netdev - Re: [PATCH net-next 2/8] virtio_net: mergeable xdp: introduce mergeable_xdp

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Message-ID: <CACGkMEv=0gt6LS0HSgKELQqnWfQ2UdFgAKdvh=CLaAPLeNytww@mail.gmail.com>
Date:   Thu, 23 Mar 2023 13:40:43 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Yunsheng Lin <linyunsheng@...wei.com>
Cc:     Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
        "Michael S. Tsirkin" <mst@...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,
        netdev@...r.kernel.org
Subject: Re: [PATCH net-next 2/8] virtio_net: mergeable xdp: introduce mergeable_xdp_prepare

> >
> >>
> >> Also, it seems better to split the xdp_linearize_page() to two functions
> >> as pskb_expand_head() and __skb_linearize() do, one to expand the headroom,
> >> the other one to do the linearizing.
> >
> > No skb here.
>
> I means following the semantics of pskb_expand_head() and __skb_linearize(),
> not to combine the headroom expanding and linearizing into one function as
> xdp_linearize_page() does now if we want a better refoctor result.

Not sure it's worth it, since the use is very specific unless we could
find a case that wants only one of them.

Thanks

>
> >
> >
> >>
>