diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/Kconfig | 3 | ||||
| -rw-r--r-- | block/blk-mq.c | 13 |
2 files changed, 14 insertions, 2 deletions
diff --git a/block/Kconfig b/block/Kconfig index 8b5f8e560eb4..1b62ad6d0e12 100644 --- a/block/Kconfig +++ b/block/Kconfig @@ -26,6 +26,9 @@ menuconfig BLOCK if BLOCK +config BLK_RQ_ALLOC_TIME + bool + config BLK_SCSI_REQUEST bool diff --git a/block/blk-mq.c b/block/blk-mq.c index cf768d0c2950..004411236034 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -291,7 +291,7 @@ static inline bool blk_mq_need_time_stamp(struct request *rq) } static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data, - unsigned int tag, unsigned int op) + unsigned int tag, unsigned int op, u64 alloc_time_ns) { struct blk_mq_tags *tags = blk_mq_tags_from_data(data); struct request *rq = tags->static_rqs[tag]; @@ -325,6 +325,9 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data, RB_CLEAR_NODE(&rq->rb_node); rq->rq_disk = NULL; rq->part = NULL; +#ifdef CONFIG_BLK_RQ_ALLOC_TIME + rq->alloc_time_ns = alloc_time_ns; +#endif if (blk_mq_need_time_stamp(rq)) rq->start_time_ns = ktime_get_ns(); else @@ -356,8 +359,14 @@ static struct request *blk_mq_get_request(struct request_queue *q, struct request *rq; unsigned int tag; bool clear_ctx_on_error = false; + u64 alloc_time_ns = 0; blk_queue_enter_live(q); + + /* alloc_time includes depth and tag waits */ + if (blk_queue_rq_alloc_time(q)) + alloc_time_ns = ktime_get_ns(); + data->q = q; if (likely(!data->ctx)) { data->ctx = blk_mq_get_ctx(q); @@ -393,7 +402,7 @@ static struct request *blk_mq_get_request(struct request_queue *q, return NULL; } - rq = blk_mq_rq_ctx_init(data, tag, data->cmd_flags); + rq = blk_mq_rq_ctx_init(data, tag, data->cmd_flags, alloc_time_ns); if (!op_is_flush(data->cmd_flags)) { rq->elv.icq = NULL; if (e && e->type->ops.prepare_request) { |