Re: Re: More virtio users

[Markus Armbruster <armbru@redhat.com>]

Rusty Russell <rusty@rustcorp.com.au> writes:

> On Sun, 2007-06-10 at 10:33 +0300, Avi Kivity wrote:
>> It is worthwhile, when designing virtio, to keep in mind as many 
>> possible users as possible.  In addition to block and net, I see at 
>> least the following:
[...]
> Framebuffer is an interesting one.  Virtio doesn't assume shared memory,
> so naively the fb you would just send outbufs describing changed memory.
> This would work, but describing rectangles is better.  A helper might be
> the right approach here

Wouldn't that be slow?  Xen's PV framebuffer tracks dirty areas with
page granularity.

> Lguest doesn't have a framebuffer, so maybe this is a good thing for me
> to hack on, but I promised myself I'd finish NAPI for the net device,
> and tag for block device first.

That would be nice.  It usually takes more than one implementation to
get an abstraction right.