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| author | Yu Kuai <yukuai3@huawei.com> | 2022-08-27 12:16:36 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-09-12 08:20:07 +0200 |
| commit | 8c25ed0cb9d2e349ebebfeacf7ce1ae015afe54d (patch) | |
| tree | 35ef98f722116826a86192818072b417d77e3159 /block/blk-throttle.c | |
| parent | blk-throttle: use 'READ/WRITE' instead of '0/1' (diff) | |
| download | linux-8c25ed0cb9d2e349ebebfeacf7ce1ae015afe54d.tar.xz linux-8c25ed0cb9d2e349ebebfeacf7ce1ae015afe54d.zip | |
blk-throttle: calling throtl_dequeue/enqueue_tg in pairs
It's a little weird to call throtl_dequeue_tg() unconditionally in
throtl_select_dispatch(), since it will be called in tg_update_disptime()
again if some bio is still throttled. Thus call it later if there are no
throttled bio. There are no functional changes.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20220827101637.1775111-3-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-throttle.c')
| -rw-r--r-- | block/blk-throttle.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 27d46a7d309b..4c12df8f6bae 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -1146,13 +1146,13 @@ static int throtl_select_dispatch(struct throtl_service_queue *parent_sq) if (time_before(jiffies, tg->disptime)) break; - throtl_dequeue_tg(tg); - nr_disp += throtl_dispatch_tg(tg); sq = &tg->service_queue; if (sq->nr_queued[READ] || sq->nr_queued[WRITE]) tg_update_disptime(tg); + else + throtl_dequeue_tg(tg); if (nr_disp >= THROTL_QUANTUM) break; |