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[1/1] block/nbd: micro-optimization in nbd request completion

Message ID 1338992116-28094-1-git-send-email-loke.chetan@gmail.com
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

chetan L June 6, 2012, 2:15 p.m. UTC 
Add in-flight cmds to the tail. That way while searching(during request completion),we will always get a hit on the first element.


Signed-off-by: Chetan Loke <loke.chetan@gmail.com>
---
 drivers/block/nbd.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
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Patch

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 061427a..8957b9f 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -481,7 +481,7 @@  static void nbd_handle_req(struct nbd_device *nbd, struct request *req)
 		nbd_end_request(req);
 	} else {
 		spin_lock(&nbd->queue_lock);
-		list_add(&req->queuelist, &nbd->queue_head);
+		list_add_tail(&req->queuelist, &nbd->queue_head);
 		spin_unlock(&nbd->queue_lock);
 	}