Re: [Xen-devel] xend leaks/bugs/etc

[Anthony Liguori <aliguori@xxxxxxxxxx>]

Jacob Gorm Hansen wrote:

> Hollis Blanchard wrote:
>
> > When the ring queue overflows, console data will be dropped, which is
> > significant. I notice you avoided the subject of a shared-memory video
> > protocol: in that case, dropped data could leave parts of the screen
> > obsolete.
>
> The same thing happens on a VGA console today, lets not make things 
> harder in Xen than they are in real life. If you want to be sure that 
> you see everything (human operator reading bandwidth is also fairly 
> limited btw.) setup a system which logs stuff to a file inside the VM.
It's a bit more complex it we every support 3D acceleration.  We can't 
really throttle that without losing portion of whatevers drawn.  For a 
normal, non-acceleration 2D shared-memory video driver, I imagine it 
will look a lot like RFB so it will be very easy to control how much 
work dom0 has to do without losing any quality.
> Jacob

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