GART Error 11

[Arthur Perry]

Hi Saurabh,

I am working on this issue as we speak.
It is interesting that your machine crashes entirely with iommu disabled.

I am starting to think there is more to this than just the kernel
misreporting other hardware errors (being improperly decoded as GART
errors).
On my machine, I am actaully getting Gart erros on 3 out of 4 CPUS when I
use RedHat's 2.4.21-9EL kernel. This same kernel when rebuilt from source,
however, will not produce GART errors when built without AGP support.

Here is my Extended error code (bits 19-16 on 0:[18,19,1b]:3 at offset 0x44:
0101 = GART error

So, this is not a translation issue on my side.

Can you do this for me?

pcitweak -r 0:18:3 0x44
and
pcitweak -r 0:19:3 0x44


Thanks!


Arthur Perry
Lead Linux Developer / Linux Systems Architect
Validation, CSU Celestica
Sair/Linux Gnu Certified Professional
Providing professional Linux solutions for 7+ years

On Tue, 1 Jun 2004, Saurabh Barve wrote:

> Hi,
>
> I know this has been posted before on this list, but the solution
> suggested does not seem to work for me.
>
> I have a dual opteron system with 8 GB of RAM. I am running RHEL 3.0 AS on
> it. The kernel version is 2.4.21-4.ELsmp. The motherboard I am using is
> the Tyan Thunder K8S Pro - 2882 motherboard.
>
> I am getting the following error every two minutes or so:
>
> GART error 11
> Lost an northbridge error
> NB error address some-hex-number
> Error uncorrected
>
> I checked the various postings on the list, and someone suggested that
> passing iommu=off option to the kernel solved the problem for him.
> However, when I tried that, it got the kernel to panic. I read somewhere
> that a newer kernel would fix these 'bugs' in the default RHEL kernel.
> However, I am using the onboard SATA controller for my hard disks. This
> requires binary drivers from Tyan. I already downloaded a newer kernel,
> however, it breaks the drivers, so I can't boot into the new kernel.
>
> Here is my output from lspci:
>
> 00:06.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8111 PCI (rev 07)
> 00:07.0 ISA bridge: Advanced Micro Devices [AMD] AMD-8111 LPC (rev 05)
> 00:07.1 IDE interface: Advanced Micro Devices [AMD] AMD-8111 IDE (rev 03)
> 00:07.2 SMBus: Advanced Micro Devices [AMD] AMD-8111 SMBus 2.0 (rev 02)
> 00:07.3 Bridge: Advanced Micro Devices [AMD] AMD-8111 ACPI (rev 05)
> 00:0a.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8131 PCI-X Bridge
> (rev 12)
> 00:0a.1 PIC: Advanced Micro Devices [AMD] AMD-8131 PCI-X APIC (rev 01)
> 00:0b.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8131 PCI-X Bridge
> (rev 12)
> 00:0b.1 PIC: Advanced Micro Devices [AMD] AMD-8131 PCI-X APIC (rev 01)
> 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
> 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
> 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
> 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
> 00:19.0 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
> 00:19.1 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
> 00:19.2 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
> 00:19.3 Host bridge: Advanced Micro Devices [AMD] K8 NorthBridge
> 02:09.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5704
> Gigabit Ethernet (rev 03)
> 02:09.1 Ethernet controller: Broadcom Corporation NetXtreme BCM5704
> Gigabit Ethernet (rev 03)
> 03:00.0 USB Controller: Advanced Micro Devices [AMD] AMD-8111 USB (rev 0b)
> 03:00.1 USB Controller: Advanced Micro Devices [AMD] AMD-8111 USB (rev 0b)
> 03:05.0 Unknown mass storage controller: Silicon Image, Inc. (formerly CMD
> Technology Inc) Silicon Image SiI 3114 SATARaid Controller (rev 02)
> 03:06.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27)
> 03:08.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev
> 10)
>
> The dmesg output was too large to include inline, so I am attaching it as
> a text file.
>
> I tried passing the following options to the kernel:
>
> iommu=noagp
> iommu=noforce
> iommu=off (results in kernel-panic)
> mce=off
> mce=0
>
> I tried all the above in various combinations, but none of them worked.
> The machine doesn't crash, and everything else seems to work fine, but I'd
> like to get rid of these errors.
>
> There are some snippets from the dmesg output that I found to be of
> interest:
>
> ------------------------------------------------------------
> Linux agpgart interface v0.99 (c) Jeff Hartmann
> agpgart: Maximum main memory to use for agp memory: 7956M
> agpgart: no supported devices found.
> PCI-DMA: Disabling AGP.
> PCI-DMA: aperture base @ 10000000 size 65536 KB
> PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture
> -----------------------------------------------------------
>
> -----------------------------------------------------------
>
> GART error 11
> Lost an northbridge error
> NB error address 00000000fbfe4398
> Error uncorrected
> Northbridge status a40000000005001b
>
> ----------------------------------------------------------
>
>
> Any suggestions?
>
> Thanks,
> Saurabh.
>