netdev - Re: [PATCH net-next 00/12] mlxsw: Preparations for XDP support

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Message-ID: <CAADnVQKMN4+Zg9ZG4FpH9pJw4KdmwWmT2d4BiJgHUUQ-Hd7OkQ@mail.gmail.com>
Date: Tue, 4 Feb 2025 15:56:10 +0000
From: Alexei Starovoitov <alexei.starovoitov@...il.com>
To: Petr Machata <petrm@...dia.com>
Cc: "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew+netdev@...n.ch>, 
	Network Development <netdev@...r.kernel.org>, Amit Cohen <amcohen@...dia.com>, 
	Ido Schimmel <idosch@...dia.com>, Alexei Starovoitov <ast@...nel.org>, 
	Daniel Borkmann <daniel@...earbox.net>, Jesper Dangaard Brouer <hawk@...nel.org>, 
	John Fastabend <john.fastabend@...il.com>, bpf <bpf@...r.kernel.org>, mlxsw@...dia.com
Subject: Re: [PATCH net-next 00/12] mlxsw: Preparations for XDP support

On Tue, Feb 4, 2025 at 11:06 AM Petr Machata <petrm@...dia.com> wrote:
>
> Amit Cohen writes:
>
> A future patch set will add support for XDP in mlxsw driver. This set adds
> some preparations.

Why?
What is the goal here?
My understanding is that mlxsw is a hw switch and skb-s are used to
implement tap functionality for few listeners.
The volume of such packets is supposed to be small.
Even if XDP is added there is a huge mismatch in packet rates.
Hence the question. Why bother?