netdev - [PATCH] igb: reduce Rx header size

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Message-ID: <1343920538.9299.200.camel@edumazet-glaptop>
Date:	Thu, 02 Aug 2012 17:15:38 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc:	Alexander Duyck <alexander.h.duyck@...el.com>,
	netdev <netdev@...r.kernel.org>
Subject: [PATCH] igb: reduce Rx header size

From: Eric Dumazet <edumazet@...gle.com>

Reduce skb truesize by 256 bytes.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Cc: Alexander Duyck <alexander.h.duyck@...el.com>
---
Tested on my machine without any problem

 drivers/net/ethernet/intel/igb/igb.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index 9e572dd..0c9f62c 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -131,9 +131,9 @@ struct vf_data_storage {
 #define MAXIMUM_ETHERNET_VLAN_SIZE 1522
 
 /* Supported Rx Buffer Sizes */
-#define IGB_RXBUFFER_512   512
+#define IGB_RXBUFFER_256   256
 #define IGB_RXBUFFER_16384 16384
-#define IGB_RX_HDR_LEN     IGB_RXBUFFER_512
+#define IGB_RX_HDR_LEN     IGB_RXBUFFER_256
 
 /* How many Tx Descriptors do we need to call netif_wake_queue ? */
 #define IGB_TX_QUEUE_WAKE	16


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