diff options
| -rw-r--r-- | drivers/net/virtio_net.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 9a3b85e55ccc..156d76fee164 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -44,6 +44,8 @@ struct virtnet_info /* The skb we couldn't send because buffers were full. */ struct sk_buff *last_xmit_skb; + struct timer_list xmit_free_timer; + /* Number of input buffers, and max we've ever had. */ unsigned int num, max; @@ -240,9 +242,23 @@ static void free_old_xmit_skbs(struct virtnet_info *vi) } } +static void xmit_free(unsigned long data) +{ + struct virtnet_info *vi = (void *)data; + + netif_tx_lock(vi->dev); + + free_old_xmit_skbs(vi); + + if (!skb_queue_empty(&vi->send)) + mod_timer(&vi->xmit_free_timer, jiffies + (HZ/10)); + + netif_tx_unlock(vi->dev); +} + static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb) { - int num; + int num, err; struct scatterlist sg[2+MAX_SKB_FRAGS]; struct virtio_net_hdr *hdr; const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest; @@ -285,7 +301,11 @@ static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb) vnet_hdr_to_sg(sg, skb); num = skb_to_sgvec(skb, sg+1, 0, skb->len) + 1; - return vi->svq->vq_ops->add_buf(vi->svq, sg, num, 0, skb); + err = vi->svq->vq_ops->add_buf(vi->svq, sg, num, 0, skb); + if (!err) + mod_timer(&vi->xmit_free_timer, jiffies + (HZ/10)); + + return err; } static void xmit_tasklet(unsigned long data) @@ -456,6 +476,8 @@ static int virtnet_probe(struct virtio_device *vdev) tasklet_init(&vi->tasklet, xmit_tasklet, (unsigned long)vi); + setup_timer(&vi->xmit_free_timer, xmit_free, (unsigned long)vi); + err = register_netdev(dev); if (err) { pr_debug("virtio_net: registering device failed\n"); @@ -493,6 +515,8 @@ static void virtnet_remove(struct virtio_device *vdev) /* Stop all the virtqueues. */ vdev->config->reset(vdev); + del_timer_sync(&vi->xmit_free_timer); + /* Free our skbs in send and recv queues, if any. */ while ((skb = __skb_dequeue(&vi->recv)) != NULL) { kfree_skb(skb); |