Re: [Xen-devel] [RFC] PVFB: Add refresh period to XenStore parameters?

[Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>]

Hello,

Getting back to that old issue.

Samuel Thibault, le Tue 04 Mar 2008 16:12:20 +0000, a écrit :
> > * If the frontend can track changes efficiently, it sends update
> >   messages to the backend, which can use them to only redisplay
> >   changed areas.
> 
> Well, that was actually my next target :)
> (but for that we badly need the resize/redepth support).
> 
> However, that doesn't solve something that still bugs me, which is
> that the VGA emulation layer wakes up every 30ms to just notice that
> the width/height/depth registers didn't change etc. even if the actual
> window is not shown.

What could be done is to make the backend set request-update to 0 when
the window is minimized, which makes the frontend understand that there
is temporarily no need to send updates any more, and set it back to 1
when the window is restored.  Would that be OK?

Samuel

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