Yu Kuai ea3d1f104d blk-mq: add QUEUE_FLAG_BIO_ISSUE_TIME ...

bio->issue_time_ns is initialized for every bio, however, it's only used
by blk-iolatency. Add a new queue_flag and only set this flag when
blk-iolatency is enabled, so that extra blk_time_get_ns() can be saved
for disks that blk-iolatency is not enabled.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2025-09-10 05:23:45 -06:00

30 KiB

Raw Permalink Blame History

View Raw