Commit b1cb8256 authored Nov 16, 2011 by stephen hemminger Committed by David S. Miller Nov 16, 2011

sky2: reduce default Tx ring size



The default Tx ring size for the sky2 driver is quite large and could
cause excess buffer bloat for many users. The minimum ring size
possible and still allow handling  the worst case packet on 64bit platforms
is 38 which gets rounded up to a power of 2. But most packets only require
a couple of ring elements.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 926d0977

drivers/net/ethernet/marvell/sky2.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -68,7 +68,7 @@
		#define MAX_SKB_TX_LE (2 + (sizeof(dma_addr_t)/sizeof(u32))*(MAX_SKB_FRAGS+1))
		#define TX_MIN_PENDING (MAX_SKB_TX_LE+1)
		#define TX_MAX_PENDING 1024
		#define TX_DEF_PENDING 127
		#define TX_DEF_PENDING 63

		#define TX_WATCHDOG (5 * HZ)
		#define NAPI_WEIGHT 64