HP Proliant Gen9 G9 DMAR error

Запись создана 23 ноября, 2023

If you getting an error like this in dmesg on your linux and the physical server is a kind of HP Proliant G9 (Gen9)

 
DMAR: [DMA Write NO_PASID] Request device [04:00.0] fault addr 0x791f4000 [fault reason 0x05] PTE Write access is not set
DMAR: DRHD: handling fault status reg 402

You can just ignore it :)

OR if can reboot yourt server, there are several ways to «fix» it

pass a «intel_iommu=on» option to kernel or enter RBSU (BIOS) pressing F9 on startup screen
System configuration >> chose embeded LOM >> Device configuration menu >> SRV-IOV >> set Disabled

Same thing on HPE Proliant Gen10 is called «HP Shared Memory Features»