1 files changed, 12 insertions, 0 deletions

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 83f18a1d9d10..a76cdd160277 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -638,6 +638,11 @@ static void bdi_wb_init(struct bdi_writeback *wb, struct backing_dev_info *bdi)
         setup_timer(&wb->wakeup_timer, wakeup_timer_fn, (unsigned long)bdi);
 }
 
+/*
+ * Initial write bandwidth: 100 MB/s
+ */
+#define INIT_BW         (100 << (20 - PAGE_SHIFT))
+
 int bdi_init(struct backing_dev_info *bdi)
 {
         int i, err;
@@ -660,6 +665,13 @@ int bdi_init(struct backing_dev_info *bdi)
         }
 
         bdi->dirty_exceeded = 0;
+
+        bdi->bw_time_stamp = jiffies;
+        bdi->written_stamp = 0;
+
+        bdi->write_bandwidth = INIT_BW;
+        bdi->avg_write_bandwidth = INIT_BW;
+
         err = prop_local_init_percpu(&bdi->completions);
 
         if (err) {