Re: [Qemu-devel] [SeaBIOS] [PATCH] don't expose pvpanic device in the UI

[Stefan Hajnoczi]

On Tue, Aug 06, 2013 at 02:45:48PM +0200, Andreas Färber wrote:
> Am 06.08.2013 14:09, schrieb Michael S. Tsirkin:
> > On Tue, Aug 06, 2013 at 01:03:34PM +0200, Andreas Färber wrote:
> >> FWIW -M q35 does not create all Q35 devices, there's -readconfig
> >> docs/q35-chipset.cfg for the rest. The criteria certainly is not
> >> migratability, since ICH9 AHCI (part of -M q35) is unmigratable,
> >> unfortunately.
> > 
> > Wasn't this fixed recently?
> 
> Not in qemu.git at least, that's why I couldn't test PCIe migration with
> q35 recently and resorted to picking random devices into i440fx.
> 
> Jason had added a VMStateDescription with fields extending my initial
> work, but it is .unmigratable = 1 /* Still buggy under I/O load */.

I haven't read the whole discussion but the recent AHCI fix I'm aware of
is making FLUSH commands work correctly.  That wasn't specifically aimed
at fixing migration.

Stefan