Index: sys/vm/vm_pageout.c
===================================================================
--- sys/vm/vm_pageout.c
+++ sys/vm/vm_pageout.c
@@ -1281,6 +1281,7 @@
 		refs = object->ref_count != 0 ? pmap_ts_referenced(m) : 0;
 
 		old = vm_page_astate_load(m);
+		ps_delta = 0;
 		do {
 			/*
 			 * Check to see if the page has been removed from the