On Mon, Jan 17, 2011 at 04:11:17PM +0800, Jason Wang wrote:
> We can use lock_sock_fast() instead of lock_sock() in order to get
> speedup in peek_head_len().
>
> Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
Queued for 2.6.39, thanks everyone.
> ---
> drivers/vhost/net.c | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
> index c32a2e4..50b622a 100644
> --- a/drivers/vhost/net.c
> +++ b/drivers/vhost/net.c
> @@ -211,12 +211,12 @@ static int peek_head_len(struct sock *sk)
> {
> struct sk_buff *head;
> int len = 0;
> + bool slow = lock_sock_fast(sk);
>
> - lock_sock(sk);
> head = skb_peek(&sk->sk_receive_queue);
> if (head)
> len = head->len;
> - release_sock(sk);
> + unlock_sock_fast(sk, slow);
> return len;
> }
>
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