This is a note to let you know that I've just added the patch titled blk-mq: do not update io_ticks with passthrough requests to the 5.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: blk-mq-do-not-update-io_ticks-with-passthrough-reque.patch and it can be found in the queue-5.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit c4b0001b0d8eebbb544318ed9af1e340e198e73a Author: Haisu Wang <haisuwang@xxxxxxxxxxx> Date: Mon May 30 14:40:59 2022 +0800 blk-mq: do not update io_ticks with passthrough requests [ Upstream commit b81c14ca14b631aa1abae32fb5ae75b5e9251012 ] Flush or passthrough requests are not accounted as normal IO in completion. To reflect iostat for slow IO, io_ticks is updated when stat show called based on inflight numbers. It may cause inconsistent io_ticks calculation result. So do not account non-passthrough request when check inflight. Fixes: 86d7331299fd ("block: update io_ticks when io hang") Signed-off-by: Haisu Wang <haisuwang@xxxxxxxxxxx> Reviewed-by: samuelliao <samuelliao@xxxxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Link: https://lore.kernel.org/r/20220530064059.1120058-1-haisuwang@xxxxxxxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/block/blk-mq.c b/block/blk-mq.c index 9d33e0032fee..de7fc6957271 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -133,7 +133,8 @@ static bool blk_mq_check_inflight(struct request *rq, void *priv, { struct mq_inflight *mi = priv; - if ((!mi->part->bd_partno || rq->part == mi->part) && + if (rq->part && blk_do_io_stat(rq) && + (!mi->part->bd_partno || rq->part == mi->part) && blk_mq_rq_state(rq) == MQ_RQ_IN_FLIGHT) mi->inflight[rq_data_dir(rq)]++;