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Commit 8fc2f995 authored by Matt Carlson's avatar Matt Carlson Committed by David S. Miller
Browse files

tg3: Raise the jumbo frame BD flag threshold 



The current transmit routines set the jumbo frame BD flag too
aggressively.  This can reduce performance for common cases.  This patch
raises the jumbo flag threshold to 1518, up from 1500.

Signed-off-by: default avatarMatt Carlson <mcarlson@broadcom.com>
Reviewed-by: default avatarBenjamin Li <benli@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ca44ac38

drivers/net/tg3.c

+2 −2
Original line number Diff line number Diff line
@@ -5761,7 +5761,7 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, 
	dma_unmap_addr_set(&tnapi->tx_buffers[entry], mapping, mapping);



	if ((tp->tg3_flags3 & TG3_FLG3_USE_JUMBO_BDFLAG) &&

	    !mss && skb->len > ETH_DATA_LEN)

	    !mss && skb->len > VLAN_ETH_FRAME_LEN)

		base_flags |= TXD_FLAG_JMB_PKT;



	tg3_set_txd(tnapi, entry, mapping, len, base_flags,
@@ -5995,7 +5995,7 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb, 
#endif



	if ((tp->tg3_flags3 & TG3_FLG3_USE_JUMBO_BDFLAG) &&

	    !mss && skb->len > ETH_DATA_LEN)

	    !mss && skb->len > VLAN_ETH_FRAME_LEN)

		base_flags |= TXD_FLAG_JMB_PKT;



	len = skb_headlen(skb);