]> nv-tegra.nvidia Code Review - linux-2.6.git/commitdiff
[NET]: Prefetch dev->qdisc_lock in dev_queue_xmit()
authorEric Dumazet <dada1@cosmosbay.com>
Tue, 27 Sep 2005 22:22:58 +0000 (15:22 -0700)
committerDavid S. Miller <davem@davemloft.net>
Tue, 27 Sep 2005 22:22:58 +0000 (15:22 -0700)
We know the lock is going to be taken.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/dev.c

index 37c881070963aec33f184dac0341f7862877ca3b..9066c874e273b6f3bced25f16b876cd5b85e23f3 100644 (file)
@@ -1259,6 +1259,8 @@ int dev_queue_xmit(struct sk_buff *skb)
                if (skb_checksum_help(skb, 0))
                        goto out_kfree_skb;
 
+       spin_lock_prefetch(&dev->queue_lock);
+
        /* Disable soft irqs for various locks below. Also 
         * stops preemption for RCU. 
         */