Index: kern_mbuf.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/kern_mbuf.c,v
retrieving revision 1.9.2.8
diff -u -r1.9.2.8 kern_mbuf.c
--- kern_mbuf.c	16 May 2006 07:27:48 -0000	1.9.2.8
+++ kern_mbuf.c	25 Nov 2006 14:14:36 -0000
@@ -122,6 +122,7 @@
 		if (newnmbclusters > nmbclusters) {
 			nmbclusters = newnmbclusters;
 			uma_zone_set_max(zone_clust, nmbclusters);
+			uma_zone_set_max(zone_pack, nmbclusters / 2);
 			EVENTHANDLER_INVOKE(nmbclusters_change);
 		} else
 			error = EINVAL;
@@ -203,6 +204,9 @@
 	zone_pack = uma_zsecond_create(MBUF_PACKET_MEM_NAME, mb_ctor_pack,
 	    mb_dtor_pack, mb_zinit_pack, mb_zfini_pack, zone_mbuf);
 
+	if (nmbclusters > 0)
+		uma_zone_set_max(zone_pack, nmbclusters / 2);
+
 	/* Make jumbo frame zone too. Page size, 9k and 16k. */
 	zone_jumbop = uma_zcreate(MBUF_JUMBOP_MEM_NAME, MJUMPAGESIZE,
 	    mb_ctor_clust, mb_dtor_clust,