From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Fri, 4 May 2012 00:10:24 +0300

Hmm we orphan skbs when we loop them back so how about reusing the
skb->destructor for this?

That's one possibility.

But I fear we're about to toss Ian into yet another rabbit hole. :-)

Let's try to converge on something quickly as I think integration of
his work has been delayed enough as-is.