diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index a83e039..6ceb6f2 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -177,6 +177,9 @@
 
 	unsigned int	swappiness;
 
+	/* set when res.limit == memsw.limit */
+	bool		memsw_is_minimum;
+
 	/*
 	 * statistics. This must be placed at the end of memcg.
 	 */
@@ -847,6 +850,10 @@
 	int ret, total = 0;
 	int loop = 0;
 
+	/* If memsw_is_minimum==1, swap-out is of-no-use. */
+	if (root_mem->memsw_is_minimum)
+		noswap = true;
+
 	while (loop < 2) {
 		victim = mem_cgroup_select_victim(root_mem);
 		if (victim == root_mem)
@@ -1752,6 +1759,12 @@
 			break;
 		}
 		ret = res_counter_set_limit(&memcg->res, val);
+		if (!ret) {
+			if (memswlimit == val)
+				memcg->memsw_is_minimum = true;
+			else
+				memcg->memsw_is_minimum = false;
+		}
 		mutex_unlock(&set_limit_mutex);
 
 		if (!ret)
@@ -1799,6 +1812,12 @@
 			break;
 		}
 		ret = res_counter_set_limit(&memcg->memsw, val);
+		if (!ret) {
+			if (memlimit == val)
+				memcg->memsw_is_minimum = true;
+			else
+				memcg->memsw_is_minimum = false;
+		}
 		mutex_unlock(&set_limit_mutex);
 
 		if (!ret)