Aug 24, 2014 at 10:51:38PM +0400, Andrey Korolyov wrote:
>> 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
>
> Andrey,
>
> What patch is this again ?
>
>

It is attached to the message which has a highest quoting order above
1), basically it is a monkey adaptation of newer ioapic patches for
3.10. RH kernel includes them, so Centos7/RH7 users should not observe
reported problem.

[1] https://www.mail-archive.com/address@hidden/msg252526.html

Using the opportunity - what are plans, if there are any, to revive
agraf`s patch which was the reason of an initial issue in this thread?
The Windows issue is most probably unrelated to it and I`d be happy to
check patch proposals because there are a lot of suffering with VMs
with large uptime and live migration when negative time shift appears.