From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ming Lei Subject: [PATCH 19/27] dm: dm.c: replace 'bio->bi_vcnt == 1' with !bio_multiple_segments Date: Tue, 5 Apr 2016 20:07:34 +0800 Message-ID: <1459858062-21075-5-git-send-email-tom.leiming@gmail.com> References: <1459858062-21075-1-git-send-email-tom.leiming@gmail.com> Return-path: In-Reply-To: <1459858062-21075-1-git-send-email-tom.leiming@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: Jens Axboe , linux-kernel@vger.kernel.org Cc: linux-block@vger.kernel.org, Christoph Hellwig , Boaz Harrosh , Ming Lei , Alasdair Kergon , Mike Snitzer , "maintainer:DEVICE-MAPPER LVM" , Shaohua Li , "open list:SOFTWARE RAID Multiple Disks SUPPORT" List-Id: dm-devel.ids Signed-off-by: Ming Lei --- drivers/md/dm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index be49057..4c34f88 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2172,7 +2172,8 @@ static void dm_request_fn(struct request_queue *q) pos = blk_rq_pos(rq); if ((dm_request_peeked_before_merge_deadline(md) && - md_in_flight(md) && rq->bio && rq->bio->bi_vcnt == 1 && + md_in_flight(md) && rq->bio && + !bio_multiple_segments(rq->bio) && md->last_rq_pos == pos && md->last_rq_rw == rq_data_dir(rq)) || (ti->type->busy && ti->type->busy(ti))) { blk_delay_queue(q, HZ / 100); -- 1.9.1