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

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Date:	Fri, 05 Sep 2008 21:25:38 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Luca Tettamanti <kronos.it@...il.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...hat.com,
	"H. Peter Anvin" <hpa@...nel.org>
Subject: Re: [2.6.27] overlapping early reservations [was: early exception
 - lockdep related?]

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..

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