Commit 6ac45aeb authored by Ming Lei's avatar Ming Lei Committed by Jens Axboe
Browse files

block: avoid to merge splitted bio 



The splitted bio has been already too fat to merge, so mark it
as NOMERGE.

Reviewed-by: default avatarJeff Moyer <jmoyer@redhat.com>
Signed-off-by: default avatarMing Lei <ming.lei@canonical.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent bdced438

block/blk-merge.c

+3 −0
Original line number Diff line number Diff line
@@ -139,6 +139,9 @@ void blk_queue_split(struct request_queue *q, struct bio **bio, 
	bio_set_flag(res, BIO_SEG_VALID);



	if (split) {

		/* there isn't chance to merge the splitted bio */

		split->bi_rw |= REQ_NOMERGE;



		bio_chain(split, *bio);

		generic_make_request(*bio);

		*bio = split;