提交 2d7ceece 编写于 作者: E Eric Dumazet 提交者: David S. Miller

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

We know the lock is going to be taken.
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 bc8dfcb9
...@@ -1259,6 +1259,8 @@ int dev_queue_xmit(struct sk_buff *skb) ...@@ -1259,6 +1259,8 @@ int dev_queue_xmit(struct sk_buff *skb)
if (skb_checksum_help(skb, 0)) if (skb_checksum_help(skb, 0))
goto out_kfree_skb; goto out_kfree_skb;
spin_lock_prefetch(&dev->queue_lock);
/* Disable soft irqs for various locks below. Also /* Disable soft irqs for various locks below. Also
* stops preemption for RCU. * stops preemption for RCU.
*/ */
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册