diff options
| author | Yu Kuai <yukuai3@huawei.com> | 2025-09-10 14:30:43 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-09-10 05:23:45 -0600 |
| commit | ea3d1f104db60f9d5074b33819ccea3c216e0bee (patch) | |
| tree | cfa9dd2c172119be3990c7d764009e0e106f18ed /include/linux/blkdev.h | |
| parent | 1f963bdd6420b6080bcfd0ee84a75c96f35545a6 (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>
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index c8cb08b2ed29..7c542b1851fa 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -657,6 +657,7 @@ enum { QUEUE_FLAG_DISABLE_WBT_DEF, /* for sched to disable/enable wbt */ QUEUE_FLAG_NO_ELV_SWITCH, /* can't switch elevator any more */ QUEUE_FLAG_QOS_ENABLED, /* qos is enabled */ + QUEUE_FLAG_BIO_ISSUE_TIME, /* record bio->issue_time_ns */ QUEUE_FLAG_MAX }; |