linux-kernel - Re: Rootfs in eMMC: Kernel panic ...Attempted to kill init!

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Message-ID: <20090622154308.GC29188@n2100.arm.linux.org.uk>
Date:	Mon, 22 Jun 2009 16:43:08 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Sudeep K N <sudeepholla.maillist@...il.com>
Cc:	linux-arm-kernel@...ts.arm.linux.org.uk, drzeus-mmc@...eus.cx,
	linux-kernel@...r.kernel.org
Subject: Re: Rootfs in eMMC: Kernel panic ...Attempted to kill init!

On Mon, Jun 22, 2009 at 07:43:40PM +0530, Sudeep K N wrote:
> Hi Russell,
> 
> Thanks for the suggestion.
> With the logs it is clear that crash is in the userspace.
> I am getting one of the 2 logs(below) randomly.
> >From trial#2,
> pgd = c60bc000
> [00000000] *pgd=061ee031, *pte=00000000, *ppte=00000000
> I could understand that the page tables are not proper.
> I am not able understand how to proceed.
> 
> Trial#1:
> VFS: Mounted root (ext2 filesystem).
> Freeing init memory: 108K
> linuxrc (1): undefined instruction: pc=40008100
> Code: e08e3003 eb002842 e2801008 e58c217c (e0812103)

Your processor is misbehaving; none of the above hex codes are undefined
instructions, so you shouldn't be taking an undefined instruction trap.

That, coupled with the random nature of these crashes leads me to believe
that it's a case of noisy power supply to the SoC.  Suggest you get your
hardware people to check your board.
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