linux-kernel - Re: [2.6.27] overlapping early reservations [was: early exception

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Message-ID: <48C19415.9060108@kernel.org>
Date:	Fri, 05 Sep 2008 13:18:29 -0700
From:	"H. Peter Anvin" <hpa@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Luca Tettamanti <kronos.it@...il.com>,
	linux-kernel@...r.kernel.org, mingo@...hat.com
Subject: Re: [2.6.27] overlapping early reservations [was: early exception
 - lockdep related?]

Peter Zijlstra wrote:
> On Fri, 2008-09-05 at 21:17 +0200, Luca Tettamanti wrote:
>> On Thu, Sep 4, 2008 at 10:51 PM, Luca Tettamanti <kronos.it@...il.com> wrote:
>>> On Thu, Sep 4, 2008 at 4:25 PM, Peter Zijlstra <peterz@...radead.org> wrote:
>>>> Sadly your config just boots, albeit not to userspace due to missing
>>>> drivers.
>>> Yes, I managed to boot it with qemu... I tried kgdb - without luck -
>>> kernel dies too early.
>>> I also managed to get a stack trace :D
>>>
>>> http://img151.imageshack.us/my.php?image=tracedm1.jpg
>>>
>>> It seems that lockdep is an innocent bystander... the kernel died with
>>> panic() in __reserve_early, and then took another exception while
>>> printing the panic (I guess).
>>> Will add further debug stuff to see wtf is going on.
>> Hum, kernel says:
>>
>> http://img177.imageshack.us/my.php?image=overlappingus2.jpg
>>
>> Overlapping early reservations b98000-eff266 RAMDISK to 200000-d09cf7
>> TEXT DATA BSS
>>
>> It would appear that the initramfs is overlapping the kernel itself,
>> is the boot loader (LILO) doing something stupid?
> 
> Suppose it is, lets ask hpa..
> 

It definitely looks like it.

	-hpa
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