netdev - Re: [PATCH net-next 02/13] sk_buff: add skb extension infrastructure

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Date:   Wed, 12 Dec 2018 12:17:42 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Florian Westphal <fw@...len.de>,
        Eric Dumazet <eric.dumazet@...il.com>
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net-next 02/13] sk_buff: add skb extension infrastructure

On 12/12/2018 10:44 AM, Florian Westphal wrote:

> We could do that, its probably enough for mptcp needs.
> This would keep nf_bridge and secpath pointers as-is and increase
> skb truesize.
> 
> If you prefer that, ok, but I don't see why we can't unify them behind
> a single layer?
> 

Well, for a start we do not use nf_brifge or secpath.

XDP is all about not unifying because unifying has a cost.

Do we really want to slow down the stack just because MPTCP is coming ?