Commit cb19833d authored by Tejun Heo's avatar Tejun Heo Committed by Jens Axboe
Browse files

[BLOCK] kill generic max_back_kb handling 



This patch kills max_back_kb handling from elv_dispatch_sort() and
kills max_back_kb field from struct request_queue.

Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@suse.de>
parent 4c9f7836

drivers/block/elevator.c

+1 −5
Original line number Diff line number Diff line
@@ -136,7 +136,6 @@ static int elevator_attach(request_queue_t *q, struct elevator_type *e, 
	q->elevator = eq;

	q->end_sector = 0;

	q->boundary_rq = NULL;

	q->max_back_kb = 0;



	if (eq->ops->elevator_init_fn)

		ret = eq->ops->elevator_init_fn(q, eq);
@@ -227,15 +226,12 @@ void elevator_exit(elevator_t *e) 
void elv_dispatch_sort(request_queue_t *q, struct request *rq)

{

	sector_t boundary;

	unsigned max_back;

	struct list_head *entry;



	if (q->last_merge == rq)

		q->last_merge = NULL;



	boundary = q->end_sector;

	max_back = q->max_back_kb * 2;

	boundary = boundary > max_back ? boundary - max_back : 0;



	list_for_each_prev(entry, &q->queue_head) {

		struct request *pos = list_entry_rq(entry);

include/linux/blkdev.h

+0 −1
Original line number Diff line number Diff line
@@ -339,7 +339,6 @@ struct request_queue 
	 */

	sector_t		end_sector;

	struct request		*boundary_rq;

	unsigned int		max_back_kb;



	/*

	 * Auto-unplugging state