[NET]: Prefetch dev->qdisc_lock in dev_queue_xmit()

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>
mariux64 · Sep 27, 2005 · 2d7ceec · 2d7ceec
1 parent bc8dfcb
commit 2d7ceec
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/net/core/dev.c b/net/core/dev.c
@@ -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. 
 	 */