netdev - Re: [PATCH bpf-next 1/6] i40e: introduce lazy Tx completions for AF

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Message-ID: <20201104153507.5df7c8d6@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Wed, 4 Nov 2020 15:35:07 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Magnus Karlsson <magnus.karlsson@...il.com>
Cc:     magnus.karlsson@...el.com, bjorn.topel@...el.com, ast@...nel.org,
        daniel@...earbox.net, netdev@...r.kernel.org,
        jonathan.lemon@...il.com, bpf@...r.kernel.org,
        jeffrey.t.kirsher@...el.com, anthony.l.nguyen@...el.com,
        maciej.fijalkowski@...el.com, maciejromanfijalkowski@...il.com,
        intel-wired-lan@...ts.osuosl.org
Subject: Re: [PATCH bpf-next 1/6] i40e: introduce lazy Tx completions for
 AF_XDP zero-copy

On Wed, 4 Nov 2020 15:33:20 -0800 Jakub Kicinski wrote:
> I feel like this needs a big fat warning somewhere.
> 
> It's perfectly fine to never complete TCP packets,

s/TCP/normal XDP/, sorry

> but AF_XDP could be used to implement protocols in user space. What
> if someone wants to implement something like TSQ?