--- /usr/src/sys.old/kern/subr_mbuf.c	Sat Nov 24 15:01:13 2001
+++ /usr/src/sys/kern/subr_mbuf.c	Sat Nov 24 16:47:59 2001
@@ -507,6 +507,8 @@
 	    how == M_TRYWAIT ? M_WAITOK : M_NOWAIT);
 	if (p == NULL) {
 		free(bucket, M_MBUF);
+		if (how == M_TRYWAIT)
+			mb_list->ml_mapfull = 1;
 		return (NULL);
 	}
 
@@ -618,7 +620,6 @@
 			 	   * we're willing to, but only after trying to
 				   * steal from other lists.
 				   */
-					mb_list->ml_mapfull = 1;
 					m = mb_alloc_wait(mb_list, type);
 				} else
 					/* XXX: No consistency. */