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net: Use sk_tx_queue_mapping for connected sockets 

For connected sockets, the first run of dev_pick_tx saves the
calculated txq in sk_tx_queue_mapping. This is not saved if
either the device has a queue select or the socket is not
connected. Next iterations of dev_pick_tx uses the cached value
of sk_tx_queue_mapping.

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Krishna Kumar 2009-10-19 23:50:07 +00:00 committed by David S. Miller
parent ea94ff3b55
commit a4ee3ce329
1 changed files with 18 additions and 6 deletions
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24
net/core/dev.c
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@ -1791,13 +1791,25 @@ EXPORT_SYMBOL(skb_tx_hash);
static struct netdev_queue *dev_pick_tx(struct net_device *dev,
struct sk_buff *skb)
{
const struct net_device_ops *ops = dev->netdev_ops;
u16 queue_index = 0;
u16 queue_index;
struct sock *sk = skb->sk;
if (ops->ndo_select_queue)
queue_index = ops->ndo_select_queue(dev, skb);
else if (dev->real_num_tx_queues > 1)
queue_index = skb_tx_hash(dev, skb);
if (sk_tx_queue_recorded(sk)) {
queue_index = sk_tx_queue_get(sk);
} else {
const struct net_device_ops *ops = dev->netdev_ops;
if (ops->ndo_select_queue) {
queue_index = ops->ndo_select_queue(dev, skb);
} else {
queue_index = 0;
if (dev->real_num_tx_queues > 1)
queue_index = skb_tx_hash(dev, skb);
if (sk && sk->sk_dst_cache)
sk_tx_queue_set(sk, queue_index);
}
}
skb_set_queue_mapping(skb, queue_index);
return netdev_get_tx_queue(dev, queue_index);