From: Tejun Heo <htejun@gmail.com>
Date: Thu, 10 Nov 2005 07:48:21 +0000 (+0100)
Subject: [BLOCK] elevator: run queue in elevator_switch
X-Git-Tag: v2.6.15-rc2~229
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=407df2aa29a33fe16f6ee4bac8cdfa414783b9f1;p=platform%2Fkernel%2Flinux-3.10.git

[BLOCK] elevator: run queue in elevator_switch

elevator_dispatch needs to run queue after forced dispatching;
otherwise, the queue might stall.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
---

diff --git a/block/elevator.c b/block/elevator.c
index e58928e8..a475b1a 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -696,6 +696,8 @@ static void elevator_switch(request_queue_t *q, struct elevator_type *new_e)
 		;
 
 	while (q->rq.elvpriv) {
+		blk_remove_plug(q);
+		q->request_fn(q);
 		spin_unlock_irq(q->queue_lock);
 		msleep(10);
 		spin_lock_irq(q->queue_lock);