Re: netbsd-5.1_RC3 crash at Dell M710

[Jean-Yves Migeon <jeanyves.migeon%free.fr@localhost>]

On 14.08.2010 00:05, 6bone%6bone.informatik.uni-leipzig.de@localhost wrote:
> On Fri, 13 Aug 2010, Jean-Yves Migeon wrote:
> 
>> Date: Fri, 13 Aug 2010 17:03:14 +0200
>> From: Jean-Yves Migeon <jeanyves.migeon%free.fr@localhost>
>> To: 6bone%6bone.informatik.uni-leipzig.de@localhost
>> Cc: tech-kern%netbsd.org@localhost
>> Subject: Re: netbsd-5.1_RC3 crash at Dell M710
>>
>> On 13.08.2010 08:52, 6bone%6bone.informatik.uni-leipzig.de@localhost wrote:
>>> hello,
>>>
>>> netbsd crashs at Dell M710. You can have a look at the screeshot at
>>> http://6bone.informatik.uni-leipzig.de/Dell-M710.bmp
>>>
>>> Any Ideas what could be the problem?
>>
>> Most probably, an attempt to read a MSR, which is not allowed/present
>> for that CPU.
>>
>> At ddb prompt, type "bt" and "show reg", so we can see where and how it
>> happens.
>>
> 
> http://6bone.informatik.uni-leipzig.de/Dell-M710-bt.bmp
> http://6bone.informatik.uni-leipzig.de/Dell-M710-show-reg-1.bmp
> http://6bone.informatik.uni-leipzig.de/Dell-M710-show-reg-2.bmp

MSR 0xcd, which is MSR_FSB_FREQ.

One hacky fix is needed. You seem to be in the same situation as mine
there, quick glance at your CPU ID makes me think it reports model 0xc too:

http://cvsweb.netbsd.org/cgi-bin/cvsweb.cgi/src/sys/arch/x86/x86/intel_busclock.c?rev=1.11&content-type=text/x-cvsweb-markup

I asked for a pull-up about a week ago, so should come in eventually.
Try patching around as I did.

Cheers,

-- 
Jean-Yves Migeon
jeanyves.migeon%free.fr@localhost