Hi, This patch set did some improvements for blk throttle, please help to review. Thanks. Changes from v1: - Add another 4 new patches in this patch set. Baolin Wang (8): blk-throttle: Remove a meaningless parameter for throtl_downgrade_state() blk-throttle: Avoid getting the current time if tg->last_finish_time is 0 blk-throttle: Avoid tracking latency if low limit is invalid blk-throttle: Fix IO hang for a corner case blk-throttle: Move the list operation after list validation blk-throttle: Move service tree validation out of the throtl_rb_first() blk-throttle: Open code __throtl_de/enqueue_tg() blk-throttle: Re-use the throtl_set_slice_end() block/blk-throttle.c | 69 ++++++++++++++++++++++++++-------------------------- 1 file changed, 35 insertions(+), 34 deletions(-) -- 1.8.3.1