netdev - Re: [PATCH net-next 00/20] netkit: Support for io_uring zero-copy and AF

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Message-ID: <20250922185908.3305137e@kernel.org>
Date: Mon, 22 Sep 2025 18:59:08 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Daniel Borkmann <daniel@...earbox.net>
Cc: netdev@...r.kernel.org, bpf@...r.kernel.org, davem@...emloft.net,
 razor@...ckwall.org, pabeni@...hat.com, willemb@...gle.com,
 sdf@...ichev.me, john.fastabend@...il.com, martin.lau@...nel.org,
 jordan@...fe.io, maciej.fijalkowski@...el.com, magnus.karlsson@...el.com
Subject: Re: [PATCH net-next 00/20] netkit: Support for io_uring zero-copy
 and AF_XDP

On Fri, 19 Sep 2025 23:31:33 +0200 Daniel Borkmann wrote:
> We have implemented support for this concept in netkit and tested the
> latter against Nvidia ConnectX-6 (mlx5) as well as Broadcom BCM957504
> (bnxt_en) 100G NICs. For more details see the individual patches.

at high level

 - not sure how instance locking is going to work here
 - integration with other queue related APIs is missing (stats and
   upcoming config API)
 - the model of "allocating a queue" needs careful thought, the model
   of bumping the real num rx on the remote is fine here but it will
   not work for real HW queue alloc
 - I'd have expected more of the code to live in the core vs so much
   handling in netkit
 - we need selftests (while the sample is unnecessary)
 - last but not least - I recommend
   https://lore.kernel.org/all/20250912095730.1efaac16@kernel.org/
   ;)