diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 3ede56d6b3073c8e6f3b1afa24fe64ddb926b285..1938e69ad5cc3fae15d8f09dbd397684bebcfd24 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4556,6 +4556,53 @@ static void mem_cgroup_oom_unregister_event(struct mem_cgroup *memcg,
 	spin_unlock(&memcg_oom_lock);
 }
 
+static const char *const memcg_flag_name[] = {
+	"NO_REF",
+	"ONLINE",
+	"RELEASED",
+	"VISIBLE",
+	"DYING"
+};
+
+static void memcg_flag_stat_get(int mem_flags, int *stat)
+{
+	int i;
+	int flags = mem_flags;
+
+	for (i = 0; i < ARRAY_SIZE(memcg_flag_name); i++) {
+		if (flags & 1)
+			stat[i] += 1;
+		flags >>= 1;
+	}
+}
+
+static int memcg_flag_stat_show(struct seq_file *sf, void *v)
+{
+	int self_flag[ARRAY_SIZE(memcg_flag_name)];
+	int child_flag[ARRAY_SIZE(memcg_flag_name)];
+	int iter;
+	struct cgroup_subsys_state *child;
+	struct cgroup_subsys_state *css = seq_css(sf);
+
+	memset(self_flag, 0, sizeof(self_flag));
+	memset(child_flag, 0, sizeof(child_flag));
+
+	memcg_flag_stat_get(css->flags, self_flag);
+
+	rcu_read_lock();
+	css_for_each_child(child, css)
+		memcg_flag_stat_get(child->flags, child_flag);
+	rcu_read_unlock();
+
+	for (iter = 0; iter < ARRAY_SIZE(memcg_flag_name); iter++)
+		seq_printf(sf, "%s %d\n", memcg_flag_name[iter], self_flag[iter]);
+
+	for (iter = 0; iter < ARRAY_SIZE(memcg_flag_name); iter++)
+		seq_printf(sf, "CHILD_%s %d\n", memcg_flag_name[iter], child_flag[iter]);
+
+	return 0;
+}
+
 static int mem_cgroup_oom_control_read(struct seq_file *sf, void *v)
 {
 	struct mem_cgroup *memcg = mem_cgroup_from_seq(sf);
@@ -5259,6 +5306,10 @@ static struct cftype mem_cgroup_legacy_files[] = {
 		.write_u64 = mem_cgroup_oom_control_write,
 		.private = MEMFILE_PRIVATE(_OOM_TYPE, OOM_CONTROL),
 	},
+	{
+		.name = "flag_stat",
+		.seq_show = memcg_flag_stat_show,
+	},
 	{
 		.name = "pressure_level",
 	},