Messages in this thread Patch in this message | | | From | Ming Lei <> | Subject | [PATCH 2/4] block: avoid to merge splitted bio | Date | Wed, 14 Oct 2015 11:30:46 +0800 |
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The splitted bio has been already too fat to merge, so mark it as NOMERGE.
Signed-off-by: Ming Lei <ming.lei@canonical.com> --- block/blk-merge.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/block/blk-merge.c b/block/blk-merge.c index 22293fd..de5716d8 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -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; -- 1.9.1
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