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Date: Thu, 18 Mar 2010 15:04:06 +0100
From: Giulio Ferro <auryn@zirakzigil.org>
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To: Max Laier <max@love2party.net>
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Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>,
	Greg Hennessy <Greg.Hennessy@nviz.net>, freebsd-pf@freebsd.org
Subject: Re: PF + BRIDGE + PFSYNC causes system freezing
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On 17.03.2010 18:00, Max Laier wrote:
> Can you enable WITNESS and compile in DDB. Make sure to report any LORs
>>> and once the system freezes try to enter the debugger and get ps and
>>> locks information.
>>>
>>> show allchains
>>> show alllocks
>>> ps
>>>
>>> After that you can try to "call doadump" so you get the information in
>>> the coredump and don't have to transcribe it manually.
>>>
>>> Thanks,
>>>     Max
>>>        
>> Sorry, I'm not really an expert of this, but how can I enter the debugger
>> if the system has frozen?
>>      
> Ctrl+Alt+ESC (in default configuration).
> _______________________________________________
>    


I've added this  to the kernel

option          KDB
option          WITNESS
option          WITNESS_KDB
option          DDB


Now it can't even boot properly. It stops when it tries to configure 
networking:
uma_zalloc_arg: zone "256" with the following non-sleepable locks held:
exclusive rw ifnet_rw (ifnet_rw) r = 0 (0xffffffff80e31b20) locked @ 
/usr/src/sys/net/if.c:414

show allchains
<no result>

show alllocks
exclusive rw ifnet_rw (ifnet_rw) r = 0 (0xffffffff80e31b20) locked @ 
/usr/src/sys/net/if.c:414
exclusive sx ifnet_sx (ifnet_sx) r = 0 (0xffffffff80e31b40) locked @ 
/usr/src/sys/net/if.c:414

ps
<returns a lot of stuff. tell me to search something in particular>

call doadump
Cannot dump. Device not defined or unavailable

Hope it helps...