linux-kernel - Re: Cannot boot any HIGHMEM kernel (kernel panic

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Message-ID: <87od7h9g1s.fsf@basil.nowhere.org>
Date:	Thu, 08 May 2008 13:43:59 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Michael Elsdörfer <michael@...doerfer.info>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Cannot boot any HIGHMEM kernel (kernel panic - not syncing)

Michael Elsdörfer <michael@...doerfer.info> writes:
>
> Now, Machine Check Exception seems to point towards a hardware error,

It not only seems to, it does.

> but not only does the 486 kernel appear to work flawlessly, the server
> was perfectly happy running a self-compiled sarge kernel (with HIGHMEM)
> just a couple of days ago.

The non highmem kernel will simply not use most of your memory, so if 
the machine check happens accessing memory you will not see it.

-Andi
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