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net: dont update dev->trans_start in 10GB drivers

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Followup of commits 9d21493b4b
and 08baf56108
(net: tx scalability works : trans_start)
(net: txq_trans_update() helper)

Now that core network takes care of trans_start updates, dont do it
in drivers themselves, if possible. Multi queue drivers can
avoid one cache miss (on dev->trans_start) in their start_xmit()
handler.

Exceptions are NETIF_F_LLTX drivers (vxge & tehuti)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2009-05-27 19:26:37 +00:00
committed by David S. Miller
parent 3f1f39c42b
commit 28679751a9
16 changed files with 8 additions and 25 deletions
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1
drivers/net/mlx4/en_tx.c
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@@ -819,7 +819,6 @@ int mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
/* Ring doorbell! */
wmb();
writel(ring->doorbell_qpn, mdev->uar_map + MLX4_SEND_DOORBELL);
dev->trans_start = jiffies;
/* Poll CQ here */
mlx4_en_xmit_poll(priv, tx_ind);