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authorJesse Brandeburg <jesse.brandeburg@intel.com>2008-07-08 15:52:02 -0700
committerJeff Garzik <jgarzik@redhat.com>2008-07-11 01:20:28 -0400
commitd9fed18bf9090bd0682f3c611c40261a98a2842d (patch)
tree91f8579e3613706dc219f0c0785be2763670836f /drivers/net/ixgb
parent2115a6432911b669bec037686066c7bbc70cc68e (diff)
downloadblackbird-op-linux-d9fed18bf9090bd0682f3c611c40261a98a2842d.tar.gz
blackbird-op-linux-d9fed18bf9090bd0682f3c611c40261a98a2842d.zip
ixgb: add copybreak parameter
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>
Diffstat (limited to 'drivers/net/ixgb')
-rw-r--r--drivers/net/ixgb/ixgb_main.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index bd08e1992140..4e422c4cbe83 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -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) {
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