Index: sys/vm/vm_kern.c
===================================================================
--- sys/vm/vm_kern.c	(wersja 207141)
+++ sys/vm/vm_kern.c	(kopia robocza)
@@ -469,6 +469,12 @@
 			swap_release(size);
 			return (0);
 		}
+		vm_map_unlock(map);
+		/* Before going to sleep inform abusers about our problems. */
+		EVENTHANDLER_INVOKE(vm_lowmem, 0);
+		vm_map_lock(map);
+		if (vm_map_findspace(map, vm_map_min(map), size, &addr) == 0)
+			break;
 		map->needs_wakeup = TRUE;
 		vm_map_unlock_and_wait(map, 0);
 	}