diff --git a/mm/swap_cgroup.c b/mm/swap_cgroup.c
index 454d6d7..3405b4e 100644
--- a/mm/swap_cgroup.c
+++ b/mm/swap_cgroup.c
@@ -204,6 +204,8 @@
 			struct page *page = map[i];
 			if (page)
 				__free_page(page);
+			if (!(i % SWAP_CLUSTER_MAX))
+				cond_resched();
 		}
 		vfree(map);
 	}