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, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>