1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index dff0ff78e878..c3b92010d894 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -83,8 +83,11 @@ struct backing_dev_info {
         /*
          * The base dirty throttle rate, re-calculated on every 200ms.
          * All the bdi tasks' dirty rate will be curbed under it.
+         * @dirty_ratelimit tracks the estimated @balanced_dirty_ratelimit
+         * in small steps and is much more smooth/stable than the latter.
          */
         unsigned long dirty_ratelimit;
+        unsigned long balanced_dirty_ratelimit;
 
         struct prop_local_percpu completions;
         int dirty_exceeded;