Am Mittwoch, 4. Juli 2007 schrieb Rusty Russell:
> +static void try_fill_recv(struct virtnet_info *vi)
> +{
> + struct sk_buff *skb;
> + struct scatterlist sg[MAX_SKB_FRAGS];
> + int num, err;
> +
> + for (;;) {
> + skb = netdev_alloc_skb(vi->ndev, MAX_PACKET_LEN);
> + if (unlikely(!skb))
> + break;
> +
> + skb_put(skb, MAX_PACKET_LEN);
> + num = skb_to_sgvec(skb, sg, 0, skb->len);
> + skb_queue_head(&vi->recv, skb);
> +
> + err = vi->vq_recv->ops->add_buf(vi->vq_recv, sg, 0, num, skb);
> + if (err) {
> + skb_unlink(skb, &vi->recv);
> + kfree_skb(skb);
> + break;
> + }
> + vi->num++;
> + }
Hmm, so it allocates skbs until oom or until add_buf fails, right?
Do you expect the add_buf call to fail if we have enough buffers? Who defines
the amount of buffers we can add via add_buf?
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