From: Myron Stowe <mstowe@redhat.com>
To: "Huang, Ying" <ying.huang@intel.com>
Cc: linux-acpi <linux-acpi@vger.kernel.org>
Subject: RE: kernel oops and panic in acpi_atomic_read under 2.6.32
Date: Mon, 05 Mar 2012 21:06:07 -0700 [thread overview]
Message-ID: <1331006767.2411.69.camel@zim.stowe> (raw)
In-Reply-To: <CA2E3DE2DD06CA4FA11644750E4E292F0FE45B43@SHSMSX102.ccr.corp.intel.com>
On Tue, 2012-03-06 at 01:53 +0000, Huang, Ying wrote:
> Hi, Myron,
>
> Thanks for your work and analysis.
>
> > This leads me to believe that the mapping for the error status register,
> > which is put in place by ghes_new(), is silently failing. The other
> > possibility is that the mapping was un-mapped at some point.
>
> > My current guess is that the mapping is failing due to the GAR in
> > question residing within ACPI's NVS.
>
> The ACPI's NVS works for ioremap when used by ACPI itself.
Could you elaborate a little more. I'm guessing by "works when used by
ACPI itself" you mean when not used in conjunction with error injection?
> So I guess it may be unmapped some place. One way to check that is
> to print out current mappings when we do mapping and unmapping in
> atomicio.c. But now I am in travelling, so I can only write the debug
> patch after returning to office in about 1 week. Do you have time to
> do that?
No problem, I can handle that. Hope you trip goes well.
Thanks,
Myron
>
> Best Regards,
> Huang Ying
>
prev parent reply other threads:[~2012-03-06 4:06 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-06 0:19 kernel oops and panic in acpi_atomic_read under 2.6.32 Myron Stowe
2012-03-06 1:53 ` Huang, Ying
2012-03-06 4:06 ` Myron Stowe [this message]
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