netdev - Re: [PATCH net-next v6 10/10] virtio_net: xsk: rx: free the unused xsk buffer

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Message-ID: <38db3facdfefbefecd367ccce2e9b094d0b0314d.camel@redhat.com>
Date: Thu, 20 Jun 2024 12:46:24 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, netdev@...r.kernel.org
Cc: "Michael S. Tsirkin" <mst@...hat.com>, Jason Wang <jasowang@...hat.com>,
  Eugenio Pérez <eperezma@...hat.com>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski
 <kuba@...nel.org>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann
 <daniel@...earbox.net>, Jesper Dangaard Brouer <hawk@...nel.org>, John
 Fastabend <john.fastabend@...il.com>,  virtualization@...ts.linux.dev,
 bpf@...r.kernel.org
Subject: Re: [PATCH net-next v6 10/10] virtio_net: xsk: rx: free the unused
 xsk buffer

On Tue, 2024-06-18 at 15:56 +0800, Xuan Zhuo wrote:
> Release the xsk buffer, when the queue is releasing or the queue is
> resizing.
> 
> Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
> ---
>  drivers/net/virtio_net.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index cfa106aa8039..33695b86bd99 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -967,6 +967,11 @@ static void virtnet_rq_unmap_free_buf(struct virtqueue *vq, void *buf)
>  
>  	rq = &vi->rq[i];
>  
> +	if (rq->xsk.pool) {
> +		xsk_buff_free((struct xdp_buff *)buf);
> +		return;
> +	}
> +
>  	if (!vi->big_packets || vi->mergeable_rx_bufs)
>  		virtnet_rq_unmap(rq, buf, 0);

I'm under the impression this should be squashed in a previous patch,
likely "virtio_net: xsk: bind/unbind xsk for rx"

Thanks,

Paolo