Re: early exception error

david
2009-01-02T17:19:53Z

On Wed, 31 Dec 2008, david@lang.hm wrote:

> On Thu, 1 Jan 2009, Andi Kleen wrote:
>
>> On Wed, Dec 31, 2008 at 12:59:08PM -0800, david@lang.hm wrote:
>>> On Wed, 31 Dec 2008, Andi Kleen wrote:
>>>
>>>>> on the picture you sent me i noticed the message
>>>>> "Your memory is not aligned you need to rebuild your
>>>>> kernel with bigger NODEMAP SIZE shift=20" and then
>>>>> srat code complains about "No NUMA code hash function found"
>>>>> which looks a bit scary. Btw, could you post this picture
>>>>> on some public resource so NUMA people could check it?
>>>>
>>>> This case used to be handled cleanly (NUMA disabled), but perhaps
>>>> that has regressed. But still it sounds like something is going wrong,
>>>> unless his machine really has a very weird memory map.
>>>
>>> it shouldn't, it was one of the high-volume servers 4-5 years ago and only
>>> has 4G of ram in it
>>
>> From looking at the screenshot Cyrill sent you seem to have a funny
>> SRAT with overlapping areas that is rejected in the end. I suspect the
>> fallback code doesn't handle this properly.
>>
>> Does it work when you boot with numa=noacpi ?
>
> it gets past the point where the bootmemory_debug messages flow by, but I get
> another oops (snapshot of the screen is at
> http://linux.lang.hm/linux/IMG00031.jpg )

oops, I misread your mail, IMG00031.jpg was with numa=off

I just posted IMG00033.jpg which is with numa=noacpi and earlyprintk=vga
but not bootmem_debug

David Lang