linux-kernel - Re: Oops in VMA code

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Message-ID: <1308205011.2516.66.camel@pasglop>
Date:	Thu, 16 Jun 2011 16:16:51 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Alexander Graf <agraf@...e.de>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>, linux-mm@...ck.org,
	"linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>
Subject: Re: Oops in VMA code

On Thu, 2011-06-16 at 16:02 +1000, Benjamin Herrenschmidt wrote:
> On Thu, 2011-06-16 at 07:32 +0200, Alexander Graf wrote:
> > On 16.06.2011, at 06:32, Linus Torvalds wrote:
> 
> > Thanks a lot for looking at it either way :).
> 
> Yeah thanks ;-) Let me see what I can dig out.
> 
> First it's a load from what looks like a valid pointer to the linear
> mapping that had one byte corrupted (or more but it looks reasonably
> "clean"). It's not a one bit error, there's at least 2 bad bits (the
> 09):
> 
> DAR: c00090026236bbc0
> 
> Alex, how much RAM do you have ? If that was just a one byte corruption,
> the above would imply you have something valid between 9 and 10G. From
> the look of other registers, it seems that it could be a genuine pointer
> with just that stay "09" byte that landed onto it.

90 actually...

Anyways, doesn't tell us much more.

Ben.


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