netdev - Re: [patch net-next v2 10/10] net: sched: add termination action to allow goto chain

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Date:   Tue, 16 May 2017 08:46:26 -0400
From:   Jamal Hadi Salim <jhs@...atatu.com>
To:     Daniel Borkmann <daniel@...earbox.net>,
        Jiri Pirko <jiri@...nulli.us>
Cc:     netdev@...r.kernel.org, davem@...emloft.net,
        xiyou.wangcong@...il.com, dsa@...ulusnetworks.com,
        edumazet@...gle.com, stephen@...workplumber.org,
        alexander.h.duyck@...el.com, simon.horman@...ronome.com,
        mlxsw@...lanox.com, alexei.starovoitov@...il.com
Subject: Re: [patch net-next v2 10/10] net: sched: add termination action to
 allow goto chain

On 17-05-16 03:59 AM, Daniel Borkmann wrote:
> On 05/16/2017 06:43 AM, Jiri Pirko wrote:
>> Mon, May 15, 2017 at 10:02:08PM CEST, daniel@...earbox.net wrote:

[..]
>>>
>>> Given this goto chain feature is pretty much only interesting for hw
>>> offloads, can we move this further away from the sw fast path to not
>>> add up to the cost per packet? (I doubt anyone is using
>>> TC_ACT_RECLASSIFY
>>> in sw as well ...)
>>
>> I don't think so. First of all, the whole thing would be broken then in
>> sw. It is useful to have it in sw, at least for testing reasons.
>> So I would leave the unlikely and add it to the second check as well.
>
> Ok, lets go with that then, thanks!

Side comment:
I dont think this is only useful for h/w offloads;->

cheers,
jamal