On Thu, 11 Apr 2013, Simon Jeons wrote: > It seems that I need to simple my question. > All pages which order >=1 are compound pages? In the slub allocator that is true. One can request and free a series of contiguous pages that are not compound pages from the page allocator and a couple of subsystems use those. -- 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>