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 /block/blk-iolatency.c | |
| 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 'block/blk-iolatency.c')
| -rw-r--r-- | block/blk-iolatency.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c index 554b191a6892..45bd18f68541 100644 --- a/block/blk-iolatency.c +++ b/block/blk-iolatency.c @@ -742,10 +742,15 @@ static void blkiolatency_enable_work_fn(struct work_struct *work) */ enabled = atomic_read(&blkiolat->enable_cnt); if (enabled != blkiolat->enabled) { + struct request_queue *q = blkiolat->rqos.disk->queue; unsigned int memflags; memflags = blk_mq_freeze_queue(blkiolat->rqos.disk->queue); blkiolat->enabled = enabled; + if (enabled) + blk_queue_flag_set(QUEUE_FLAG_BIO_ISSUE_TIME, q); + else + blk_queue_flag_clear(QUEUE_FLAG_BIO_ISSUE_TIME, q); blk_mq_unfreeze_queue(blkiolat->rqos.disk->queue, memflags); } } |