--- sys/kern/kern_module.c.orig	2009-04-15 05:14:26.000000000 +0200
+++ sys/kern/kern_module.c	2009-09-20 17:36:00.000000000 +0200
@@ -101,8 +101,11 @@
 		return;
 	mtx_lock(&Giant);
 	MOD_SLOCK;
-	TAILQ_FOREACH(mod, &modules, link)
+	TAILQ_FOREACH(mod, &modules, link) {
+	        printf(">>> module '%s'\n", mod->name == NULL ? "<NULL>" : mod->name);
 		MOD_EVENT(mod, MOD_SHUTDOWN);
+	        printf("<<< module return\n");
+        };
 	MOD_SUNLOCK;
 	mtx_unlock(&Giant);
 }