Re: unexpected IO-APIC, 2.4.36 SMP, AMD dual core Opteron

[Bill Davidsen <davidsen@tmr.com>]

Tuynman, William (JSC-DT/USA)[USA] wrote:
> Hello,
> 	I have been getting this "An unexpected IO-APIC was found" message. In checking, it occurs on 2.4.34 also.
>
> 	The kernel was compiled for 32 bit execution and is running on an AMD dual core Opteron. The machine is an HP Proliant, DL 585.
>
> I'm attaching, as text, a portion of the messages file which contains all of the boot information.
>
> I would be happy to assist with providing additional information that would be helpful to you.
>
>   
The first question I have is, why are you running a 2.4 kernel on a 
modern CPU? I suspect the SMP logic in 2.4.26 is a decade older than the 
hardware. SMP was pretty unusual then, multi-core was just not an end 
user feature. I don't doubt that the IO-APIC may have unsupported features.

Might I suggest that you boot off a recent "live CD" like Fedora or 
Puppy Linux, just to see if you still see a problem. If not, you will 
have more information to evaluate your next step.


-- 
Bill Davidsen <davidsen@tmr.com>
  "Woe unto the statesman who makes war without a reason that will still
  be valid when the war is over..." Otto von Bismark