Re: data corruption with nvidia chipsets and IDE/SATA drives // memory hole mapping related bug?!

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On Mon Dec 11, 2006 at 10:24:02AM +0100, Karsten Weiss wrote:
> Last week we did some more testing with the following result:
> 
> We could not reproduce the data corruption anymore if we boot the machines 
> with the kernel parameter "iommu=soft" i.e. if we use software bounce 
> buffering instead of the hw-iommu. (As mentioned before, booting with 
> mem=2g works fine, too, because this disables the iommu altogether.)
> 
> I.e. on these systems the data corruption only happens if the hw-iommu 
> (PCI-GART) of the Opteron CPUs is in use.
> 
> Christoph, Erik, Chris: I would appreciate if you would test and hopefully 
> confirm this workaround, too.

What did you set the BIOS to when testing this setting?
Memory Hole enabled?  IOMMU enabled?

 -Erik

--
Erik B. Andersen             http://codepoet-consulting.com/
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