I imagine that someone previously has looked into putting zbuf (zero-copy
mbufs) support into NetBSD.  I am interested in knowing what the state of
the project is.   A search of the net reveals little except for VxWorks
support for zbufs.  

I would think that the MMU, socket syscalls, and mbuf code would need to be
modified.  The upside is that zbufs provide a network performance advantage.

Kyle

PS Opinions are my own and not that of L-3 communications.
_____________________________________________
Kyle Unice
L-3 Communications / Communication Systems - West
Advanced Network Engineering
640 North 2200 West 
P.O.Box 16850
Salt Lake City, UT  84116

Voice: (801) 594-2687
Fax: (801) 594-3269