On Wed, 2014-10-15 at 15:25 +0800, Jason Wang wrote:
...
> +static int free_old_xmit_skbs(struct send_queue *sq, int budget)
> +{
> + struct sk_buff *skb;
> + unsigned int len;
> + struct virtnet_info *vi = sq->vq->vdev->priv;
> + struct virtnet_stats *stats = this_cpu_ptr(vi->stats);
> + u64 tx_bytes = 0, tx_packets = 0;
> +
> + while (tx_packets < budget &&
> + (skb = virtqueue_get_buf(sq->vq, &len)) != NULL) {
> + pr_debug("Sent skb %p\n", skb);
> +
> + tx_bytes += skb->len;
> + tx_packets++;
> +
> + dev_kfree_skb_any(skb);
> + }
> +
> + u64_stats_update_begin(&stats->tx_syncp);
> + stats->tx_bytes += tx_bytes;
> + stats->tx_packets =+ tx_packets;
stats->tx_packets += tx_packets;
> + u64_stats_update_end(&stats->tx_syncp);
> +
> + return tx_packets;
> +}
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