netdev - Re: IPv6 FIB related crash with MACVLANs in 3.9.11+ kernel.

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Message-ID: <CAHA+R7O_xghD4a5RD=omhnuMD72pRmKU9VMoxPUVuGcu682jBg@mail.gmail.com>
Date:	Mon, 29 Sep 2014 13:39:37 -0700
From:	Cong Wang <cwang@...pensource.com>
To:	Ben Greear <greearb@...delatech.com>
Cc:	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Hongmei Li <duckcncn@...il.com>,
	netdev <netdev@...r.kernel.org>
Subject: Re: IPv6 FIB related crash with MACVLANs in 3.9.11+ kernel.

On Mon, Sep 29, 2014 at 12:48 PM, Ben Greear <greearb@...delatech.com> wrote:
>
> We are going to be running up to 20 concurrent scripts that
> will be dumping routes & ips, and configuring ip addresses
> and routes during bringup.
>
> I don't have a simple stand-alone way to reproduce this,
> but at least when we reported the problem is was very easy
> for us to reproduce with our tool.
>
> Maybe 20 scripts running in parallel that randomly configured and dumped routes
> and ip addresses on random interfaces would do the trick?
>

I think the most important question is why is this related with macvlan?
IPv6 is L3 while macvlan pure L2, if this is a IPv6 routing bug, it should
not be limited to macvlan.

What does your IPv6 routing table look like? And how do you configure those
macvlan interfaces?
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