xps: Improvements in TX queue selection

[net-next-2.6.git] / net / core / dev.c

diff --git a/net/core/dev.c b/net/core/dev.c
index 381b8e280162f55b654fae40576fcaf86b8f3b56..7b17674a29ec77f18247ddd0cc498d93c59ce85f 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2148,20 +2148,24 @@ static struct netdev_queue *dev_pick_tx(struct net_device *dev,
        int queue_index;
        const struct net_device_ops *ops = dev->netdev_ops;
 
-       if (ops->ndo_select_queue) {
+       if (dev->real_num_tx_queues == 1)
+               queue_index = 0;
+       else if (ops->ndo_select_queue) {
                queue_index = ops->ndo_select_queue(dev, skb);
                queue_index = dev_cap_txqueue(dev, queue_index);
        } else {
                struct sock *sk = skb->sk;
                queue_index = sk_tx_queue_get(sk);
-               if (queue_index < 0 || queue_index >= dev->real_num_tx_queues) {
 
-                       queue_index = 0;
-                       if (dev->real_num_tx_queues > 1)
-                               queue_index = skb_tx_hash(dev, skb);
+               if (queue_index < 0 || skb->ooo_okay ||
+                   queue_index >= dev->real_num_tx_queues) {
+                       int old_index = queue_index;
 
-                       if (sk) {
-                               struct dst_entry *dst = rcu_dereference_check(sk->sk_dst_cache, 1);
+                       queue_index = skb_tx_hash(dev, skb);
+
+                       if (queue_index != old_index && sk) {
+                               struct dst_entry *dst =
+                                   rcu_dereference_check(sk->sk_dst_cache, 1);
 
                                if (dst && skb_dst(skb) == dst)
                                        sk_tx_queue_set(sk, queue_index);