On Thu, 27 Jan 2022 18:00:47 +0800, Laibin Qiu wrote: > Commit 180dccb0dba4f ("blk-mq: fix tag_get wait task can't be > awakened") will recalculating wake_batch when inc or dec active_queues > to avoid wake_batch is > hctx_max_depth. At the same time, in order to > not affect performance as much as possible, the minimum wakeup batch is > set to 4. But when the QD is small (such as QD=1), if inc or dec > active_queues will increase wakeup batch, which will lead to hang. > > [...] Applied, thanks! [1/1] blk-mq: Fix wrong wakeup batch configuration which will cause hang commit: 10825410b956dc1ed8c5fbc8bbedaffdadde7f20 Best regards, -- Jens Axboe