linux-kernel - Re: early exception error

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Message-ID: <20081231202346.GH20882@localhost>
Date:	Wed, 31 Dec 2008 23:23:46 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	david@...g.hm
Cc:	Andi Kleen <andi@...stfloor.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: early exception error

[david@...g.hm - Wed, Dec 31, 2008 at 01:18:25PM -0800]
> 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
>

Thanks David, if I recognize correctly now it fails at
vfs_caches_init. hmm...

		- Cyrill -
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