linux-kernel - Re: Reading a bad sector does not report failure as 'read error' but hangs PC with 'Machine Check Exception'

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Message-id: <46B0559A.5050708@shaw.ca>
Date:	Wed, 01 Aug 2007 03:42:50 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	"Hendrik ." <chasake@...oo.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Reading a bad sector does not report failure as 'read error' but
 hangs PC with 'Machine Check Exception'

Hendrik . wrote:
> Ok, I did actually not copy the coreret code in the
> mcelog, leaving me some errors about the Northbridge.
> If I do it again it gives me something else. I made 2
> digital photo's of 2 lockups when it happened and this
> is the result of the tool, the TSC is different in
> both errors, the rest is the same:
> 
> --------------------
> CPU 0 4 northbridge TSC b7d4a144d0 
>   Northbridge Watchdog error
>        bit57 = processor context corrupt
>        bit61 = error uncorrected
>   bus error 'generic participation, request timed out
>       generic error mem transaction
>       generic access, level generic'
> STATUS b200000000070f0f MCGSTATUS 4
> This is not a software problem!

Presumably some access that the CPU is doing to the controller has timed 
out and caused the MCE. It might be useful if we could get a stack trace 
from where the MCE was triggered - does anyone know if it's possible to 
do this?

It's possible that only NVidia really could tell why this error would 
result from a disk problem, though.

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@...pamshaw.ca
Home Page: http://www.roberthancock.com/

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