--- wikisrc/ports/xen/howto.mdwn	2015/03/04 01:32:16	1.91
+++ wikisrc/ports/xen/howto.mdwn	2015/03/04 01:36:07	1.92
@@ -809,6 +809,14 @@ It is also desirable to add
 in rc.conf. This way, the domain will be properly shut down if
 `xm shutdown -R` or `xm shutdown -H` is used on the dom0.
 
+It is not strictly necessary to have a kernel (as /netbsd) in the domU
+filesystem.  However, various programs (e.g. netstat) will use that
+kernel to look up symbols to read from kernel virtual memory.  If
+/netbsd is not the running kernel, those lookups will fail.  (This is
+not really a Xen-specific issue, but because the domU kernel is
+obtained from the dom0, it is far more likely to be out of sync or
+missing with Xen.)
+
 Your domain should be now ready to work, enjoy.
 
 Creating an unprivileged Linux domain (domU)