Re: [PATCH bpf-next 1/6] i40e: introduce lazy Tx completions for AF_XDP zero-copy

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Subject: Re: [PATCH bpf-next 1/6] i40e: introduce lazy Tx completions for AF_XDP zero-copy
From: Jakub Kicinski <kuba@xxxxxxxxxx>
Date: Wed, 4 Nov 2020 15:35:07 -0800
Cc: magnus.karlsson@xxxxxxxxx, bjorn.topel@xxxxxxxxx, ast@xxxxxxxxxx, daniel@xxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, jonathan.lemon@xxxxxxxxx, bpf@xxxxxxxxxxxxxxx, jeffrey.t.kirsher@xxxxxxxxx, anthony.l.nguyen@xxxxxxxxx, maciej.fijalkowski@xxxxxxxxx, maciejromanfijalkowski@xxxxxxxxx, intel-wired-lan@xxxxxxxxxxxxxxxx
In-reply-to: <20201104153320.66cecba8@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>

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?

References:
- [PATCH bpf-next 0/6] xsk: i40e: Tx performance improvements
  - From: Magnus Karlsson
- [PATCH bpf-next 1/6] i40e: introduce lazy Tx completions for AF_XDP zero-copy
  - From: Magnus Karlsson
- Re: [PATCH bpf-next 1/6] i40e: introduce lazy Tx completions for AF_XDP zero-copy
  - From: Jakub Kicinski

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