--- src/sys/i386/i386/Attic/pmap.c	2006/05/25 04:17:07	1.55
+++ src/sys/i386/i386/Attic/pmap.c	2006/09/12 22:03:10	1.56
@@ -2375,6 +2375,12 @@ pmap_prefault(pmap_t pmap, vm_offset_t a
 	vm_page_t m, mpte;
 	vm_object_t object;
 
+	/*
+	 * We do not currently prefault mappings that use virtual page
+	 * tables.  We do not prefault foreign pmaps.
+	 */
+	if (entry->maptype == VM_MAPTYPE_VPAGETABLE)
+		return;
 	if (!curproc || (pmap != vmspace_pmap(curproc->p_vmspace)))
 		return;