diff options
| author | Kundan Kumar <kundan.kumar@samsung.com> | 2023-11-23 20:03:31 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-12-02 02:29:18 +0100 |
| commit | 847c5bcdfb41704e52930783b028302f415a3209 (patch) | |
| tree | 5d4f1b58567dfda825648d621c88be920555693d /block/blk-mq.c | |
| parent | io_uring: remove uring_cmd cookie (diff) | |
| download | linux-847c5bcdfb41704e52930783b028302f415a3209.tar.xz linux-847c5bcdfb41704e52930783b028302f415a3209.zip | |
block: skip QUEUE_FLAG_STATS and rq-qos for passthrough io
Write-back throttling (WBT) enables QUEUE_FLAG_STATS on the request
queue. But WBT does not make sense for passthrough io, so skip
QUEUE_FLAG_STATS processing.
Also skip rq_qos_issue/done for passthrough io.
Overall, the change gives ~11% hike in peak performance.
Signed-off-by: Kundan Kumar <kundan.kumar@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Link: https://lore.kernel.org/r/20231123190331.7934-1-kundan.kumar@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 900c1be1fee1..fb29ff5cc281 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1248,7 +1248,8 @@ void blk_mq_start_request(struct request *rq) trace_block_rq_issue(rq); - if (test_bit(QUEUE_FLAG_STATS, &q->queue_flags)) { + if (test_bit(QUEUE_FLAG_STATS, &q->queue_flags) && + !blk_rq_is_passthrough(rq)) { rq->io_start_time_ns = ktime_get_ns(); rq->stats_sectors = blk_rq_sectors(rq); rq->rq_flags |= RQF_STATS; |