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sky2: reduce default Tx ring size

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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>
This commit is contained in:
stephen hemminger 2011-11-16 13:42:58 +00:00 committed by David S. Miller
parent 926d0977b2
commit b1cb825662
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/marvell/sky2.c
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@ -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