On Tue, Jul 21, 2015 at 5:59 PM, Baoquan He <[email protected]> wrote: >> That commit should only be used to workaround some systems that >> have partial iommu support. > > Those big servers mostly has hardware iommu. But they still can > enable swiotlb suport. Then low memory is needed.
Do you have whole bootlog? I don't understand why those system can not use full iommu. BIOS problem or HW/silicon limitation? Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
