--- wikisrc/ports/xen/howto.mdwn	2014/12/26 20:28:45	1.50
+++ wikisrc/ports/xen/howto.mdwn	2014/12/26 23:36:34	1.51
@@ -204,7 +204,9 @@ alternately with little problems, simply
 Xen daemons when not running Xen.
 
 Note that NetBSD as dom0 does not support multiple CPUs.  This will
-limit the performance of the Xen/dom0 workstation approach.
+limit the performance of the Xen/dom0 workstation approach.  In theory
+the only issue is that the "backend drivers" are not yet MPSAFE:
+  http://mail-index.netbsd.org/netbsd-users/2014/08/29/msg015195.html
 
 Installation of NetBSD
 ----------------------