From: Eilon Greenstein <eilong@broadcom.com>
Date: Wed, 12 Aug 2009 08:23:20 +0000 (+0000)
Subject: bnx2x: Prefetch the page containing the BD descriptor
X-Git-Tag: v2.6.32-rc1~703^2~403
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=619e7a66b515f5f6b1cbe6f378f6a4ca3a65ac52;p=karo-tx-linux.git

bnx2x: Prefetch the page containing the BD descriptor

Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index 88f30d254095..bdc2e71f491c 100644
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -1498,6 +1498,13 @@ static int bnx2x_rx_int(struct bnx2x_fastpath *fp, int budget)
 		bd_prod = RX_BD(bd_prod);
 		bd_cons = RX_BD(bd_cons);
 
+		/* Prefetch the page containing the BD descriptor
+		   at producer's index. It will be needed when new skb is
+		   allocated */
+		prefetch((void *)(PAGE_ALIGN((unsigned long)
+					     (&fp->rx_desc_ring[bd_prod])) -
+				  PAGE_SIZE + 1));
+
 		cqe = &fp->rx_comp_ring[comp_ring_cons];
 		cqe_fp_flags = cqe->fast_path_cqe.type_error_flags;