netdev - Re: [PATCH net] net/mlx4_en: Force CHECKSUM

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Message-ID: <CANn89iJD3cuzMcue9rKCt6TBxM3OXd8+5YvSe=pb_22m5L_4aw@mail.gmail.com>
Date:   Wed, 6 Feb 2019 12:17:24 -0800
From:   Eric Dumazet <edumazet@...gle.com>
To:     Saeed Mahameed <saeedm@....mellanox.co.il>
Cc:     Saeed Mahameed <saeedm@...lanox.com>,
        Eran Ben Elisha <eranbe@...lanox.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Tariq Toukan <tariqt@...lanox.com>
Subject: Re: [PATCH net] net/mlx4_en: Force CHECKSUM_NONE for short ethernet frames

On Wed, Feb 6, 2019 at 12:15 PM Saeed Mahameed
<saeedm@....mellanox.co.il> wrote:
>
> Ok, just verified, csum complete (cqe->checksum) is provided and valid
> for non-TCP/UDP ip packets, (on specific ConnectX3 HWs)
> e.g. ICMP packets or IP fragments go through csum complete,  that
> being said, looking at the code before my patch.
> when cqe->checksum complete is not valid a IP non-TCP/UDP packet will
> report csum NONE, which means my
> TODO comment is valid even without my patch :).
>
> We can remove the TODO, although i am fine with it if it kept there,
> since it is valid,
> but we must add a future optimization task (to tariq's backlog ;)) for
> IP non-TCP/UDP traffic to check for
> csum unnecessary when csum complete is not an option.
>
>

Thanks for double checking.
You might add more details in the changelog for future generations ;)