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 <[email protected]> --- block/blk-merge.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/block/blk-merge.c b/block/blk-merge.c index de5716d8..3bb4537 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, @@ -143,6 +145,7 @@ 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; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
