On 2020/5/25 19:30, Christoph Hellwig wrote:
> Switch bcache to use the nicer bio accounting helpers, and call the
> routines where we also sample the start time to give coherent accounting
> results.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Acked-by: Coly Li <colyli@xxxxxxx>
Coly Li
> ---
> drivers/md/bcache/request.c | 18 ++++--------------
> 1 file changed, 4 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
> index 77d1a26975174..22b483527176b 100644
> --- a/drivers/md/bcache/request.c
> +++ b/drivers/md/bcache/request.c
> @@ -668,9 +668,7 @@ static void backing_request_endio(struct bio *bio)
> static void bio_complete(struct search *s)
> {
> if (s->orig_bio) {
> - generic_end_io_acct(s->d->disk->queue, bio_op(s->orig_bio),
> - &s->d->disk->part0, s->start_time);
> -
> + bio_end_io_acct(s->orig_bio, s->start_time);
> trace_bcache_request_end(s->d, s->orig_bio);
> s->orig_bio->bi_status = s->iop.status;
> bio_endio(s->orig_bio);
> @@ -730,7 +728,7 @@ static inline struct search *search_alloc(struct bio *bio,
> s->recoverable = 1;
> s->write = op_is_write(bio_op(bio));
> s->read_dirty_data = 0;
> - s->start_time = jiffies;
> + s->start_time = bio_start_io_acct(bio);
>
> s->iop.c = d->c;
> s->iop.bio = NULL;
> @@ -1082,8 +1080,7 @@ static void detached_dev_end_io(struct bio *bio)
> bio->bi_end_io = ddip->bi_end_io;
> bio->bi_private = ddip->bi_private;
>
> - generic_end_io_acct(ddip->d->disk->queue, bio_op(bio),
> - &ddip->d->disk->part0, ddip->start_time);
> + bio_end_io_acct(bio, ddip->start_time);
>
> if (bio->bi_status) {
> struct cached_dev *dc = container_of(ddip->d,
> @@ -1108,7 +1105,7 @@ static void detached_dev_do_request(struct bcache_device *d, struct bio *bio)
> */
> ddip = kzalloc(sizeof(struct detached_dev_io_private), GFP_NOIO);
> ddip->d = d;
> - ddip->start_time = jiffies;
> + ddip->start_time = bio_start_io_acct(bio);
> ddip->bi_end_io = bio->bi_end_io;
> ddip->bi_private = bio->bi_private;
> bio->bi_end_io = detached_dev_end_io;
> @@ -1190,11 +1187,6 @@ blk_qc_t cached_dev_make_request(struct request_queue *q, struct bio *bio)
> }
> }
>
> - generic_start_io_acct(q,
> - bio_op(bio),
> - bio_sectors(bio),
> - &d->disk->part0);
> -
> bio_set_dev(bio, dc->bdev);
> bio->bi_iter.bi_sector += dc->sb.data_offset;
>
> @@ -1311,8 +1303,6 @@ blk_qc_t flash_dev_make_request(struct request_queue *q, struct bio *bio)
> return BLK_QC_T_NONE;
> }
>
> - generic_start_io_acct(q, bio_op(bio), bio_sectors(bio), &d->disk->part0);
> -
> s = search_alloc(bio, d);
> cl = &s->cl;
> bio = &s->bio.bio;
>
