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| author | Ming Lei <ming.lei@canonical.com> | 2015-10-20 23:13:53 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-10-21 15:00:51 -0600 |
| commit | 6ac45aeb6bcad38a2783a7d6e5da4c469497eeb0 (patch) | |
| tree | 666a97a544ba4a465be7839989fce19746c73a8a /block/blk-merge.c | |
| parent | bdced438acd83ad83a6c6fc7f50099b820245ddb (diff) | |
| download | linux-6ac45aeb6bcad38a2783a7d6e5da4c469497eeb0.tar.gz linux-6ac45aeb6bcad38a2783a7d6e5da4c469497eeb0.tar.bz2 linux-6ac45aeb6bcad38a2783a7d6e5da4c469497eeb0.zip | |
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>
Diffstat (limited to 'block/blk-merge.c')
| -rw-r--r-- | block/blk-merge.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c index 22293fdf6514..de5716d8e525 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; |