---

yaml
---
r: 38123
b: refs/heads/master
c: f022b2f
h: refs/heads/master
i:
  38121: 97103bd
  38119: d6cace3
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0d12922823408b26f83b15cae4a4feff4bd22f28
+refs/heads/master: f022b2fddd97795bc9333ffb6862eacfa95c6a95

trunk/drivers/md/raid5.c

@@ -2593,6 +2593,24 @@ static int raid5_issue_flush(request_queue_t *q, struct gendisk *disk,
 	return ret;
 }
 
+static int raid5_congested(void *data, int bits)
+{
+	mddev_t *mddev = data;
+	raid5_conf_t *conf = mddev_to_conf(mddev);
+
+	/* No difference between reads and writes.  Just check
+	 * how busy the stripe_cache is
+	 */
+	if (conf->inactive_blocked)
+		return 1;
+	if (conf->quiesce)
+		return 1;
+	if (list_empty_careful(&conf->inactive_list))
+		return 1;
+
+	return 0;
+}
+
 static int make_request(request_queue_t *q, struct bio * bi)
 {
 	mddev_t *mddev = q->queuedata;
@@ -3296,6 +3314,9 @@ static int run(mddev_t *mddev)
 
 	mddev->queue->unplug_fn = raid5_unplug_device;
 	mddev->queue->issue_flush_fn = raid5_issue_flush;
+	mddev->queue->backing_dev_info.congested_fn = raid5_congested;
+	mddev->queue->backing_dev_info.congested_data = mddev;
+
 	mddev->array_size =  mddev->size * (conf->previous_raid_disks -
 					    conf->max_degraded);