Re: early exception error

Cyrill Gorcunov
2009-01-02T17:42:04Z

[david@lang.hm - Fri, Jan 02, 2009 at 10:21:52AM -0800]
> 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
>

Thanks, David! Trying to understand what is going on :)

Here is a new picture if someone would like to jump into
the bug handling

http://linux.lang.hm/linux/IMG00033.jpg

- Cyrill -