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>
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;
static inline void rq_qos_done(struct request_queue *q, struct request *rq)
{
- if (q->rq_qos)
+ if (q->rq_qos && !blk_rq_is_passthrough(rq))
__rq_qos_done(q->rq_qos, rq);
}