linux-kernel - Re: early exception error

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Date:	Wed, 31 Dec 2008 13:18:25 -0800 (PST)
From:	david@...g.hm
To:	Cyrill Gorcunov <gorcunov@...il.com>
cc:	Andi Kleen <andi@...stfloor.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: early exception error

On Wed, 31 Dec 2008, Cyrill Gorcunov wrote:

> [david@...g.hm - Wed, Dec 31, 2008 at 12:07:33PM -0800]
>> On Wed, 31 Dec 2008, Cyrill Gorcunov wrote:
>>
>>> [david@...g.hm - Wed, Dec 31, 2008 at 11:12:12AM -0800]
>>>> On Wed, 31 Dec 2008, Cyrill Gorcunov wrote:
>>>>
>>>>> [david@...g.hm - Tue, Dec 30, 2008 at 05:39:29PM -0800]
>>>>>>
>>>>>> so it looks like this is in alloc_bootmem_core in both cases.
>>>>>>
>>>>>> David Lang
>>>>>>
>>>>>
>>>>> Along with Andi's proposed earlyprintk=vga I think
>>>>> bootmem_debug option could be usefull here too.
>>>>
>>>> adding bootmem_debug creates so much additonal output that the oops
>>>> scrolls off the screen (except the last 'paragraph' of it)
>>>>
>>>> it looks like it's individual items being allocated (trying to scan it as
>>>> it scrolled by)
>>>
>>> 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?
>>
>> http://linux.lang.hm/linux/IMG00030.jpg
>>
>> I'll try rebuilding with a bigger nodemap size and let you know
>>
>> David Lang
>>
>
> also you could just pass numa=off and check if it help.
> (even if it help it would not mean that problem are gone
> but become hidden)

with numa=off the system looks like it gets a bit further

http://linux.lang.hm/linux/IMG00031.jpg

this is with framebuffer disabled, earlyprintk=vga bootmem_debug numa=off

David Lang
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