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 <[email protected]>

Acked-by: Coly Li <[email protected]>


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;
> 
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