--- vm_fault.c.dist	Sat Aug  5 07:31:11 2000
+++ vm_fault.c	Fri Feb 23 02:02:19 2001
@@ -804,6 +804,10 @@
 			}
 			vm_page_dirty(fs.m);
 			vm_pager_page_unswapped(fs.m);
+		} else {
+			if ((fs.entry->eflags & MAP_ENTRY_NOSYNC) && 
+					(fs.m->dirty == 0))
+				vm_page_flag_set(fs.m, PG_NOSYNC);
 		}
 	}