diff mbox series

[01/14] blk-mq: do not include passthrough requests in I/O accounting

Message ID 20220227172144.508118-2-hch@lst.de
State Superseded
Headers show
Series [01/14] blk-mq: do not include passthrough requests in I/O accounting | expand

Commit Message

Christoph Hellwig Feb. 27, 2022, 5:21 p.m. UTC 
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 <hch@lst.de>
---
 block/blk-mq.c | 6 +-----
 block/blk.h    | 2 +-
 2 files changed, 2 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/block/blk-mq.c b/block/blk-mq.c
index a05ce77250316..ee80853473d1e 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -883,11 +883,7 @@  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 ebaa59ca46ca6..6f21859c7f0ff 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);