netdev - Re: tc offload debug-ability

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Message-ID: <ygnhsfzqpvwd.fsf@nvidia.com>
Date:   Tue, 3 Aug 2021 15:14:58 +0300
From:   Vlad Buslov <vladbu@...dia.com>
To:     Jamal Hadi Salim <jhs@...atatu.com>
CC:     Simon Horman <simon.horman@...igine.com>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...lanox.com>, <netdev@...r.kernel.org>,
        <oss-drivers@...igine.com>,
        Baowen Zheng <baowen.zheng@...igine.com>,
        Louis Peens <louis.peens@...igine.com>,
        "Ido Schimmel" <idosch@...dia.com>, Jiri Pirko <jiri@...nulli.us>,
        Roopa Prabhu <roopa@...dia.com>
Subject: Re: tc offload debug-ability


On Tue 03 Aug 2021 at 15:02, Jamal Hadi Salim <jhs@...atatu.com> wrote:
> I just changed the subject line..
>
> On 2021-08-03 5:57 a.m., Jamal Hadi Salim wrote:
>> On 2021-07-30 7:40 a.m., Vlad Buslov wrote:
>>> On Fri 30 Jul 2021 at 13:17, Jamal Hadi Salim <jhs@...atatu.com> wrote:
>>>> On 2021-07-28 10:46 a.m., Simon Horman wrote:
>> 
>>>
>>> Filters with tunnel_key encap actions can be offloaded/unoffloaded
>>> dynamically based on neigh state (see mlx5e_rep_neigh_update()) and fib
>>> events (see mlx5e_tc_fib_event_work()).
>>>
>> Thanks. Will look and compare against the FIB case.
>> 
>
> So unless i am mistaken Vlad:
> a) there is no way to reflect the  details when someone dumps the rules.
> b) No notifications sent to the control plane (user space) when the
> neighbor updates are offloaded.

Correct.

>
> My comments earlier are inspired by debugging tc offload and by this:
>
> https://patches.linaro.org/cover/378345/
>
> cheers,
> jamal