From 56f8da642bd827ef50a952e7bc3728c5830452be Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Tue, 19 Oct 2021 09:32:57 -0600 Subject: block: add rq_flags to struct blk_mq_alloc_data There's a hole here we can use, and it's faster to set this earlier rather than need to check q->elevator multiple times. Signed-off-by: Jens Axboe Link: https://lore.kernel.org/r/20211019153300.623322-2-axboe@kernel.dk Signed-off-by: Jens Axboe --- block/blk-mq.c | 20 ++++++++++---------- block/blk-mq.h | 8 ++++---- 2 files changed, 14 insertions(+), 14 deletions(-) (limited to 'block') diff --git a/block/blk-mq.c b/block/blk-mq.c index 9840b15f505b..a4d5b779a65a 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -321,25 +321,22 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data, struct blk_mq_ctx *ctx = data->ctx; struct blk_mq_hw_ctx *hctx = data->hctx; struct request_queue *q = data->q; - struct elevator_queue *e = q->elevator; struct blk_mq_tags *tags = blk_mq_tags_from_data(data); struct request *rq = tags->static_rqs[tag]; - unsigned int rq_flags = 0; - if (e) { - rq_flags = RQF_ELV; - rq->tag = BLK_MQ_NO_TAG; - rq->internal_tag = tag; - } else { + if (!(data->rq_flags & RQF_ELV)) { rq->tag = tag; rq->internal_tag = BLK_MQ_NO_TAG; + } else { + rq->tag = BLK_MQ_NO_TAG; + rq->internal_tag = tag; } if (data->flags & BLK_MQ_REQ_PM) - rq_flags |= RQF_PM; + data->rq_flags |= RQF_PM; if (blk_queue_io_stat(q)) - rq_flags |= RQF_IO_STAT; - rq->rq_flags = rq_flags; + data->rq_flags |= RQF_IO_STAT; + rq->rq_flags = data->rq_flags; if (blk_mq_need_time_stamp(rq)) rq->start_time_ns = ktime_get_ns(); @@ -490,6 +487,7 @@ struct request *blk_mq_alloc_request(struct request_queue *q, unsigned int op, .q = q, .flags = flags, .cmd_flags = op, + .rq_flags = q->elevator ? RQF_ELV : 0, .nr_tags = 1, }; struct request *rq; @@ -519,6 +517,7 @@ struct request *blk_mq_alloc_request_hctx(struct request_queue *q, .q = q, .flags = flags, .cmd_flags = op, + .rq_flags = q->elevator ? RQF_ELV : 0, .nr_tags = 1, }; u64 alloc_time_ns = 0; @@ -2512,6 +2511,7 @@ void blk_mq_submit_bio(struct bio *bio) .q = q, .nr_tags = 1, .cmd_flags = bio->bi_opf, + .rq_flags = q->elevator ? RQF_ELV : 0, }; if (plug) { diff --git a/block/blk-mq.h b/block/blk-mq.h index 08fb5922e611..28859fc5faee 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -149,6 +149,7 @@ struct blk_mq_alloc_data { blk_mq_req_flags_t flags; unsigned int shallow_depth; unsigned int cmd_flags; + unsigned int rq_flags; /* allocate multiple requests/tags in one go */ unsigned int nr_tags; @@ -166,10 +167,9 @@ static inline bool blk_mq_is_shared_tags(unsigned int flags) static inline struct blk_mq_tags *blk_mq_tags_from_data(struct blk_mq_alloc_data *data) { - if (data->q->elevator) - return data->hctx->sched_tags; - - return data->hctx->tags; + if (!(data->rq_flags & RQF_ELV)) + return data->hctx->tags; + return data->hctx->sched_tags; } static inline bool blk_mq_hctx_stopped(struct blk_mq_hw_ctx *hctx) -- cgit v1.2.3