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Message-ID: <1413365865.12304.55.camel@edumazet-glaptop2.roam.corp.google.com>
Date: Wed, 15 Oct 2014 02:37:45 -0700
From: Eric Dumazet <eric.dumazet@...il.com>
To: Jason Wang <jasowang@...hat.com>
Cc: rusty@...tcorp.com.au, mst@...hat.com,
virtualization@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
davem@...emloft.net
Subject: Re: [RFC PATCH net-next 5/6] virtio-net: enable tx interrupt
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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