netdev - Re: [PATCH net-next 0/8] virtio

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Date:   Wed, 22 Mar 2023 11:40:56 +0800
From:   Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     netdev@...r.kernel.org, Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        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-foundation.org, bpf@...r.kernel.org
Subject: Re: [PATCH net-next 0/8] virtio_net: refactor xdp codes

On Tue, 21 Mar 2023 23:34:43 -0400, "Michael S. Tsirkin" <mst@...hat.com> wrote:
> On Wed, Mar 22, 2023 at 11:03:00AM +0800, Xuan Zhuo wrote:
> > Due to historical reasons, the implementation of XDP in virtio-net is relatively
> > chaotic. For example, the processing of XDP actions has two copies of similar
> > code. Such as page, xdp_page processing, etc.
> >
> > The purpose of this patch set is to refactor these code. Reduce the difficulty
> > of subsequent maintenance. Subsequent developers will not introduce new bugs
> > because of some complex logical relationships.
> >
> > In addition, the supporting to AF_XDP that I want to submit later will also need
> > to reuse the logic of XDP, such as the processing of actions, I don't want to
> > introduce a new similar code. In this way, I can reuse these codes in the
> > future.
> >
> > Please review.
> >
> > Thanks.
>
> I really want to see that code make progress though.

I want to know, you refer to virtio-net + AF_XDP or refactor for XDP.

> Would it make sense to merge this one through the virtio tree?

There are some small problems that we merge this patch-set to Virtio Tree
directly.

Thanks.

>
> Then you will have all the pieces in one place and try to target
> next linux.
>
>
> > Xuan Zhuo (8):
> >   virtio_net: mergeable xdp: put old page immediately
> >   virtio_net: mergeable xdp: introduce mergeable_xdp_prepare
> >   virtio_net: introduce virtnet_xdp_handler() to seprate the logic of
> >     run xdp
> >   virtio_net: separate the logic of freeing xdp shinfo
> >   virtio_net: separate the logic of freeing the rest mergeable buf
> >   virtio_net: auto release xdp shinfo
> >   virtio_net: introduce receive_mergeable_xdp()
> >   virtio_net: introduce receive_small_xdp()
> >
> >  drivers/net/virtio_net.c | 615 +++++++++++++++++++++++----------------
> >  1 file changed, 357 insertions(+), 258 deletions(-)
> >
> > --
> > 2.32.0.3.g01195cf9f
>