[PATCH] md: define backing_dev_info.congested_fn for raid0 and linear
[linux-2.6.git] / drivers / md / linear.c
index b99c19c..c625ddb 100644 (file)
@@ -111,6 +111,19 @@ static int linear_issue_flush(request_queue_t *q, struct gendisk *disk,
        return ret;
 }
 
+static int linear_congested(void *data, int bits)
+{
+       mddev_t *mddev = data;
+       linear_conf_t *conf = mddev_to_conf(mddev);
+       int i, ret = 0;
+
+       for (i = 0; i < mddev->raid_disks && !ret ; i++) {
+               request_queue_t *q = bdev_get_queue(conf->disks[i].rdev->bdev);
+               ret |= bdi_congested(&q->backing_dev_info, bits);
+       }
+       return ret;
+}
+
 static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks)
 {
        linear_conf_t *conf;
@@ -269,6 +282,8 @@ static int linear_run (mddev_t *mddev)
        blk_queue_merge_bvec(mddev->queue, linear_mergeable_bvec);
        mddev->queue->unplug_fn = linear_unplug;
        mddev->queue->issue_flush_fn = linear_issue_flush;
+       mddev->queue->backing_dev_info.congested_fn = linear_congested;
+       mddev->queue->backing_dev_info.congested_data = mddev;
        return 0;
 }