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ixgb: add copybreak parameter

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copybreak code was already in the driver, allow the user to turn it
off if they don't like it.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Jesse Brandeburg 2008-07-08 15:52:02 -07:00 committed by Jeff Garzik
parent 2115a64329
commit d9fed18bf9
1 changed files with 7 additions and 2 deletions
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9
drivers/net/ixgb/ixgb_main.c
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@ -40,6 +40,12 @@ static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";
const char ixgb_driver_version[] = DRV_VERSION;
static const char ixgb_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
#define IXGB_CB_LENGTH 256
static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
module_param(copybreak, uint, 0644);
MODULE_PARM_DESC(copybreak,
"Maximum size of packet that is copied to a new buffer on receive");
/* ixgb_pci_tbl - PCI Device ID Table
*
* Wildcard entries (PCI_ANY_ID) should come last
@ -1976,8 +1982,7 @@ ixgb_clean_rx_irq(struct ixgb_adapter *adapter)
/* 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) {
if (length < copybreak) {
struct sk_buff *new_skb =
netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
if (new_skb) {