On Fri, Jun 15, 2018 at 08:45:21PM +0000, Dave Hansen wrote: > On 06/15/2018 01:45 PM, Kirill A. Shutemov wrote: > > On Fri, Jun 15, 2018 at 04:58:24PM +0000, Dave Hansen wrote: > >> On 06/15/2018 09:06 AM, Kirill A. Shutemov wrote: > >>> I have no idea what such concept should be called. I cannot come with > >>> anything better than PTE_PFN_MASK_MAX. Do you? > >> PTE_PRESERVE_MASK > >> > >> Or maybe: > >> > >> PTE_MODIFY_PRESERVE_MASK > > It just replacing one confusion with another. Preserve what? > > "Preserve this mask when modifying pte permission bits" We preserve more than these bits. See _PAGE_CHG_MASK. -- Kirill A. Shutemov
