Krzysztof Halasa <khc@xxxxxxxxx> writes:
Jari Aalto <jari.aalto@xxxxxxxxx> writes:
>From Debian stock kernel:Should be fine. SWIOTLB is there for a backup, most (?) Intel machines
$ grep -Ei 'iommu|agp' /boot/config-2.6.25-2-amd64
CONFIG_GART_IOMMU=y
CONFIG_CALGARY_IOMMU=y
CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT=y
CONFIG_IOMMU_HELPER=y
CONFIG_AGP=y
CONFIG_AGP_AMD64=y
CONFIG_AGP_INTEL=m
CONFIG_AGP_SIS=m
CONFIG_AGP_VIA=m
don't have IOMMU (even the newest desktop boards).
Are these the correct boot options, without swiotlb?Do you have problems without "iommu=XXX"?
iommu=noagp,noaperture,off
Or just:
iommu=off
Initially when the PC was installed (and had no IOMMU) options, that
cause the whole harddisk to corrupt and I had to reinstall everything.
It might have been a little older kernel (2.6.23?), but I don't recall
it exactly.
According to messages in syslog I tried to track down similar incidents
and found the iommu articles. But the information was like trial and
error.
Would you suggest that "immu=off" would be best option?