"Michael S. Tsirkin" [off-list ref] writes:

On Thu, Jan 10, 2013 at 09:00:55PM +1030, Rusty Russell wrote:

quoted

Not sure why vhost/net doesn't built a packet and feed it in
netif_rx_ni().  This is what tun seems to do, and with this code it
should be fairly optimal.

Because we want to use NAPI.

Not quite what I was asking; it was more a question of why we're using a
raw socket, when we trivially have a complete skb already which we
should be able to feed to Linux like any network packet.

And that path is pretty well optimized...

Cheers,
Rusty.