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authorMike Krinkin <krinkin.m.u@gmail.com>2015-12-03 17:32:30 +0300
committerJens Axboe <axboe@fb.com>2015-12-03 10:18:44 -0700
commitcda22646adaa453519fac28222f20b0d73aa8562 (patch)
treeca17d1f83e01c6622bdf92634401d263640ab926 /block
parentbffed457160ab48282ca6d0d58646b3bbc2fa554 (diff)
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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 4b1faf931650d4a35b2a ("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>
Diffstat (limited to 'block')
-rw-r--r--block/blk-merge.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 41a55ba0d78e..0e5643a5d1c3 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -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;
}