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On Thu, 2006-09-21 at 02:03 +0100, Alan Cox wrote: > IOMMUs don't always help. They IOMMU aperture on AMD64 for example is > too high to help devices with below 32bit limits. That's because it's not an IOMMU; it's a GART. A true IOMMU separates the machine physical and bus physical address spaces ... a GART merely remaps a hole in physical address space. James - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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