ixgb: use rx copybreak/skb recycle

o use rx copybreak/skb recycle

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index 27034b3ba80b..0e23994a6a76 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 *adapter)
                         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);