--- wikisrc/ports/xen/howto.mdwn	2016/12/20 19:37:13	1.129
+++ wikisrc/ports/xen/howto.mdwn	2016/12/20 19:47:35	1.130
@@ -148,10 +148,11 @@ variable.
 
 With xl, virtual devices are configured in parallel, which can cause
 problems if they are written assuming serial operation (e.g., updating
-firewall rules without explicit locking).
-
-There is now locking for xl startup, but as of 201612 it has not been
-adequately tested.
+firewall rules without explicit locking).  There is now locking for
+the provided scripts, which works for normal casses (e.g, file-backed
+xbd, where a vnd must be allocated).  But, as of 201612, it has not
+been adequately tested for a complex custom setup with a large number
+of interfaces.
 
 NetBSD
 ------