CPU too old panic on Centrino proc - 2.6.22.6

CPU too old panic on Centrino proc - 2.6.22.6

[Robby Workman]

Please CC any replies; not subscribed to list

I found this thread: http://lkml.org/lkml/2007/5/16/499
but it doesn't seem to apply here (bear in mind that I'm probably
not qualified to determine that though :))

On booting a 2.6.22.6 kernel with SMP support, I get a panic
immediately:
  PANIC: CPU too old for this kernel
This panic does not occur on a non-SMP kernel having almost
identical configuration.

This is on a Thinkpad T41:
  /proc/cpuinfo --> http://rlworkman.net/cpuinfo
  dmesg --> http://rlworkman.net/dmesg
  kernel config --> http://rlworkman.net/config-2.6.22.6

The 2.6.21.5 SMP kernels from Slackware 12.0 all boot properly, and
the config for this 2.6.22.6 SMP kernel is based on the one from 12.0.

I'm basically reaching for clues at this point -- is this a PEBKAC on
my part?  What other information would be useful?

(Please CC me on replies)

Thanks,
-RW

Re: CPU too old panic on Centrino proc - 2.6.22.6

[Andi Kleen]

Robby Workman <rw@rlworkman.net> writes:

> On booting a 2.6.22.6 kernel with SMP support, I get a panic
> immediately:
>   PANIC: CPU too old for this kernel
> This panic does not occur on a non-SMP kernel having almost
> identical configuration.
> 
> This is on a Thinkpad T41:
>   /proc/cpuinfo --> http://rlworkman.net/cpuinfo
>   dmesg --> http://rlworkman.net/dmesg
>   kernel config --> http://rlworkman.net/config-2.6.22.6
> 
> The 2.6.21.5 SMP kernels from Slackware 12.0 all boot properly, and
> the config for this 2.6.22.6 SMP kernel is based on the one from 12.0.
> 
> I'm basically reaching for clues at this point -- is this a PEBKAC on
> my part?  What other information would be useful?

Most likely you enabled CONFIG_HIGHMEM64G. Banias didn't support 
PAE.

-Andi

Re: [SOLVED] CPU too old panic on Centrino proc - 2.6.22.6

[Robby Workman]

Andi Kleen wrote:
> Robby Workman <rw@rlworkman.net> writes:
> 
>> On booting a 2.6.22.6 kernel with SMP support, I get a panic
>> immediately:
>>   PANIC: CPU too old for this kernel
>> This panic does not occur on a non-SMP kernel having almost
>> identical configuration.
>>
>> This is on a Thinkpad T41:
>>   /proc/cpuinfo --> http://rlworkman.net/cpuinfo
>>   dmesg --> http://rlworkman.net/dmesg
>>   kernel config --> http://rlworkman.net/config-2.6.22.6
>>
>> The 2.6.21.5 SMP kernels from Slackware 12.0 all boot properly, and
>> the config for this 2.6.22.6 SMP kernel is based on the one from 12.0.
>>
>> I'm basically reaching for clues at this point -- is this a PEBKAC on
>> my part?  What other information would be useful?
> 
> Most likely you enabled CONFIG_HIGHMEM64G. Banias didn't support 
> PAE.


Thanks, Andi - that was indeed the problem.  Of course, things like
this are never solved until asked about on a mailing list :)

HIGHMEM4G rather than HIGHMEM64G (not sure why I had that marked),
no PAE, and I was using the 64-bit memory/IO (EXPERIMENTAL).  Now it's
off.  A side effect was CONFIG_X86_CMPXCHG64 disappearing from the
.config, which I thought might have also been part of the problem
based on that other thread.

Either way, thanks for the response!

-RW