diff mbox series

[v3,04/15] md/raid5: Move stripe_add_to_batch_list() call out of add_stripe_bio()

Message ID 20220616191945.23935-5-logang@deltatee.com (mailing list archive)
State Accepted, archived
Headers show
Series Improve Raid5 Lock Contention | expand

Commit Message

Logan Gunthorpe June 16, 2022, 7:19 p.m. UTC 
stripe_add_to_batch_list() is better done in the loop in make_request
instead of inside add_stripe_bio(). This is clearer and allows for
storing the batch_head state outside the loop in a subsequent patch.

The call to add_stripe_bio() in retry_aligned_read() is for read
and batching only applies to write. So it's impossible for batching
to happen at that call site.

No functional changes intended.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Guoqing Jiang <guoqing.jiang@linux.dev>
---
 drivers/md/raid5.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 25db747c5856..969609b7114b 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3531,8 +3531,6 @@  static int add_stripe_bio(struct stripe_head *sh, struct bio *bi, int dd_idx,
 	}
 	spin_unlock_irq(&sh->stripe_lock);
 
-	if (stripe_can_batch(sh))
-		stripe_add_to_batch_list(conf, sh);
 	return 1;
 
  overlap:
@@ -5950,6 +5948,9 @@  static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
 			goto retry;
 		}
 
+		if (stripe_can_batch(sh))
+			stripe_add_to_batch_list(conf, sh);
+
 		if (do_flush) {
 			set_bit(STRIPE_R5C_PREFLUSH, &sh->state);
 			/* we only need flush for one stripe */