diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 29d430885b1af469383acb27935f883ca420757b..7dc68b1792ef4605911206b056a3ecc589197897 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2232,7 +2232,8 @@ static void drain_all_stock(struct mem_cgroup *root_memcg)
 
 		rcu_read_lock();
 		memcg = stock->cached;
-		if (memcg && mem_cgroup_is_descendant(memcg, root_memcg))
+		if (memcg && stock->nr_pages &&
+		    mem_cgroup_is_descendant(memcg, root_memcg))
 			flush = true;
 		rcu_read_unlock();