[PATCH 2/2 V1] raid5: For odirect-write performance, not set STRIPE_PREREAD_ACTIVE.

[majianpeng <majianpeng@xxxxxxxxx>]

Using flag REQ_NOIDLE to difference odirect-write and sync_write.

Signed-off-by: Jianpeng Ma <majianpeng@xxxxxxxxx>
---
 drivers/md/raid5.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 04348d7..29edaf0 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -4113,7 +4113,10 @@ static void make_request(struct mddev *mddev, struct bio * bi)
 			finish_wait(&conf->wait_for_overlap, &w);
 			set_bit(STRIPE_HANDLE, &sh->state);
 			clear_bit(STRIPE_DELAYED, &sh->state);
-			if ((bi->bi_rw & REQ_SYNC) &&
+			/* Difference odirect-write between regular file
+			 * and block-device
+			 */
+			if ((bi->bi_rw & REQ_NOIDLE) &&
 			    !test_and_set_bit(STRIPE_PREREAD_ACTIVE, &sh->state))
 				atomic_inc(&conf->preread_active_stripes);
 			mddev_check_plugged(mddev);
-- 
1.7.5.4
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