From: Yu Kuai <yukuai3@xxxxxxxxxx> It's a litter 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. Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx> --- block/blk-throttle.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/blk-throttle.c b/block/blk-throttle.c index e690dc1c1cde..ab30efedff4e 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -1151,13 +1151,13 @@ 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; -- 2.31.1
