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

[Marcelo Tosatti]

On Fri, Aug 22, 2014 at 04:05:07PM -0300, Marcelo Tosatti wrote:
> On Fri, Aug 22, 2014 at 10:39:38PM +0400, Andrey Korolyov wrote:
> > On Fri, Aug 22, 2014 at 9:45 PM, Marcelo Tosatti <address@hidden> wrote:
> > > On Fri, Aug 22, 2014 at 08:44:53PM +0400, Andrey Korolyov wrote:
> > >> >
> > >> > I`m running 3.10, so patches are not here, will try 3.16 soon. Even if
> > >> > problem will be fixed, it still will be specific for 2.1, earlier
> > >> > releases working well and I`ll bisect at a time.
> > >>
> > >> Thanks, using 3.16 helped indeed. Though the bug remains as is at 2.1
> > >> on LTS 3.10, should I find the breaking commit, or it is better to
> > >> backport kvm subsystem changes related to apic to 3.10?
> > >
> > > Andrey,
> > >
> > > Can you try the patchset (which includes cpu_clean_all_dirty) please?
> > > It should be equivalent to your proposed patch.
> > >
> > >
> > 
> > 
> > Just checked case for Windows, bug is still here (twelve continuous
> > ping-pong migrations between two hosts). Also there is very weird
> > observation that the if VM stalled, password window renders in a
> > cripple way just after connection when no VNC region refreshes are
> > made yet by mouse, vm-is-alive case rendering after-c-a-d prompt
> > properly. Probably it`ll be easier to check behaviour against Paolo`
> > patchset for RH kernel, though I`m still in progress with cutting out
> > the rest to adapt them on top of bare 3.10, for ones with access to
> > git log it should be easier :)
> 
> Argh i forgot cpu_sync_all_states. Will resend shortly.

Well, can you add cpu_synchronize_all_states() before 
the cpu_clean_all_dirty() call and retry?

Sorry.