Messages in this thread | | | Date | Fri, 14 Dec 2012 16:54:00 -0500 | From | Don Dutile <> | Subject | Re: DMAR and DRHD errors[DMAR:[fault reason 06] PTE Read access is not set] Vt-d & intel_iommu |
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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 > well, if you don't enable the IOMMU, then it won't have IOMMU faults! ;-)
> 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 > mptsas or smi fw has to be different....
> Anyone have any idea for this ? > > thanks > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
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