Re: [Qemu-devel] [RFC v3 0/8] Fix QEMU crash during memory hotplug with vhost=on

[Andrey Korolyov]

On Wed, Jul 15, 2015 at 6:18 PM, Igor Mammedov <address@hidden> wrote:
> On Thu, 9 Jul 2015 20:04:35 +0300
> Andrey Korolyov <address@hidden> wrote:
>
>> On Wed, Jul 8, 2015 at 6:46 PM, Igor Mammedov <address@hidden> wrote:
>> > On Wed, 8 Jul 2015 13:01:05 +0300
>> > "Michael S. Tsirkin" <address@hidden> wrote:
>> >
>> > [...]
>> >> - this fixes qemu on current kernels, so it's a bugfix
>> >>
>> >> - this changes the semantics of memory hot unplug slightly
>> >>   so I think it's important to merge in 2.4 before we
>> >>   release qemu with memory hot unplug, this way we
>> >>   won't have to maintain old semantics forever
>> > concerning semantic change, I've just chatted with Peter
>> > who implemented libvirt side of the memory hotplug stack.
>> > And it's not a problem for libvirt since it always does
>> > unplug dimm -> remove backend sequence.
>> >
>> >
>>
>>
>> Just for the record - top of the series somehow fixed mysterious guest
>> memory corruption issue described in
>> https://lists.gnu.org/archive/html/qemu-devel/2015-06/msg03117.html
>> which existed right from a moment of a memory hotplug introduction, I
>> checked series for its disappearance only with vhost for now.  Thanks
>> Igor!
> just to be sure which patch exactly fixed issue for you?
>

Had not bisected this yet, 2.3 is fairly distant from mine production
yet... will post a result today or tomorrow. Until then, I`ll be
absolutely out of clues of what was behind mentioned corruption.