1 files changed, 8 insertions, 0 deletions

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index f3b44a65fc7a..cafcd7431189 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -737,6 +737,14 @@ struct cgroup_subsys blkio_subsys = {
         .subsys_id = blkio_subsys_id,
         .base_cftypes = blkcg_files,
         .module = THIS_MODULE,
+
+        /*
+         * blkio subsystem is utterly broken in terms of hierarchy support.
+         * It treats all cgroups equally regardless of where they're
+         * located in the hierarchy - all cgroups are treated as if they're
+         * right below the root.  Fix it and remove the following.
+         */
+        .broken_hierarchy = true,
 };
 EXPORT_SYMBOL_GPL(blkio_subsys);