[PATCH 1/1] block/nbd: micro-optimization in nbd request completion
From: Chetan Loke <hidden>
Date: 2012-06-06 14:15:42
Also in:
lkml
Subsystem:
block layer, network block device (nbd), the rest · Maintainers:
Jens Axboe, Josef Bacik, Linus Torvalds
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 <redacted> --- 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