Hi,
With my recent commits related to deferred interrupts, I no longer
see the network hangs I had previously under load for guests.
I've had a linux domU running a build.sh release along with a NetBSD domU
running a package bulk build, both using another NetBSD domU NFS server for
sources. This has been running for hours without problems, on a P4 with
hyperthreading enabled (xen seems to allocate the virtual CPUs statically
to domains).
So xen is starting to be useable for serious work :)

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--