From: Andi Kleen <andi@firstfloor.org>
To: "Michael Elsdörfer" <michael@elsdoerfer.info>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Cannot boot any HIGHMEM kernel (kernel panic - not syncing)
Date: Thu, 08 May 2008 21:41:35 +0200 [thread overview]
Message-ID: <4823576F.5090607@firstfloor.org> (raw)
In-Reply-To: <4822EAC2.5010502@elsdoerfer.info>
Michael Elsdörfer wrote:
>>> Now, Machine Check Exception seems to point towards a hardware error,
>>
>> It not only seems to, it does.
>> 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.
>
> Thanks Andi.
>
> So the problem would be defective RAM in the machine?
>
> I'm still wondering though while the previous kernel (a self-compiled
> 2.6.17.11) worked then. Laxer checks?
Memory access patterns change between kernels. Likely if you had filled
your memory with some program you would have seen it too.
I always use ftp://ftp.firstfloor.org/pub/ak/memeat.c for testing for
such problems. It simply allocates all free memory and reads and writes
it in a loop.
-Andi
prev parent reply other threads:[~2008-05-08 19:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-08 11:03 Cannot boot any HIGHMEM kernel (kernel panic - not syncing) Michael Elsdörfer
2008-05-08 11:43 ` Andi Kleen
2008-05-08 11:57 ` Michael Elsdörfer
2008-05-08 18:31 ` Dan Noe
2008-05-08 19:41 ` Andi Kleen [this message]
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