Comment 103 for bug 1810239

(In reply to CJ from comment #85)
> (In reply to Jerry Chen from comment #84)
> > This is weird.
> >
> > /var/log/messages is flooded with:
> > Aug 9 16:42:26 Hypervisor kernel: dmar: DRHD: handling fault status reg 3
> > Aug 9 16:42:26 Hypervisor kernel: dmar: DMAR:[DMA Read] Request device
> > [02:00.0] fault addr 100000000
> > Aug 9 16:42:26 Hypervisor kernel: DMAR:[fault reason 06] PTE Read access
> is
> > not set
> >
> > 02:00.0 is a PCI (not PCIe) Intel NIC
> >
> > # lspci
> > 02:00.0 Ethernet controller: Intel Corporation 82541PI Gigabit Ethernet
> > Controller (rev 05)
> >
> > # lspci -n
> > 02:00.0 0200: 8086:107c (rev 05)
> >
> > Any chances that this is related?
>
> Well, something happened between v3.12.26 & v3.16. Referring to "Comment
> 79" where these errors were produced on v3.16 with intel_iommu set as
> default (INTEL_IOMMU_DEFAULT=y), they do NOT show up on v3.12.26 with the
> default set. I know this will be fixed in 3.17. But, it looks like
> v3.12.26 somehow got looked over as it relates to this problem. This
> version, IMO, appears to be really solid.

You are right, 3.12.16 seems to be the perfect kernel on this issue.