On Wed, 11 Jun 2014, Christoph Lameter wrote: > > > The zone should not cross the 8M boundary? > > > > Yes, but the question is: why? > > zones need to be aligned so that the huge pages order and other page > orders allocated from the page allocator are at their "natural alignment". > Otherwise huge pages cannot be mapped properly and various I/O devices > may encounter issues if they rely on the natural alignment. > Any reason not to align to HUGETLB_PAGE_ORDER on x86 instead of ZONE_ALIGN? -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html