netdev - Re: [RFC Patch net-next 5/6] net_sched: use rcu in fast path

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Message-ID: <57D2D470.2050806@gmail.com>
Date:   Fri, 9 Sep 2016 08:25:36 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Jamal Hadi Salim <jhs@...atatu.com>
Subject: Re: [RFC Patch net-next 5/6] net_sched: use rcu in fast path

On 16-09-08 10:54 PM, Cong Wang wrote:
> On Thu, Sep 8, 2016 at 8:49 AM, John Fastabend <john.fastabend@...il.com> wrote:
>> Agreed not sure why you would ever want to do a late binding and
>> replace on a tc_mirred actions. But it is supported...
> 
> I will let Jamal teach you on this, /me is really tired of explaining
> things to you John.
> 

This was a meta-comment on the use case for doing this with mirred
action. Not necessarily about the patch itself.

I was actually curious where this happens in practice. The only thing
I can think of is your external logging box moved so you need to send
out another port. Is there any open source software that manages 'tc'
like this. If so I would like to read it.

So do you know of any?

.John