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

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Message-ID: <5429A886.1040809@candelatech.com>
Date:	Mon, 29 Sep 2014 11:44:22 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	Hongmei Li <duckcncn@...il.com>
CC:	netdev@...r.kernel.org
Subject: Re: IPv6 FIB related crash with MACVLANs in 3.9.11+ kernel.

On 09/29/2014 11:15 AM, Hongmei Li wrote:
> Thanks Hannes for your prompt response!
> 
> We just encountered this issue two times in our product stability test so far,
> and my panic backtrace is the exactly same with the one reported here.
> I don't know how to reproduce the issue till now. 
> I tried several method, unfortunately, I can not reproduce it by myself. :(

We could reproduce it easily using our user-space tool that creates 1000
mac-vlans, configures them, dumps routing tables, etc.  But, we could
only reproduce it when we had the ixgbe ports unplugged.  If they
were properly connected to a switch, we did not see any crashes.

My original email on 2/3/2014 has more details, and the thread that
follows has some info on debugging we did at the time.

We will be happy to test patches...

Thanks,
Ben

-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com

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