Commit 6ac45aeb authored Oct 20, 2015 by Ming Lei Committed by Jens Axboe Oct 21, 2015

block: avoid to merge splitted bio



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

Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens 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;