On Sat, Nov 12, 2011 at 11:04 AM, Stepan Moskovchenko
[off-list ref] wrote:

Yes, the scatterlist is allowed to have different page sizes. But, they are
required to have a length that is a multiple of 4K. If a page in the list is

An element in scatterlist may not be aligned by 4K but I think IOMMU driver
must round it up to 4K if IOMMU API support iommu_map_range().

The first element in scatterlist is often not aligned by 4K if the pages are
provided from userspace. Length + offset of  the element must be
aligned by 4K, though.

Thank you,
KyongHo.