netdev - Re: [PATCH v2 net-next 1/4] vhost_net: Rename local variables in vhost_net_rx_peek_head

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Date:   Tue, 3 Jul 2018 17:03:30 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Toshiaki Makita <makita.toshiaki@....ntt.co.jp>,
        "David S. Miller" <davem@...emloft.net>,
        "Michael S. Tsirkin" <mst@...hat.com>
Cc:     netdev@...r.kernel.org, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        Tonghao Zhang <xiangxia.m.yue@...il.com>
Subject: Re: [PATCH v2 net-next 1/4] vhost_net: Rename local variables in
 vhost_net_rx_peek_head_len



On 2018年07月03日 15:31, Toshiaki Makita wrote:
> So we can easily see which variable is for which, tx or rx.
>
> Signed-off-by: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
> ---
>   drivers/vhost/net.c | 34 +++++++++++++++++-----------------
>   1 file changed, 17 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
> index 29756d8..3939c50 100644
> --- a/drivers/vhost/net.c
> +++ b/drivers/vhost/net.c
> @@ -647,39 +647,39 @@ static void vhost_rx_signal_used(struct vhost_net_virtqueue *nvq)
>   
>   static int vhost_net_rx_peek_head_len(struct vhost_net *net, struct sock *sk)
>   {
> -	struct vhost_net_virtqueue *rvq = &net->vqs[VHOST_NET_VQ_RX];
> -	struct vhost_net_virtqueue *nvq = &net->vqs[VHOST_NET_VQ_TX];
> -	struct vhost_virtqueue *vq = &nvq->vq;
> +	struct vhost_net_virtqueue *rnvq = &net->vqs[VHOST_NET_VQ_RX];
> +	struct vhost_net_virtqueue *tnvq = &net->vqs[VHOST_NET_VQ_TX];
> +	struct vhost_virtqueue *tvq = &tnvq->vq;
>   	unsigned long uninitialized_var(endtime);
> -	int len = peek_head_len(rvq, sk);
> +	int len = peek_head_len(rnvq, sk);
>   
> -	if (!len && vq->busyloop_timeout) {
> +	if (!len && tvq->busyloop_timeout) {
>   		/* Flush batched heads first */
> -		vhost_rx_signal_used(rvq);
> +		vhost_rx_signal_used(rnvq);
>   		/* Both tx vq and rx socket were polled here */
> -		mutex_lock_nested(&vq->mutex, 1);
> -		vhost_disable_notify(&net->dev, vq);
> +		mutex_lock_nested(&tvq->mutex, 1);
> +		vhost_disable_notify(&net->dev, tvq);
>   
>   		preempt_disable();
> -		endtime = busy_clock() + vq->busyloop_timeout;
> +		endtime = busy_clock() + tvq->busyloop_timeout;
>   
>   		while (vhost_can_busy_poll(&net->dev, endtime) &&
>   		       !sk_has_rx_data(sk) &&
> -		       vhost_vq_avail_empty(&net->dev, vq))
> +		       vhost_vq_avail_empty(&net->dev, tvq))
>   			cpu_relax();
>   
>   		preempt_enable();
>   
> -		if (!vhost_vq_avail_empty(&net->dev, vq))
> -			vhost_poll_queue(&vq->poll);
> -		else if (unlikely(vhost_enable_notify(&net->dev, vq))) {
> -			vhost_disable_notify(&net->dev, vq);
> -			vhost_poll_queue(&vq->poll);
> +		if (!vhost_vq_avail_empty(&net->dev, tvq)) {
> +			vhost_poll_queue(&tvq->poll);
> +		} else if (unlikely(vhost_enable_notify(&net->dev, tvq))) {
> +			vhost_disable_notify(&net->dev, tvq);
> +			vhost_poll_queue(&tvq->poll);
>   		}
>   
> -		mutex_unlock(&vq->mutex);
> +		mutex_unlock(&tvq->mutex);
>   
> -		len = peek_head_len(rvq, sk);
> +		len = peek_head_len(rnvq, sk);
>   	}
>   
>   	return len;

Acked-by: Jason Wang <jasowang@...hat.com>