Re: [PATCH 2/2] vhost_net: a kernel-level virtio server

[Anthony Liguori]

Arnd Bergmann wrote:
> > As I pointed out earlier, most code in virtio net is asymmetrical: guest
> > provides buffers, host consumes them.  Possibly, one could use virtio
> > rings in a symmetrical way, but support of existing guest virtio net
> > means there's almost no shared code.
> >     
>
> The trick is to swap the virtqueues instead. virtio-net is actually
> mostly symmetric in just the same way that the physical wires on a
> twisted pair ethernet are symmetric (I like how that analogy fits).
>   

It's already been done between two guests.  See 
http://article.gmane.org/gmane.linux.kernel.virtualization/5423

Regards,

Anthony Liguori
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