--- Net2/vm/vm_kern.c	2018/04/24 18:03:57	1.1.1.1
+++ Net2/vm/vm_kern.c	2018/04/24 18:04:49	1.1.1.2
@@ -498,6 +498,7 @@ vm_offset_t kmem_alloc_wait(map, size)
 
 			assert_wait((int)map, TRUE);
 			vm_map_unlock(map);
+thread_wakeup(&vm_pages_needed); /* XXX */
 			thread_block();
 		}
 		else {