Re: [Qemu-devel] [RFC v4 00/58] Memory API

[Avi Kivity]

On 07/20/2011 07:10 PM, Michael S. Tsirkin wrote:
> >  and vga could do it if the vnc display
> >  is disconnected, or if the update rate is so high it can just assume
> >  all memory is dirty.
>
> Yes, but it's not something *devices* should be doing.

No one knows about the frame buffer except the vga device.

> >  >What devices seem to need, instead, is enable/disable a region
> >  >through a back channel.
> >
> >  What do you mean?
>
> At least for qxl, all it seems to do is enable/disable
> logging when the region is enabled disabled.
> I'm not sure I follow what does vmware do - something
> similar only with a custom register instead of
> the standard memory enable?

pv vga like vmware and qxl disables logging when the pv interface is active.

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