Re: [Qemu-devel] [RFC 5/7] qxl-render: call ppm_save on callback

[Alon Levy]

On Wed, Feb 22, 2012 at 03:22:11PM +0100, Gerd Hoffmann wrote:
>   Hi,
> 
> > Honestly, for this particular case, I'm not 100% sure that having an id is
> > _required_, as I don't expect a client to submit multiple screendump calls
> > in parallel and we don't "officially" support multiple QMP clients either.
> > Also, having the screendump filename in the event will serve as a form of
> > identifier too.
> 
> That is exactly my thinking, echo the filename written in the event.
> 
> > Btw, are you planning to add the event to the already existing screendump
> > command? Adding a new command that doesn't use the monitor async API and
> > is truly asynchronous wouldn't better?
> 
> Good question.  I'd tend to just let the existing command send trigger
> an event.  But libvirt needs some way to figure whenever it should wait
> for an event ...

Right, that's the second reason I think a new command is needed.
Additionally a new command can be implemented only by qxl and not by
anything else (although I guess that would be a NACK?)

> 
> cheers,
>   Gerd