Re: [Qemu-devel] [PATCH 2/2] qxl: add QXL_IO_UPDATE_MEM for guest S3&S4 support

[Alon Levy]

On Mon, Jun 20, 2011 at 04:07:59PM +0200, Gerd Hoffmann wrote:
> >>What is the difference to one worker->stop() + worker->start() cycle?
> >>
> >
> >ok, stop+start won't disconnect any clients either. But does stop render all 
> >waiting commands?
> >I'll have to look, I don't know if it does.
> 
> It does.  This is what qemu uses to flush all spice server state to
> device memory on migration.
> 
> What is the reason for deleting all surfaces?

Making sure all references are dropped to pci memory in devram. We would need 
to recreate all
the surfaces after reset anyway.

> 
> cheers,
>   Gerd
>