[PATCH 2.6 2/9] ixgb: Limit number of Rx descriptors to 512
From: Ganesh Venkatesan <hidden>
Date: 2005-01-07 01:23:02
Signed-off-by: Ganesh Venkatesan <redacted> diff -up net-drivers-2.6/drivers/net/ixgb/ixgb.h net-drivers-2.6/drivers/net/ixgb.new/ixgb.h
--- net-drivers-2.6/drivers/net/ixgb/ixgb.h 2005-01-05 17:13:27.000000000 -0800
+++ net-drivers-2.6/drivers/net/ixgb.new/ixgb.h 2005-01-05 17:13:28.000000000 -0800@@ -91,9 +91,14 @@ struct ixgb_adapter; #define MAX_TXD 4096 #define MIN_TXD 64 -#define DEFAULT_RXD 1024 -#define MAX_RXD 4096 #define MIN_RXD 64 +/* hardware cannot reliably support more than 512 descriptors owned by + * hardware descriptor cache otherwise an unreliable ring under heavy + * recieve load may result */ +/* #define DEFAULT_RXD 1024 */ +/* #define MAX_RXD 4096 */ +#define DEFAULT_RXD 512 +#define MAX_RXD 512 /* Supported Rx Buffer Sizes */ #define IXGB_RXBUFFER_2048 2048