netdev - Re: [xdp-hints] Re: [PATCH bpf-next v8 00/17] xdp: hints via kfuncs

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Date:   Tue, 24 Jan 2023 12:49:22 +0100
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Alexander Lobakin <alexandr.lobakin@...el.com>,
        Stanislav Fomichev <sdf@...gle.com>
Cc:     Martin KaFai Lau <martin.lau@...ux.dev>, ast@...nel.org,
        daniel@...earbox.net, andrii@...nel.org, song@...nel.org,
        yhs@...com, john.fastabend@...il.com, kpsingh@...nel.org,
        haoluo@...gle.com, jolsa@...nel.org,
        David Ahern <dsahern@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Willem de Bruijn <willemb@...gle.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Anatoly Burakov <anatoly.burakov@...el.com>,
        Magnus Karlsson <magnus.karlsson@...il.com>,
        Maryam Tahhan <mtahhan@...hat.com>, xdp-hints@...-project.net,
        netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [xdp-hints] Re: [PATCH bpf-next v8 00/17] xdp: hints via kfuncs

Alexander Lobakin <alexandr.lobakin@...el.com> writes:

> From: Stanislav Fomichev <sdf@...gle.com>
> Date: Mon, 23 Jan 2023 10:55:52 -0800
>
>> On Mon, Jan 23, 2023 at 10:53 AM Martin KaFai Lau <martin.lau@...ux.dev> wrote:
>>>
>>> On 1/19/23 2:15 PM, Stanislav Fomichev wrote:
>>>> Please see the first patch in the series for the overall
>>>> design and use-cases.
>>>>
>>>> See the following email from Toke for the per-packet metadata overhead:
>>>> https://lore.kernel.org/bpf/20221206024554.3826186-1-sdf@google.com/T/#m49d48ea08d525ec88360c7d14c4d34fb0e45e798
>>>>
>>>> Recent changes:
>>>> - Keep new functions in en/xdp.c, do 'extern mlx5_xdp_metadata_ops' (Tariq)
>>>>
>>>> - Remove mxbuf pointer and use xsk_buff_to_mxbuf (Tariq)
>>>>
>>>> - Clarify xdp_buff vs 'XDP frame' (Jesper)
>>>>
>>>> - Explicitly mention that AF_XDP RX descriptor lacks metadata size (Jesper)
>>>>
>>>> - Drop libbpf_flags/xdp_flags from selftests and use ifindex instead
>>>>    of ifname (due to recent xsk.h refactoring)
>>>
>>> Applied with the minor changes in the selftests discussed in patch 11 and 17.
>>> Thanks!
>> 
>> Awesome, thanks! I was gonna resend around Wed, but thank you for
>> taking care of that!
> Great stuff, congrats! :)

Yeah! Thanks for carrying this forward, Stanislav! :)

-Toke