### Diffstat output
 ./drivers/md/raid5.c |   13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff .prev/drivers/md/raid5.c ./drivers/md/raid5.c
--- .prev/drivers/md/raid5.c	2008-01-11 15:01:14.000000000 +1100
+++ ./drivers/md/raid5.c	2008-01-14 12:24:07.000000000 +1100
@@ -3157,7 +3157,8 @@ static void raid5_activate_delayed(raid5
 				atomic_inc(&conf->preread_active_stripes);
 			list_add_tail(&sh->lru, &conf->handle_list);
 		}
-	}
+	} else
+		blk_plug_device(conf->mddev->queue);
 }
 
 static void activate_bit_delay(raid5_conf_t *conf)
@@ -3547,7 +3548,7 @@ static int make_request(struct request_q
 				goto retry;
 			}
 			finish_wait(&conf->wait_for_overlap, &w);
-			handle_stripe(sh, NULL);
+			set_bit(STRIPE_HANDLE, &sh->state);
 			release_stripe(sh);
 		} else {
 			/* cannot get stripe for read-ahead, just give-up */
@@ -3890,7 +3891,7 @@ static int  retry_aligned_read(raid5_con
  * During the scan, completed stripes are saved for us by the interrupt
  * handler, so that they will not have to wait for our next wakeup.
  */
-static void raid5d (mddev_t *mddev)
+static void raid5d(mddev_t *mddev)
 {
 	struct stripe_head *sh;
 	raid5_conf_t *conf = mddev_to_conf(mddev);
@@ -3915,12 +3916,6 @@ static void raid5d (mddev_t *mddev)
 			activate_bit_delay(conf);
 		}
 
-		if (list_empty(&conf->handle_list) &&
-		    atomic_read(&conf->preread_active_stripes) < IO_THRESHOLD &&
-		    !blk_queue_plugged(mddev->queue) &&
-		    !list_empty(&conf->delayed_list))
-			raid5_activate_delayed(conf);
-
 		while ((bio = remove_bio_from_retry(conf))) {
 			int ok;
 			spin_unlock_irq(&conf->device_lock);