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block: remove the request_queue argument to the block_split tracepoint 

The request_queue can trivially be derived from the bio.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-12-03 17:21:37 +01:00 committed by Jens Axboe
parent e8a676d61c
commit eb6f7f7cd3
4 changed files with 10 additions and 13 deletions
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2
block/blk-merge.c
View File

@ -338,7 +338,7 @@ void __blk_queue_split(struct bio **bio, unsigned int *nr_segs)
split->bi_opf |= REQ_NOMERGE;
bio_chain(split, *bio);
trace_block_split(q, split, (*bio)->bi_iter.bi_sector);
trace_block_split(split, (*bio)->bi_iter.bi_sector);
submit_bio_noacct(*bio);
*bio = split;
}

2
drivers/md/dm.c
View File

@ -1612,7 +1612,7 @@ static blk_qc_t __split_and_process_bio(struct mapped_device *md,
part_stat_unlock();
bio_chain(b, bio);
trace_block_split(md->queue, b, bio->bi_iter.bi_sector);
trace_block_split(b, bio->bi_iter.bi_sector);
ret = submit_bio_noacct(bio);
break;
}

14
include/trace/events/block.h
View File

@ -411,21 +411,19 @@ DEFINE_EVENT(block_unplug, block_unplug,
/**
* block_split - split a single bio struct into two bio structs
* @q: queue containing the bio
* @bio: block operation being split
* @new_sector: The starting sector for the new bio
*
* The bio request @bio in request queue @q needs to be split into two
* bio requests. The newly created @bio request starts at
* @new_sector. This split may be required due to hardware limitation
* such as operation crossing device boundaries in a RAID system.
* The bio request @bio needs to be split into two bio requests. The newly
* created @bio request starts at @new_sector. This split may be required due to
* hardware limitations such as operation crossing device boundaries in a RAID
* system.
*/
TRACE_EVENT(block_split,
TP_PROTO(struct request_queue *q, struct bio *bio,
unsigned int new_sector),
TP_PROTO(struct bio *bio, unsigned int new_sector),
TP_ARGS(q, bio, new_sector),
TP_ARGS(bio, new_sector),
TP_STRUCT__entry(
__field( dev_t, dev )

5
kernel/trace/blktrace.c
View File

@ -970,10 +970,9 @@ static void blk_add_trace_unplug(void *ignore, struct request_queue *q,
rcu_read_unlock();
}
static void blk_add_trace_split(void *ignore,
struct request_queue *q, struct bio *bio,
unsigned int pdu)
static void blk_add_trace_split(void *ignore, struct bio *bio, unsigned int pdu)
{
struct request_queue *q = bio->bi_disk->queue;
struct blk_trace *bt;
rcu_read_lock();