diff -Naur linux-2.6.9.orrig/drivers/net/natsemi.c linux-2.6.9/drivers/net/natsemi.c
--- linux-2.6.9.orrig/drivers/net/natsemi.c	2004-10-18 21:53:08.000000000 +0000
+++ linux-2.6.9/drivers/net/natsemi.c	2004-12-01 02:53:50.000000000 +0000
@@ -184,8 +184,8 @@
 static int debug = -1;
 
 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
-static int max_interrupt_work = 20;
-static int mtu;
+static int max_interrupt_work = 40;
+static int mtu = 0;
 
 /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
    This chip uses a 512 element hash table based on the Ethernet CRC.  */
@@ -193,7 +193,10 @@
 
 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
    Setting to > 1518 effectively disables this feature. */
-static int rx_copybreak;
+static int rx_copybreak = 0;
+
+/* Set the interrupt holdoff value in usec. */
+static int intr_holdoff_value = 500;
 
 /* Used to pass the media type, etc.
    Both 'options[]' and 'full_duplex[]' should exist for driver
@@ -211,9 +214,9 @@
    Making the Tx ring too large decreases the effectiveness of channel
    bonding and packet priority.
    There are no ill effects from too-large receive rings. */
-#define TX_RING_SIZE	16
-#define TX_QUEUE_LEN	10 /* Limit ring entries actually used, min 4. */
-#define RX_RING_SIZE	32
+#define TX_RING_SIZE	32
+#define TX_QUEUE_LEN	28 /* Limit ring entries actually used, min 4. */
+#define RX_RING_SIZE	64
 
 /* Operational parameters that usually are not changed. */
 /* Time in jiffies before concluding the transmitter is hung. */
@@ -255,6 +258,7 @@
 MODULE_PARM(mtu, "i");
 MODULE_PARM(debug, "i");
 MODULE_PARM(rx_copybreak, "i");
+MODULE_PARM(intr_holdoff_value, "i");
 MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
 MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
 MODULE_PARM_DESC(max_interrupt_work, 
@@ -263,6 +267,8 @@
 MODULE_PARM_DESC(debug, "DP8381x default debug level");
 MODULE_PARM_DESC(rx_copybreak, 
 	"DP8381x copy breakpoint for copy-only-tiny-frames");
+MODULE_PARM_DESC(intr_holdoff_value, 
+	"DP83816 interrupt holdoff in usec (DP83816 only)");
 MODULE_PARM_DESC(options, 
 	"DP8381x: Bits 0-3: media type, bit 17: full duplex");
 MODULE_PARM_DESC(full_duplex, "DP8381x full duplex setting(s) (1)");
@@ -633,6 +639,11 @@
 #define PHY_ADDR_NONE		32
 #define PHY_ADDR_INTERNAL	1
 
+enum IntrHoldoff_bits {
+	InteHoldoffTime		= 0xff,
+	InteHoldoffControl	= 0x100,
+};
+
 /* values we might find in the silicon revision register */
 #define SRR_DP83815_C	0x0302
 #define SRR_DP83815_D	0x0403
@@ -2163,6 +2174,7 @@
 	void __iomem * ioaddr = ns_ioaddr(dev);
 	int boguscnt = max_interrupt_work;
 	unsigned int handled = 0;
+ 	int was_rx = 0;
 
 	if (np->hands_off)
 		return IRQ_NONE;
@@ -2183,6 +2195,7 @@
 		if (intr_status &
 		   (IntrRxDone | IntrRxIntr | RxStatusFIFOOver |
 		    IntrRxErr | IntrRxOverrun)) {
+			was_rx++;
 			netdev_rx(dev);
 		}
 
@@ -2207,6 +2220,13 @@
 		}
 	} while (1);
 
+        if (was_rx && (np->srr >= SRR_DP83816_A4))
+          {
+            /* set interrupt hold off. (only in DP83816) */
+            writel(((intr_holdoff_value/100) & InteHoldoffTime),
+                   ioaddr + IntrHoldoff);
+          }
+
 	if (netif_msg_intr(np))
 		printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name);