On Fri, Jul 29, 2011 at 03:55:31PM -0700, Shirley Ma wrote:
> Resubmit it with a typo fix.
>
> Signed-off-by: Shirley Ma <xma@xxxxxxxxxx>
> ---
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 0c7321c..c8201d4 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -429,6 +429,22 @@ static int add_recvbuf_mergeable(struct virtnet_info *vi, gfp_t gfp)
> return err;
> }
>
> +static int fill_one(struct virtnet_info *vi, gfp_t gfp)
> +{
> + int err;
> +
> + if (vi->mergeable_rx_bufs)
> + err = add_recvbuf_mergeable(vi, gfp);
> + else if (vi->big_packets)
> + err = add_recvbuf_big(vi, gfp);
> + else
> + err = add_recvbuf_small(vi, gfp);
> +
> + if (err >= 0)
> + ++vi->num;
> + return err;
> +}
> +
> /* Returns false if we couldn't fill entirely (OOM). */
> static bool try_fill_recv(struct virtnet_info *vi, gfp_t gfp)
> {
> @@ -436,17 +452,10 @@ static bool try_fill_recv(struct virtnet_info *vi, gfp_t gfp)
> bool oom;
>
> do {
> - if (vi->mergeable_rx_bufs)
> - err = add_recvbuf_mergeable(vi, gfp);
> - else if (vi->big_packets)
> - err = add_recvbuf_big(vi, gfp);
> - else
> - err = add_recvbuf_small(vi, gfp);
> -
> + err = fill_one(vi, gfp);
> oom = err == -ENOMEM;
> if (err < 0)
> break;
> - ++vi->num;
> } while (err > 0);
> if (unlikely(vi->num > vi->max))
> vi->max = vi->num;
> @@ -506,13 +515,13 @@ again:
> receive_buf(vi->dev, buf, len);
> --vi->num;
> received++;
> - }
> -
> - if (vi->num < vi->max / 2) {
> - if (!try_fill_recv(vi, GFP_ATOMIC))
> + if (fill_one(vi, GFP_ATOMIC) < 0)
> schedule_delayed_work(&vi->refill, 0);
If we get a large packet, we might add less that what we removed from
the ring. Isn't this a problem?
> }
>
> + /* notify buffers are refilled */
> + virtqueue_kick(vi->rvq);
> +
> /* Out of packets? */
> if (received < budget) {
> napi_complete(napi);
>
>
--
MST
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