Subject: [PATCH 2/3] ixgb: use rx copybreak/skb recycle

From: "Kok, Auke" <[email-masked]>
Date: Thu, 25 May 2006 13:26:33 -0700

o use rx copybreak/skb recycle

Signed-off-by: Jesse Brandeburg <[email-masked]>
Signed-off-by: Auke Kok <[email-masked]>
Signed-off-by: John Ronciak <[email-masked]>
---

 drivers/net/ixgb/ixgb_main.c |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index 27034b3..0e23994 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -1990,6 +1990,26 @@ ixgb_clean_rx_irq(struct ixgb_adapter *a
 			goto rxdesc_done;
 		}
 
+		/* code added for copybreak, this should improve
+		 * performance for small packets with large amounts
+		 * of reassembly being done in the stack */
+#define IXGB_CB_LENGTH 256
+		if (length < IXGB_CB_LENGTH) {
+			struct sk_buff *new_skb =
+			    dev_alloc_skb(length + NET_IP_ALIGN);
+			if (new_skb) {
+				skb_reserve(new_skb, NET_IP_ALIGN);
+				new_skb->dev = netdev;
+				memcpy(new_skb->data - NET_IP_ALIGN,
+				       skb->data - NET_IP_ALIGN,
+				       length + NET_IP_ALIGN);
+				/* save the skb in buffer_info as good */
+				buffer_info->skb = skb;
+				skb = new_skb;
+			}
+		}
+		/* end copybreak code */
+
 		/* Good Receive */
 		skb_put(skb, length);

--
Auke Kok <[email-masked]>