Re: White screen

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Mark Clarkson wrote:
> Hi,
> When using WinXP I get a completely white screen whenever I change the
> resolution and just before the Windows GUI comes up, which lasts for
> around 20 seconds. 

That is a known issue.  Windows is clearing the screen using mmio 
writes.  We have hacks to convert the mmio writes to regular RAM writes, 
but they aren't effective for the screen clearing.  It is likely 
fixable, just haven't gotten around to it.


> Also, as with Xen HVM, network performance is poor,
> although it seems to be faster than WinXP under Xen. Do you expect
> network performance to be good enough for server use in a guest in the
> future, maybe once the MMU has been improved, or will you go the same
> route as Xen and provide non-free guest network drivers?
>   

We intend, at first, to improve fully virtualized performance as far as 
we are able, without resorting to paravirtualized drivers.

Should performance not be satisfactory to our needs, we may write 
paravirtualized devices and drivers.  If we do so, I can't commit as to 
whether the paravirtualized Windows drivers will be open or not (I'm not 
saying the drivers will be closed -- just that no decision has been made).

However, if you (or anyone) is interested in writing paravirtulized 
drivers, we will work with you towards merging them into the kernel and 
into the kvm distribution.  We welcome such contributions and will 
cooperate fully.


-- 
error compiling committee.c: too many arguments to function


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