Index: head/sys/vm/swap_pager.c
===================================================================
--- head/sys/vm/swap_pager.c
+++ head/sys/vm/swap_pager.c
@@ -590,6 +590,7 @@
 	if (n < n2)
 		printf("Swap blk zone entries changed from %lu to %lu.\n",
 		    n2, n);
+	/* absolute maximum we can handle assuming 100% efficiency */
 	swap_maxpages = n * SWAP_META_PAGES;
 	swzone = n * sizeof(struct swblk);
 	if (!uma_zone_reserve_kva(swpctrie_zone, n))
@@ -2250,17 +2251,12 @@
 static void
 swapon_check_swzone(void)
 {
-	unsigned long maxpages, npages;
 
-	npages = swap_total;
-	/* absolute maximum we can handle assuming 100% efficiency */
-	maxpages = uma_zone_get_max(swblk_zone) * SWAP_META_PAGES;
-
 	/* recommend using no more than half that amount */
-	if (npages > maxpages / 2) {
+	if (swap_total > swap_maxpages / 2) {
 		printf("warning: total configured swap (%lu pages) "
 		    "exceeds maximum recommended amount (%lu pages).\n",
-		    npages, maxpages / 2);
+		    swap_total, swap_maxpages / 2);
 		printf("warning: increase kern.maxswzone "
 		    "or reduce amount of swap.\n");
 	}