From: Don Dutile <ddutile@redhat.com>
To: Jason Gao <pkill.2012@gmail.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-pci@vger.kernel.org, kvm <kvm@vger.kernel.org>
Subject: Re: DMAR and DRHD errors[DMAR:[fault reason 06] PTE Read access is not set] Vt-d & intel_iommu
Date: Fri, 14 Dec 2012 16:55:09 -0500 [thread overview]
Message-ID: <50CBA03D.8050409@redhat.com> (raw)
In-Reply-To: <CANmqhJBAxzVa5Ds0gojnYDDku5UbXGwfCNC=+z3XmVonF-_j2w@mail.gmail.com>
On 12/13/2012 09:01 PM, Jason Gao wrote:
> On Fri, Dec 14, 2012 at 12:23 AM, Alex Williamson
> <alex.williamson@redhat.com> wrote:
>>
>> Device 03:00.0 is your raid controller:
>>
>> 03:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 1078 (rev 04)
>>
>> For some reason it's trying to read from ffe65000, ffe8a000, ffe89000,
>> ffe86000, ffe87000, ffe84000. Those are in reserved memory regions, so
>> it's not reading an OS allocated buffer, which probably means it's some
>> kind of side-band communication with a management controller. I'd guess
>> it's a BIOS bug and there should be an RMRR covering those accesses.
>> Thanks,
>
> First of all ,I want to known whether I can ignore these errors on the
> production server,and do these error may affect the system?
>
> By the way,when I removed the "intel_iommu=on" from /etc/grub.conf,no
> DMAR related errors occur
>
> It's a strange thing,other three Dell R710 servers with the same bios
> version v. 6.3.0, same kernel 2.6.32-279.14.1 on RHEL6u3(Centos 6u3)
> ,but these errors don't appear on these tree servers
>
forgot: did you check that all the bios settings are the same btwn
the 710 systems?
> Anyone have any idea for this ?
>
> thanks
> --
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next prev parent reply other threads:[~2012-12-14 21:55 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-13 9:50 DMAR and DRHD errors[DMAR:[fault reason 06] PTE Read access is not set] Vt-d & intel_iommu Jason Gao
2012-12-13 16:23 ` Alex Williamson
2012-12-14 2:01 ` Jason Gao
2012-12-14 4:45 ` Alex Williamson
2012-12-14 6:56 ` Jason Gao
2012-12-14 7:00 ` Jason Gao
2012-12-14 21:54 ` Don Dutile
2012-12-15 8:18 ` Jason Gao
2012-12-14 21:55 ` Don Dutile [this message]
2012-12-15 8:25 ` Jason Gao
2012-12-14 21:32 ` Don Dutile
2012-12-15 22:16 ` Robert Hancock
2012-12-17 16:27 ` Don Dutile
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