netdev - Re: Bug, kernel panic, NULL dereference , cleanup_once / icmp_route_lookup.clone.19.clone / nat , 2.6.39-rc7-git11

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Date:	Wed, 18 May 2011 15:46:07 +0300
From:	Denys Fedoryshchenko <denys@...p.net.lb>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	<netdev@...r.kernel.org>
Subject: Re: Bug, kernel panic, NULL dereference , cleanup_once / icmp_route_lookup.clone.19.clone / nat , 2.6.39-rc7-git11

 On Wed, 18 May 2011 13:44:07 +0200, Eric Dumazet wrote:
> Le mercredi 18 mai 2011 à 12:05 +0200, Eric Dumazet a écrit :
>> Le mercredi 18 mai 2011 à 12:53 +0300, Denys Fedoryshchenko a écrit 
>> :
>>
>> >  Yes, i will try. I should enable SLUB debugging only, or also 
>> anything
>> >  else?
>> >
>> >  But possible it will take time to reproduce bug, seems it is 
>> occuring
>> >  rare. With 2.6.39 release i will rollout update to few hundreds 
>> PPPoE's,
>> >  maybe it will increase chances to get information.
>> >
>>
>> I would try both : slub_debug=ZFP slub_nomerge
>>
>> or maybe only slub_debug=ZFPU
>>
>> Thanks !
>>
>
> Hmm, do you have both ipv6/ipv4 trafic on your machine by any chance 
> ?
 It is NAS, has ipv6 enabled recently (i am preparing for ipv6), but 
 ipv6 is not routed anywhere, maybe just automatically addresses 
 appearing on interfaces, including the one looking to customer subnet. 
 ppp is ipv4 only.

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