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

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Date:	Fri, 2 Sep 2011 19:32:38 -0400
From:	rick@...roway.com
To:	"Huang Ying" <ying.huang@...el.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 Huang,

Sorry for the delay in my response.  Hurricane Irene delayed our testing a
bit.

I had to switch the 5620 CPUS I had for 5670s.  After 4 days of running
(it was usually about 2 before) I finally got this output in dmesg:

[337296.365930] GHES: gar accessed: 0, 0xbf7b9370
[337296.365936] ACPI atomic read mem: addr 0xbf7b9370 mapped to
ffffc90013ee8370

It is not mapped to 0 as expected, but it didn't crash now!

Thanks,
Rick

> On 08/25/2011 11:47 PM, rick@...roway.com wrote:
>> Hi Huang,
>>
>> My new setup reproduced the panic. However I do not have any gar
>> accessed
>> messages on it.  The gar mapped messages are in my previous email.  Here
>> is the latest call trace.  There is no GHES output prior to it:
>>
>
> That is wired.  Can you try the patch attached?  If my guessing is
> correct, there will be no panic, but something as follow will be in dmesg:
>
> ACPI atomic read mem: addr 0xxxxx mapped to 0
>
> Best Regards,
> Huang Ying
>


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