DMAR:[fault reason 06] PTE Read access is not set

    ����˵����ʹ��USB�豸����Linuxϵͳ�������������ºܿ��ܵ��¸��ļ�ϵͳ����������µ���־�쳣���£�

dmar:DRHD: handling fault status reg 2
dmar:DMAR:[DMA Read] Request device [00:1f.2] fault addr caa40000
DMAR:[fault reason 06] PTE Read access is not set

Ȼ��������µ����⣺

����1��DRHD��ʲô
����2��DMAR��ʲô
����3��00:1f.2��ʲô��ַ��ָ��˭
����4��PTE��ʲô
����5��NIC��ʲô
����6��DPDK��ʲô
If you don't test the DPDK in virtualization environment.
The easy way to fix it is to disable the VT-d in the BIOS

������google��ԭ�ģ�

 

google��˵���������ͨ���޸��ں˲������
intel_iommu=off or intel_iommu=pt
������Ч������ˮƽ���������ǣ�
I've googled that the errors should dissapear after setting intel_iommu=off or intel_iommu=pt kernel parameter but for me it's not

working at all. I've only learned that I shoudn't ignore this error as it affects
performance (which is correct as my fps in games dropped badly) and destroy filesystems����ע����
���ļ�ϵͳ�� (I don't understand why as it suppouse to be problem with video driver)
ȷʵ���ֳ��з���������⣬���ļ�ϵͳ���������ҵ������U���޷���ʽ�������ֻ����
��ȫover�ˡ�

I solved it by disabling virtualization support in bios... I don't get a thing now but I'm not using it anyway so... solved?
Edit: not solved, sorry, it was just for one reboot, probably prompt didn't appear for some reason...

�������Ϸ��ֲ����ǣ� intel_iommu=igfx_off ����dmar�����bios�������������ⲻ�ö�֪
Okay, so basically the command needs to be intel_iommu=igfx_off now (this error is rare and my previous search gave me solution

from 2009) and it fixed the issue. As I've learned, the error is because dmar tables or my BIOS are broken... don't really know

what it does, I'll check for upgrade but it's not Linux fault so I'm markin it as solved after all...

������������ѵ㣺
1���ô����Ƿ�������ļ�ϵͳ��
2���ô����Ƿ���Ӳ������