netdev - Re: [RFC bpf-next v2 1/9] net: introduce __init_skb{,_data,

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Message-ID: <6406eae2-4633-9b2a-1101-2de48d29f9dd@gmail.com>
Date:   Wed, 20 Mar 2019 21:44:38 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Stanislav Fomichev <sdf@...gle.com>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org, davem@...emloft.net,
        ast@...nel.org, daniel@...earbox.net, simon.horman@...ronome.com,
        willemb@...gle.com, peterpenkov96@...il.com
Subject: Re: [RFC bpf-next v2 1/9] net: introduce __init_skb{,_data,_shinfo}
 helpers



On 03/20/2019 08:39 PM, Alexei Starovoitov wrote:

> I think you need to convince Dave and Eric that
> above surgery is necessary to do the hack in patch 6 with
> +static DEFINE_PER_CPU(struct sk_buff, bpf_flow_skb);
> 

Yes, this is a huge code churn.

Honestly I believe we are going too far in this series.

> I think the better option it to introduce new prog type that works
> without skb. I think it can be pretty close to shape and form to xdp.
>