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 <axboe@kernel.dk>
Link: https://lore.kernel.org/r/20211019153300.623322-2-axboe@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 9840b15..a4d5b77 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) {
