1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 5047355b9a0f..09f1a1408ae0 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -272,6 +272,8 @@ enum {
          * - memcg: use_hierarchy is on by default and the cgroup file for
          *   the flag is not created.
          *
+         * - blkcg: blk-throttle becomes properly hierarchical.
+         *
          * The followings are planned changes.
          *
          * - release_agent will be disallowed once replacement notification