Commit cda22646 authored Dec 03, 2015 by Mike Krinkin Committed by Jens Axboe Dec 03, 2015

block: add call to split trace point



There is a split tracepoint that is supposed to be called when
bio is splitted, and it was called in bio_split function until
commit 4b1faf93 ("block: Kill bio_pair_split()").
But now, no one reports splits, so this patch adds call to
trace_block_split back in blk_queue_split right after split.

Signed-off-by: Mike Krinkin <krinkin.m.u@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

parent bffed457

block/blk-merge.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -7,6 +7,8 @@
		#include <linux/blkdev.h>
		#include <linux/scatterlist.h>

		#include <trace/events/block.h>

		#include "blk.h"

		static struct bio blk_bio_discard_split(struct request_queue q,
		@@ -159,6 +161,7 @@ void blk_queue_split(struct request_queue q, struct bio *bio,
		split->bi_rw \|= REQ_NOMERGE;

		bio_chain(split, *bio);
		trace_block_split(q, split, (*bio)->bi_iter.bi_sector);
		generic_make_request(*bio);
		*bio = split;
		}