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On Saturday 25 March 2006 17:58, Boyd Stephen Smith Jr. wrote:
>
> I had something like this happening on my 4GB system. With IOMMU off, I'd
> only have access to like 2G of memory. With IOMMU on, I had various
> results, ranging from kernel panic before initrd is loaded to missing
> memory (small, like maybe the size of my PCI IO window?) to a completely
> working system with devices properly mapped to memory addresses beyond my
> physical RAM. These various behaviors were controlled, oddly enough, by
> my BIOS settings.
>
> I'm running a Tyan Dual-Opteron Dual-PCIe board... If you've got a similar
> board, I can share my BIOS and kernel settings and maybe you can resolve
> your IOMMU issues.
Just out of curiousity, is it the Tyan S2895?
Bill Tetrault
Madison, WI
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