diff options
| author | Jens Axboe <axboe@kernel.dk> | 2018-10-29 22:06:13 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-11-07 21:44:59 +0100 |
| commit | ea4f995ee8b8f0578b3319949f2edd5d812fdb0a (patch) | |
| tree | f7516777fbd8b2fc16cf75b846792981c3a07434 /block/blk-mq-debugfs.c | |
| parent | blk-mq: separate number of hardware queues from nr_cpu_ids (diff) | |
| download | linux-ea4f995ee8b8f0578b3319949f2edd5d812fdb0a.tar.xz linux-ea4f995ee8b8f0578b3319949f2edd5d812fdb0a.zip | |
blk-mq: cache request hardware queue mapping
We call blk_mq_map_queue() a lot, at least two times for each
request per IO, sometimes more. Since we now have an indirect
call as well in that function. cache the mapping so we don't
have to re-call blk_mq_map_queue() for the same request
multiple times.
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq-debugfs.c')
| -rw-r--r-- | block/blk-mq-debugfs.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c index fac70c81b7de..cde19be36135 100644 --- a/block/blk-mq-debugfs.c +++ b/block/blk-mq-debugfs.c @@ -427,10 +427,8 @@ struct show_busy_params { static void hctx_show_busy_rq(struct request *rq, void *data, bool reserved) { const struct show_busy_params *params = data; - struct blk_mq_hw_ctx *hctx; - hctx = blk_mq_map_queue(rq->q, rq->cmd_flags, rq->mq_ctx->cpu); - if (hctx == params->hctx) + if (rq->mq_hctx == params->hctx) __blk_mq_debugfs_rq_show(params->m, list_entry_rq(&rq->queuelist)); } |