From 81c38fee6e991ff8623e7b2f2c58e2b9a5db81fd Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 18 Feb 2022 09:08:32 +0100 Subject: [PATCH] blk-mq: do not include passthrough requests in I/O accounting I/O accounting buckets I/O into the read/write/discard categories into which passthrough I/O does not fit at all. It also accounts to the block_device, which may not even exist for passthrough I/O. Signed-off-by: Christoph Hellwig --- block/blk-mq.c | 6 +----- block/blk.h | 2 +- 2 files changed, 2 insertions(+), 6 deletions(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index f1b067d06ab5..2204affde9b0 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -887,11 +887,7 @@ static inline void blk_account_io_done(struct request *req, u64 now) static void __blk_account_io_start(struct request *rq) { - /* passthrough requests can hold bios that do not have ->bi_bdev set */ - if (rq->bio && rq->bio->bi_bdev) - rq->part = rq->bio->bi_bdev; - else if (rq->q->disk) - rq->part = rq->q->disk->part0; + rq->part = rq->bio->bi_bdev; part_stat_lock(); update_io_ticks(rq->part, jiffies, false); diff --git a/block/blk.h b/block/blk.h index ebaa59ca46ca..6f21859c7f0f 100644 --- a/block/blk.h +++ b/block/blk.h @@ -325,7 +325,7 @@ int blk_dev_init(void); */ static inline bool blk_do_io_stat(struct request *rq) { - return (rq->rq_flags & RQF_IO_STAT) && rq->q->disk; + return (rq->rq_flags & RQF_IO_STAT) && !blk_rq_is_passthrough(rq); } void update_io_ticks(struct block_device *part, unsigned long now, bool end); -- 2.50.1