netdev - Re: [net-next 00/12][pull request] Intel Wired LAN Driver Updates 2018-06-04

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Message-ID: <CAKgT0UdekKLETPDg0Qy58bckFZTST1vXUkOSCz40CoZ1sC-=KA@mail.gmail.com>
Date:   Mon, 4 Jun 2018 15:02:31 -0700
From:   Alexander Duyck <alexander.duyck@...il.com>
To:     David Miller <davem@...emloft.net>,
        Björn Töpel <bjorn.topel@...el.com>,
        "Karlsson, Magnus" <magnus.karlsson@...el.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <borkmann@...earbox.net>
Cc:     Or Gerlitz <gerlitz.or@...il.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Netdev <netdev@...r.kernel.org>
Subject: Re: [net-next 00/12][pull request] Intel Wired LAN Driver Updates 2018-06-04

On Mon, Jun 4, 2018 at 2:27 PM, David Miller <davem@...emloft.net> wrote:
> From: Or Gerlitz <gerlitz.or@...il.com>
> Date: Tue, 5 Jun 2018 00:11:35 +0300
>
>> Just to make sure, is the AF_XDP ZC (Zero Copy) UAPI going to be
>> merged for this window -- AFAIU from [1], it's still under
>> examination/development/research for non Intel HWs, am I correct or
>> this is going to get in now?
>
> All of the pending AF_XDP changes will be merged this merge window.
>
> I think Intel folks need to review things as fast as possible because
> I pretty much refuse to revert the series or disable it in Kconfig at
> this point.
>
> Thank you.

My understanding of things is that the current AF_XDP patches were
going to be updated to have more of a model agnostic API such that
they would work for either the "typewriter" mode or the descriptor
ring based approach. The current plan was to have the zero copy
patches be a follow-on after the vendor agnostic API bits in the
descriptors and such had been sorted out. I believe you guys have the
descriptor fixes already right?

In my opinion the i40e code isn't mature enough yet to really go into
anything other than maybe net-next in a couple weeks. We are going to
need a while to get adequate testing in order to flush out all the
bugs and performance regressions we are likely to see coming out of
this change.

- Alex