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Solved DMAR: [DMA Write] Request device [04:00.1] fault addr 791e2000 [fault reason 05] PTE Write access is not set

Solved issue

soolan

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Hello

there is such an error on my server. How can I find out what is causing the problem?

On the internet it is recommended to emove the intel_iommu=on from the Linux kernel boot parameters.

Code:
Nov 21 08:40:28 soolean kernel: DMAR: DRHD: handling fault status reg 502
Nov 21 08:40:28 soolean kernel: DMAR: [DMA Write] Request device [04:00.1] fault addr 791e2000 [fault reason 05] PTE Write access is not set
Nov 21 08:40:28 soolean kernel: DMAR: [DMA Write] Request device [04:00.1] fault addr 791e2000 [fault reason 05] PTE Write access is not set
Nov 21 08:40:28 soolean kernel: DMAR: [DMA Write] Request device [04:00.1] fault addr 791e2000 [fault reason 05] PTE Write access is not set
Nov 21 08:40:28 soolean kernel: DMAR: [DMA Write] Request device [04:00.1] fault addr 791e2000 [fault reason 05] PTE Write access is not set
Nov 21 08:40:28 soolean kernel: DMAR: DRHD: handling fault status reg 102
Nov 21 08:40:28 soolean kernel: DMAR: [DMA Write] Request device [04:00.1] fault addr 791e2000 [fault reason 05] PTE Write access is not set
Nov 21 08:40:28 soolean kernel: DMAR: [DMA Write] Request device [04:00.1] fault addr 791e2000 [fault reason 05] PTE Write access is not set
Nov 21 08:40:28 soolean kernel: DMAR: [DMA Write] Request device [04:00.1] fault addr 791e2000 [fault reason 05] PTE Write access is not set
Nov 21 08:40:28 soolean kernel: DMAR: DRHD: handling fault status reg 400
Nov 21 08:40:28 soolean kernel: DMAR: DRHD: handling fault status reg 402
Nov 21 08:40:28 soolean kernel: DMAR: [DMA Write] Request device [04:00.1] fault addr 791e2000 [fault reason 05] PTE Write access is not set
Nov 21 08:40:28 soolean kernel: DMAR: [DMA Write] Request device [04:00.1] fault addr 791e2000 [fault reason 05] PTE Write access is not set
Nov 21 08:40:28 soolean kernel: DMAR: [DMA Write] Request device [04:00.1] fault addr 791e2000 [fault reason 05] PTE Write access is not set
Nov 21 08:40:28 soolean kernel: DMAR: DRHD: handling fault status reg 700
 


Even Redhat solutions suggests that as an answer, so try it? If that doesn't work try updating the servers hardware firmware.
 
Even Redhat solutions suggests that as an answer, so try it? If that doesn't work try updating the servers hardware firmware.
how to remove the intel_iommu=on from the Linux kernel boot parameters.

when I change this, how should I intervene if the operating system does not boot when I restart the server?
 
I've disabled virtualisation on the server. I'll check to see if that solves the problem

edit: the problem still persists

edit2 : grubby --update-kernel=ALL --remove-args="<PARAMETER_TO_REMOVE>" the problem still persists
remove intel_iommu


Code:
 cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-4.14.35-2025.403.3.el7uek.x86_64 root=/dev/mapper/ol-root ro rd.lvm.lv=ol/root rd.lvm.lv=ol/swap rhgb quiet LANG=en_US.UTF-8
 
Last edited:
I ran a different kernel on the operating system and the problem was resolved.
 
Last edited:

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