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(parent: 1f963bd) | patch
blk-mq: add QUEUE_FLAG_BIO_ISSUE_TIME
authorYu Kuai <yukuai3@huawei.com>
Wed, 10 Sep 2025 06:30:43 +0000 (14:30 +0800)
committerJens Axboe <axboe@kernel.dk>
Wed, 10 Sep 2025 11:23:45 +0000 (05:23 -0600)
commitea3d1f104db60f9d5074b33819ccea3c216e0bee
treecfa9dd2c172119be3990c7d764009e0e106f18edtree
parent1f963bdd6420b6080bcfd0ee84a75c96f35545a6commit | diff
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>
block/blk-iolatency.c diff | blob | blame | history
block/blk-mq-debugfs.c diff | blob | blame | history
block/blk-mq.c diff | blob | blame | history
include/linux/blkdev.h diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)