On Wed, 2015-06-10 at 14:27 +0800, Wenwei Tao wrote: > Hugetlb VMAs are not mergeable, that means a VMA couldn't have VM_HUGETLB > and > VM_MERGEABLE been set in the same time. So we use VM_HUGETLB to indicate new > mergeable VMAs. Because of that a VMA which has VM_HUGETLB been set is a > hugetlb > VMA only if it doesn't have VM_MERGEABLE been set in the same time. Eww. If you must overload such bit combinations, please hide it behind a vm_is_hugetlb() function. -Scott -- 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>