Re: 2.6.13-rc6-git10 test report [x86_64](WITHOUT NVIDIA MODULE)

[Andi Kleen]

On Fri, Aug 19, 2005 at 08:38:25AM -0700, Peter Buckingham wrote:
> Hi Sean,
> 
> Sean Bruno wrote:
> >Well, I do have IOMMU enabled in my kernel .config.  I have attached it
> >to this message as well.  I would appreciate any guidance as I pretty
> >much have no idea what 99% of the items in here are for.  This is
> >the .config that I used to build the kernel from the dmesg output that
> >is attached to this email.
> 
> the error that you see is because you haven't set a big enough size in 
> the BIOS for the IOMMU. The error message is just saying that the kernel 
> is enabling the IOMMU anyway. It used to be that it would enable 64MB, 
> it looks like it's defaulting now to 256MB. When you enable a big enough 
> size in the bios this error will go away (assuming that your bios fills 
> in the registers correctly).

At least his original error message can only happen when  CONFIG_GART_IOMMU
is disabled.

PCI-DMA:  More that 4GB of RAM and no IOMMU                                                                                    
PCI-DMA:  32bit PCI IO may malfunction.<6>PCI-DMA:  Disabling IOMMU                                               


-Andi
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