Failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA
Updated -
On Intel based systems running the RHEL8 kernel you may see messages like the following:
pci 0000:00:00.0: failed to allocate default IOMMU domain of type 4; falling back to IOMMU_DOMAIN_DMA.
These messages are benign. Due to changes in the RHEL8 kernel the default iommu domain type is now IOMMU_DOMAIN_IDENTITY. When the iommu code does domain allocation the call to the intel dom...
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