diff options
| author | Zizhi Wo <wozizhi@huawei.com> | 2025-05-06 10:09:31 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-05-13 12:08:27 -0600 |
| commit | c4da7bf54b1f76e7c5c8cc6d1c4db8b19af67c5d (patch) | |
| tree | 3e4b052c88044599e1ee6d54f9d056b19d6de1f5 /include/linux | |
| parent | a404be5399d762f5737a4a731b42a38f552f2b44 (diff) | |
blk-throttle: Introduce flag "BIO_TG_BPS_THROTTLED"
Subsequent patches will split the single queue into separate bps and iops
queues. To prevent IO that has already passed through the bps queue at a
single tg level from being counted toward bps wait time again, we introduce
"BIO_TG_BPS_THROTTLED" flag. Since throttle and QoS operate at different
levels, we reuse the value as "BIO_QOS_THROTTLED".
We set this flag when charge bps and clear it when charge iops, as the bio
will move to the upper-level tg or be dispatched.
This patch does not involve functional changes.
Signed-off-by: Zizhi Wo <wozizhi@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Zizhi Wo <wozizhi@huaweicloud.com>
Link: https://lore.kernel.org/r/20250506020935.655574-5-wozizhi@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/blk_types.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index f38425338c3f..3d1577f07c1c 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -296,6 +296,14 @@ enum { * of this bio. */ BIO_CGROUP_ACCT, /* has been accounted to a cgroup */ BIO_QOS_THROTTLED, /* bio went through rq_qos throttle path */ + /* + * This bio has completed bps throttling at the single tg granularity, + * which is different from BIO_BPS_THROTTLED. When the bio is enqueued + * into the sq->queued of the upper tg, or is about to be dispatched, + * this flag needs to be cleared. Since blk-throttle and rq_qos are not + * on the same hierarchical level, reuse the value. + */ + BIO_TG_BPS_THROTTLED = BIO_QOS_THROTTLED, BIO_QOS_MERGED, /* but went through rq_qos merge path */ BIO_REMAPPED, BIO_ZONE_WRITE_PLUGGING, /* bio handled through zone write plugging */ |