LIFO ordering for batched completions is a bit unexpected and also defeats some merging optimizations in e.g. the XFS buffered write code. Now that we can easily add the request to the tail of the list do that. Signed-off-by: Christoph Hellwig <hch@xxxxxx> --- include/linux/blk-mq.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index c61e04365677..c596e0e4cb75 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -884,7 +884,7 @@ static inline bool blk_mq_add_to_batch(struct request *req, else if (iob->complete != complete) return false; iob->need_ts |= blk_mq_need_time_stamp(req); - rq_list_add_head(&iob->req_list, req); + rq_list_add_tail(&iob->req_list, req); return true; } -- 2.45.2
