1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 9ca241a70c49..dff0ff78e878 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -75,10 +75,17 @@ struct backing_dev_info {
         struct percpu_counter bdi_stat[NR_BDI_STAT_ITEMS];
 
         unsigned long bw_time_stamp;    /* last time write bw is updated */
+        unsigned long dirtied_stamp;
         unsigned long written_stamp;    /* pages written at bw_time_stamp */
         unsigned long write_bandwidth;  /* the estimated write bandwidth */
         unsigned long avg_write_bandwidth; /* further smoothed write bw */
 
+        /*
+         * The base dirty throttle rate, re-calculated on every 200ms.
+         * All the bdi tasks' dirty rate will be curbed under it.
+         */
+        unsigned long dirty_ratelimit;
+
         struct prop_local_percpu completions;
         int dirty_exceeded;