diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h
index 7d7fbe2..a6f8cc5 100644
--- a/include/linux/res_counter.h
+++ b/include/linux/res_counter.h

@@ -226,4 +226,6 @@ res_counter_set_soft_limit(struct res_counter *cnt,
 	return 0;
 }
 
+u64 res_counter_usage_safe(struct res_counter *cnt);
+
 #endif

diff --git a/kernel/res_counter.c b/kernel/res_counter.c
index ad581aa..e84149b 100644
--- a/kernel/res_counter.c
+++ b/kernel/res_counter.c

@@ -171,6 +171,21 @@ u64 res_counter_read_u64(struct res_counter *counter, int member)
 }
 #endif
 
+/*
+ * Returns usage. If usage > limit, limit is returned.
+ * This is useful not to break user experiance if the excess
+ * is temporal.

+ */
+u64 res_counter_usage_safe(struct res_counter *counter)
+{
+	u64 usage, limit;
+
+	limit = res_counter_read_u64(counter, RES_LIMIT);
+	usage = res_counter_read_u64(counter, RES_USAGE);
+
+	return min(usage, limit);
+}
+
 int res_counter_memparse_write_strategy(const char *buf,
 					unsigned long long *res)
 {

diff --git a/net/ipv4/tcp_memcontrol.c b/net/ipv4/tcp_memcontrol.c
index b6f3583..a73dce6 100644
--- a/net/ipv4/tcp_memcontrol.c
+++ b/net/ipv4/tcp_memcontrol.c

@@ -180,7 +180,7 @@ static u64 tcp_read_usage(struct mem_cgroup *memcg)
 		return atomic_long_read(&tcp_memory_allocated) << PAGE_SHIFT;
 
 	tcp = tcp_from_cgproto(cg_proto);
-	return res_counter_read_u64(&tcp->tcp_memory_allocated, RES_USAGE);
+	return res_counter_usage_safe(&tcp->tcp_memory_allocated);
 }
 
 static u64 tcp_cgroup_read(struct cgroup *cont, struct cftype *cft)