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

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Message-ID: <CALzJLG_rOaeqPzzMa6pRQK2HgjvNoigveMiamZJdw1z0BiCg0Q@mail.gmail.com>
Date:   Wed, 6 Feb 2019 12:23:04 -0800
From:   Saeed Mahameed <saeedm@....mellanox.co.il>
To:     Eric Dumazet <edumazet@...gle.com>
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 12:17 PM Eric Dumazet <edumazet@...gle.com> wrote:
>
> 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 ;)

Great, I will do that, we will post V2,

Thank you Eric.