From mboxrd@z Thu Jan 1 00:00:00 1970 From: Don Dutile 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 16:54:00 -0500 Message-ID: <50CB9FF8.2070502@redhat.com> References: <1355415792.2229.7.camel@ul30vt.home> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Alex Williamson , linux-kernel , linux-pci@vger.kernel.org, kvm To: Jason Gao Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On 12/13/2012 09:01 PM, Jason Gao wrote: > On Fri, Dec 14, 2012 at 12:23 AM, Alex Williamson > 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