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Date: Wed, 6 Jun 2012 10:15:16 -0400
From: Chetan Loke <loke.chetan@...il.com>
To: Paul.Clements@...eleye.com, axboe@...nel.dk,
linux-kernel@...r.kernel.org
Cc: netdev@...r.kernel.org, Chetan Loke <loke.chetan@...il.com>
Subject: [PATCH 1/1] block/nbd: micro-optimization in nbd request completion
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@...il.com>
---
drivers/block/nbd.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
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);
}
--
1.7.5.2
--
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