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blk-throttle: Use blk_plug in throttle dispatch

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Use plug in throttle dispatch also as we are dispatching a bunch of
bios in throttle context and some of them might merge.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Vivek Goyal 2011-03-09 08:27:37 +01:00 committed by Jens Axboe
parent 721a9602e6
commit 69d60eb96a
1 changed files with 3 additions and 0 deletions
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3
block/blk-throttle.c
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@ -770,6 +770,7 @@ static int throtl_dispatch(struct request_queue *q)
unsigned int nr_disp = 0;
struct bio_list bio_list_on_stack;
struct bio *bio;
struct blk_plug plug;
spin_lock_irq(q->queue_lock);
@ -798,8 +799,10 @@ out:
* immediate dispatch
*/
if (nr_disp) {
blk_start_plug(&plug);
while((bio = bio_list_pop(&bio_list_on_stack)))
generic_make_request(bio);
blk_finish_plug(&plug);
}
return nr_disp;
}