Re: [Qemu-devel] Re: [PATCH v2 4/9] provide in-kernel apic

[Glauber Costa]

On Fri, Oct 09, 2009 at 11:06:41AM +0100, Jamie Lokier wrote:
> Glauber Costa wrote:
> > > It ensures the two models are compatible.  Since they're the same device  
> > > from the point of view of the guest, there's no reason for them to have  
> > > different representations or to be incompatible.
> > 
> > live migration between something that has in-kernel irqchip and
> > something that has not is likely to be a completely untested
> > thing. And this is the only reason we might think of it as the same
> > device. I don't see any value in supporting this combination
> 
> Not just live migration.  ACPI sleep + savevm + loadvm + ACPI resume,
> for example.
Yes, but in this case too, I'd expect the irqchipness of qemu not to change.