netdev - Re: [PATCH net 6/7] virtio_net: Use xdp_return_frame to free xdp

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Message-ID: <fce18995-52c8-dadd-bab5-4683686e46a8@redhat.com>
Date:   Thu, 17 Jan 2019 20:56:39 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Toshiaki Makita <makita.toshiaki@....ntt.co.jp>,
        "David S. Miller" <davem@...emloft.net>,
        "Michael S. Tsirkin" <mst@...hat.com>
Cc:     netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        Jesper Dangaard Brouer <brouer@...hat.com>
Subject: Re: [PATCH net 6/7] virtio_net: Use xdp_return_frame to free
 xdp_frames on destroying vqs


On 2019/1/17 下午7:20, Toshiaki Makita wrote:
> put_page() can work as a fallback for freeing xdp_frames, but the
> appropriate way is to use xdp_return_frame().
>
> Fixes: cac320c850ef ("virtio_net: convert to use generic xdp_frame and xdp_return_frame API")
> Signed-off-by: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
> ---
>   drivers/net/virtio_net.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index ae93f0e..996de69 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -2668,7 +2668,7 @@ static void free_unused_bufs(struct virtnet_info *vi)
>   			if (!is_xdp_raw_buffer_queue(vi, i))
>   				dev_kfree_skb(buf);
>   			else
> -				put_page(virt_to_head_page(buf));
> +				xdp_return_frame(buf);
>   		}
>   	}
>   


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