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-rw-r--r--include/linux/cgroup.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 64047ae7fde1..cda7eb2239e1 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -268,6 +268,9 @@ enum {
*
* - Remount is disallowed.
*
+ * - memcg: use_hierarchy is on by default and the cgroup file for
+ * the flag is not created.
+ *
* The followings are planned changes.
*
* - release_agent will be disallowed once replacement notification