linux-kernel - Re: APEI: Can not request iomem region for GARs

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Message-ID: <4E642E76.4010309@intel.com>
Date:	Mon, 05 Sep 2011 10:05:42 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Pavel Ivanov <paivanof@...il.com>
CC:	Bjorn Helgaas <bhelgaas@...gle.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: APEI: Can not request iomem region for GARs

On 09/03/2011 10:44 AM, Pavel Ivanov wrote:
> On Mon, Aug 29, 2011 at 1:37 AM, Huang Ying <ying.huang@...el.com> wrote:
>> On 08/27/2011 11:28 AM, Pavel Ivanov wrote:
>>> Also I noticed there's another suspicious message in dmesg and it was
>>> there earlier too (although it's not shown on console):
>>>
>>> GHES: Failed to enable APEI firmware first mode
>>>
>>> Is it bad? What does it mean?
>>
>> Maybe this has been fixed, please this patch,
>>
>> https://lkml.org/lkml/2011/8/11/297
> 
> Yes, this patch indeed fixed this failure message. It's now replaced by
> 
> GHES: APEI firmware first mode is enabled by WHEA _OSC.
> 
> Can I ask you another question: what does the following message mean?
> 
> [Firmware Warn]: GHES: Poll interval is 0 for generic hardware error
> source: 1, disabled.

This means:

The generic hardware error source with ID 1 is notified by poll, that
is, Linux should poll the specified address to check whether there is
hardware error report from hardware.  But the poll interval specified by
firmware is "0".  I think this should be a firmware error, and disabled
it.  I think maybe you can contact firmware vendor to fix this.

Best Regards,
Huang Ying
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