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blkcg: consolidate bio_issue_init() to be a part of core 

bio_issue_init among other things initializes the timestamp for an IO.
Rather than have this logic handled by policies, this consolidates it to
be on the init paths (normal, clone, bounce clone).

Signed-off-by: Dennis Zhou <dennis@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Dennis Zhou 2018-12-05 12:10:32 -05:00 committed by Jens Axboe
parent 5cdf2e3fea
commit e439bedf6b
5 changed files with 11 additions and 10 deletions
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1
block/bio.c
View File

@ -611,6 +611,7 @@ void __bio_clone_fast(struct bio *bio, struct bio *bio_src)
bio->bi_io_vec = bio_src->bi_io_vec;
bio_clone_blkcg_association(bio, bio_src);
blkcg_bio_issue_init(bio);
}
EXPORT_SYMBOL(__bio_clone_fast);

2
block/blk-iolatency.c
View File

@ -478,8 +478,6 @@ static void blkcg_iolatency_throttle(struct rq_qos *rqos, struct bio *bio)
if (!blk_iolatency_enabled(blkiolat))
return;
bio_issue_init(&bio->bi_issue, bio_sectors(bio));
while (blkg && blkg->parent) {
struct iolatency_grp *iolat = blkg_to_lat(blkg);
if (!iolat) {

8
block/blk-throttle.c
View File

@ -2115,13 +2115,6 @@ static inline void throtl_update_latency_buckets(struct throtl_data *td)
}
#endif
static void blk_throtl_assoc_bio(struct bio *bio)
{
#ifdef CONFIG_BLK_DEV_THROTTLING_LOW
bio_issue_init(&bio->bi_issue, bio_sectors(bio));
#endif
}
bool blk_throtl_bio(struct request_queue *q, struct blkcg_gq *blkg,
struct bio *bio)
{
@ -2142,7 +2135,6 @@ bool blk_throtl_bio(struct request_queue *q, struct blkcg_gq *blkg,
throtl_update_latency_buckets(td);
blk_throtl_assoc_bio(bio);
blk_throtl_update_idletime(tg);
sq = &tg->service_queue;

1
block/bounce.c
View File

@ -278,6 +278,7 @@ static struct bio *bounce_clone_bio(struct bio *bio_src, gfp_t gfp_mask,
}
bio_clone_blkcg_association(bio, bio_src);
blkcg_bio_issue_init(bio);
return bio;
}

9
include/linux/blk-cgroup.h
View File

@ -800,6 +800,12 @@ static inline bool blk_throtl_bio(struct request_queue *q, struct blkcg_gq *blkg
struct bio *bio) { return false; }
#endif
static inline void blkcg_bio_issue_init(struct bio *bio)
{
bio_issue_init(&bio->bi_issue, bio_sectors(bio));
}
static inline bool blkcg_bio_issue_check(struct request_queue *q,
struct bio *bio)
{
@ -831,6 +837,8 @@ static inline bool blkcg_bio_issue_check(struct request_queue *q,
blkg_rwstat_add(&blkg->stat_ios, bio->bi_opf, 1);
}
blkcg_bio_issue_init(bio);
return !throtl;
}
@ -936,6 +944,7 @@ static inline char *blkg_path(struct blkcg_gq *blkg) { return NULL; }
static inline void blkg_get(struct blkcg_gq *blkg) { }
static inline void blkg_put(struct blkcg_gq *blkg) { }
static inline void blkcg_bio_issue_init(struct bio *bio) { }
static inline bool blkcg_bio_issue_check(struct request_queue *q,
struct bio *bio) { return true; }