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md/bcache: use generic io stats accounting functions to simplify io stat accounting 

Use generic io stats accounting help functions (generic_{start,end}_io_acct)
to simplify io stat accounting.

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Acked-by: Kent Overstreet <kmo@datera.io>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Gu Zheng 2014-11-24 11:05:24 +08:00 committed by Jens Axboe
parent f74cd637b2
commit aae4933da9
1 changed files with 6 additions and 17 deletions
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23
drivers/md/bcache/request.c
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@ -601,13 +601,8 @@ static void request_endio(struct bio *bio, int error)
static void bio_complete(struct search *s)
{
if (s->orig_bio) {
int cpu, rw = bio_data_dir(s->orig_bio);
unsigned long duration = jiffies - s->start_time;
cpu = part_stat_lock();
part_round_stats(cpu, &s->d->disk->part0);
part_stat_add(cpu, &s->d->disk->part0, ticks[rw], duration);
part_stat_unlock();
generic_end_io_acct(bio_data_dir(s->orig_bio),
&s->d->disk->part0, s->start_time);
trace_bcache_request_end(s->d, s->orig_bio);
bio_endio(s->orig_bio, s->iop.error);
@ -959,12 +954,9 @@ static void cached_dev_make_request(struct request_queue *q, struct bio *bio)
struct search *s;
struct bcache_device *d = bio->bi_bdev->bd_disk->private_data;
struct cached_dev *dc = container_of(d, struct cached_dev, disk);
int cpu, rw = bio_data_dir(bio);
int rw = bio_data_dir(bio);
cpu = part_stat_lock();
part_stat_inc(cpu, &d->disk->part0, ios[rw]);
part_stat_add(cpu, &d->disk->part0, sectors[rw], bio_sectors(bio));
part_stat_unlock();
generic_start_io_acct(rw, bio_sectors(bio), &d->disk->part0);
bio->bi_bdev = dc->bdev;
bio->bi_iter.bi_sector += dc->sb.data_offset;
@ -1074,12 +1066,9 @@ static void flash_dev_make_request(struct request_queue *q, struct bio *bio)
struct search *s;
struct closure *cl;
struct bcache_device *d = bio->bi_bdev->bd_disk->private_data;
int cpu, rw = bio_data_dir(bio);
int rw = bio_data_dir(bio);
cpu = part_stat_lock();
part_stat_inc(cpu, &d->disk->part0, ios[rw]);
part_stat_add(cpu, &d->disk->part0, sectors[rw], bio_sectors(bio));
part_stat_unlock();
generic_start_io_acct(rw, bio_sectors(bio), &d->disk->part0);
s = search_alloc(bio, d);
cl = &s->cl;