[PATCH 04/10] block/rq_qos: add rq_qos_merge()
From: Tejun Heo <tj@kernel.org>
Date: 2019-08-28 22:06:53
Also in:
linux-block, lkml
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Add a merge hook for rq_qos. This will be used by io.weight. Signed-off-by: Tejun Heo <tj@kernel.org> --- block/blk-core.c | 4 ++++ block/blk-rq-qos.c | 9 +++++++++ block/blk-rq-qos.h | 9 +++++++++ 3 files changed, 22 insertions(+)
diff --git a/block/blk-core.c b/block/blk-core.c
index 77807a5d7f9e..875e8d105067 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c@@ -604,6 +604,7 @@ bool bio_attempt_back_merge(struct request *req, struct bio *bio, return false; trace_block_bio_backmerge(req->q, req, bio); + rq_qos_merge(req->q, req, bio); if ((req->cmd_flags & REQ_FAILFAST_MASK) != ff) blk_rq_set_mixed_merge(req);
@@ -625,6 +626,7 @@ bool bio_attempt_front_merge(struct request *req, struct bio *bio, return false; trace_block_bio_frontmerge(req->q, req, bio); + rq_qos_merge(req->q, req, bio); if ((req->cmd_flags & REQ_FAILFAST_MASK) != ff) blk_rq_set_mixed_merge(req);
@@ -650,6 +652,8 @@ bool bio_attempt_discard_merge(struct request_queue *q, struct request *req, blk_rq_get_max_sectors(req, blk_rq_pos(req))) goto no_merge; + rq_qos_merge(q, req, bio); + req->biotail->bi_next = bio; req->biotail = bio; req->__data_len += bio->bi_iter.bi_size;
diff --git a/block/blk-rq-qos.c b/block/blk-rq-qos.c
index 3954c0dc1443..f4eea78f5cc1 100644
--- a/block/blk-rq-qos.c
+++ b/block/blk-rq-qos.c@@ -83,6 +83,15 @@ void __rq_qos_track(struct rq_qos *rqos, struct request *rq, struct bio *bio) } while (rqos); } +void __rq_qos_merge(struct rq_qos *rqos, struct request *rq, struct bio *bio) +{ + do { + if (rqos->ops->merge) + rqos->ops->merge(rqos, rq, bio); + rqos = rqos->next; + } while (rqos); +} + void __rq_qos_done_bio(struct rq_qos *rqos, struct bio *bio) { do {
diff --git a/block/blk-rq-qos.h b/block/blk-rq-qos.h
index 2300e038b9fa..8e426a8505b6 100644
--- a/block/blk-rq-qos.h
+++ b/block/blk-rq-qos.h@@ -35,6 +35,7 @@ struct rq_qos { struct rq_qos_ops { void (*throttle)(struct rq_qos *, struct bio *); void (*track)(struct rq_qos *, struct request *, struct bio *); + void (*merge)(struct rq_qos *, struct request *, struct bio *); void (*issue)(struct rq_qos *, struct request *); void (*requeue)(struct rq_qos *, struct request *); void (*done)(struct rq_qos *, struct request *);
@@ -135,6 +136,7 @@ void __rq_qos_issue(struct rq_qos *rqos, struct request *rq); void __rq_qos_requeue(struct rq_qos *rqos, struct request *rq); void __rq_qos_throttle(struct rq_qos *rqos, struct bio *bio); void __rq_qos_track(struct rq_qos *rqos, struct request *rq, struct bio *bio); +void __rq_qos_merge(struct rq_qos *rqos, struct request *rq, struct bio *bio); void __rq_qos_done_bio(struct rq_qos *rqos, struct bio *bio); static inline void rq_qos_cleanup(struct request_queue *q, struct bio *bio)
@@ -185,6 +187,13 @@ static inline void rq_qos_track(struct request_queue *q, struct request *rq, __rq_qos_track(q->rq_qos, rq, bio); } +static inline void rq_qos_merge(struct request_queue *q, struct request *rq, + struct bio *bio) +{ + if (q->rq_qos) + __rq_qos_merge(q->rq_qos, rq, bio); +} + void rq_qos_exit(struct request_queue *); #endif
--
2.17.1