linux-kernel - Re: kernel oops and panic in acpi_atomic_read under 2.6.39.3. call trace included

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Date:	Wed, 24 Aug 2011 12:16:15 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	"rick@...roway.com" <rick@...roway.com>
CC:	Don Zickus <dzickus@...hat.com>, "Rafael J. Wysocki" <rjw@...k.pl>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Richard Houghton <rhoughton@...roway.com>,
	ACPI Devel Mailing List <linux-acpi@...r.kernel.org>,
	Len Brown <lenb@...nel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: kernel oops and panic in acpi_atomic_read under 2.6.39.3.   call
 trace included

Hi, Rick,

It appears that panic occurs in acpi_atomic_read.  I think the most 
likely cause is that the acpi_generic_address is not pre-mapped.  Can 
you try the patch attached?

It will print registers mapped and accessed.  To use it, run the 
following command line before workload.

dmesg | grep GHES

Then try to find something like

GHES: gar accessed: x, xxxx

in kernel log when panic occurs.

Best Regards,
Huang Ying

View attachment "dbg_ghes.patch" of type "text/x-patch" (847 bytes)