linux-kernel - Re: unable to handle kernel paging request at 40000000 __alloc_memory_core

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Message-ID: <4C37841F.4030500@kernel.org>
Date:	Fri, 09 Jul 2010 13:18:39 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Conny Seidel <conny.seidel@....com>
CC:	"Petkov, Borislav" <Borislav.Petkov@....com>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: unable to handle kernel paging request at 40000000 __alloc_memory_core_early+0x147/0x1d6

On 07/09/2010 12:52 PM, Conny Seidel wrote:
> Hi,
> 
> On Fri, 9 Jul 2010 15:08:52 -0400
> Yinghai Lu <yinghai@...nel.org> wrote:
> 
>> On 07/09/2010 07:54 AM, Borislav Petkov wrote:
>>> Hi,
>>>
>>> this is something we're getting during testing on one of our boxes
>>> here, a dual socket Magny-Cours machine. It is oopsing on the addr
>>> variable in __alloc_memory_core_early() after converting it to a
>>> virtual address in order to clear the mem region at it. I've removed
>>> the "#if 0.. #endif" around the printk which dumps the ranges in the
>>> early node map for more info.
>>>
>>> It's latest -git, 32bit build, config is attached.
>>>
>>
>> can not duplicate on all my setup.
>>
>> but look at the code there is limit problem with 32 bit...
>>
>> please check if it will fix the problem.
>>
>> and we will need to rebase early_res to memblock patchset.
>>
>> Thanks
>>
>> Yinghai Lu
>>
> 
> I'm sorry but the patch isn't working.
> 
> Now we are seeing this:
> 
> [    0.000000] BUG: Int 6: CR2 (null)
> [    0.000000]      EDI 00000005  ESI f3e00800  EBP c21afed4  ESP c21afe90
> [    0.000000]      EBX 01000000  EDX 00000006  ECX (null)  EAX fffffff4
> [    0.000000]      err (null)  EIP c2359558   CS 00000060  flg 00010046
> [    0.000000] Stack: fffffff4 (null) 00000001 f3e00000 00000005 00080000 00000001 00000002
> [    0.000000]        000b6800 00000002 f3e00000 00000001 00000002 c21aff0c c2359dd2 (null)
> [    0.000000]        ffe00000 00000004 (null) 00000004 001fafd8 c2943000 (null) 00004e00
> [    0.000000] Pid: 0, comm: swapper Not tainted 2.6.35-rc4+ #1
> [    0.000000] Call Trace:
> [    0.000000]  [<c1dd39d9>] hlt_loop+0x0/0x3
> [    0.000000]  [<c2359558>] ? free_area_init_node+0x5b1/0x647
> [    0.000000]  [<c2359dd2>] free_area_init_nodes+0x7b5/0x89a
> [    0.000000]  [<c234a2c9>] paging_init+0x1a9/0x1cc
> [    0.000000]  [<c2330325>] setup_arch+0x1414/0x15f7
> [    0.000000]  [<c23510c1>] ? __reserve_early+0x119/0x135
> [    0.000000]  [<c1078c8a>] ? printk+0x36/0x54
> [    0.000000]  [<c232917b>] start_kernel+0x1d0/0xb6f
> [    0.000000]  [<c2328163>] i386_start_kernel+0x163/0x179

can you send out boot log from start?

YH
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