Messages in this thread Patch in this message | | | Date | Wed, 30 Oct 2013 10:41:46 +0800 | From | majianpeng <> | Subject | [PATCH 3/3] md/raid5: For stripe with R5_ReadNoMerge, we replace REQ_FLUSH with REQ_NOMERGE. |
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For R5_ReadNoMerge,it mean this bio can't merge with other bios or request.It used REQ_FLUSH to achieve this. But REQ_NOMERGE can do the same work.
Signed-off-by: Jianpeng Ma <majianpeng@gmail.com> --- drivers/md/raid5.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index f8b9068..8e0aeaa 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -772,7 +772,7 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s) bi->bi_sector = (sh->sector + rdev->data_offset); if (test_bit(R5_ReadNoMerge, &sh->dev[i].flags)) - bi->bi_rw |= REQ_FLUSH; + bi->bi_rw |= REQ_NOMERGE; bi->bi_vcnt = 1; bi->bi_io_vec[0].bv_len = STRIPE_SIZE; -- 1.8.4 | |