netdev - Re: [PATCH net 3/3] virtio-net: enable TSO/checksum offloads for Q-in-Q vlans

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Date:   Fri, 19 May 2017 22:18:20 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Vladislav Yasevich <vyasevich@...il.com>, netdev@...r.kernel.org
Cc:     Vladislav Yasevich <vyasevic@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH net 3/3] virtio-net: enable TSO/checksum offloads for
 Q-in-Q vlans



On 2017年05月18日 21:31, Vladislav Yasevich wrote:
> Since virtio does not provide it's own ndo_features_check handler,
> TSO, and now checksum offload, are disabled for stacked vlans.
> Re-enable the support and let the host take care of it.  This
> restores/improves Guest-to-Guest performance over Q-in-Q vlans.
>
> CC: "Michael S. Tsirkin" <mst@...hat.com>
> CC: Jason Wang <jasowang@...hat.com>
> CC: virtualization@...ts.linux-foundation.org
> Signed-off-by: Vladislav Yasevich <vyasevic@...hat.com>
> ---
>   drivers/net/virtio_net.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 8324a5e..341fb96 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -2028,6 +2028,7 @@ static const struct net_device_ops virtnet_netdev = {
>   	.ndo_poll_controller = virtnet_netpoll,
>   #endif
>   	.ndo_xdp		= virtnet_xdp,
> +	.ndo_features_check	= passthru_features_check,
>   };
>   
>   static void virtnet_config_changed_work(struct work_struct *work)

Acked-by: Jason Wang <jasowang@...hat.com>