On Wed, Aug 4, 2021 at 8:27 AM Kirill A. Shutemov <kirill@shutemov.name>
wrote:

> On Sat, Jul 31, 2021 at 12:39:38AM -0600, Yu Zhao wrote:
> > @@ -267,13 +308,19 @@ static bool remove_migration_pte(struct page
> *page, struct vm_area_struct *vma,
> >   * Get rid of all migration entries and replace them by
> >   * references to the indicated page.
> >   */
> > -void remove_migration_ptes(struct page *old, struct page *new, bool
> locked)
> > +void remove_migration_ptes(struct page *old, struct page *new, bool
> locked, bool unmap_clean)
> >  {
> > +     struct rmap_walk_arg rmap_walk_arg = {
> > +             .page = old,
> > +             .unmap_clean = unmap_clean,
> > +     };
> >       struct rmap_walk_control rwc = {
> >               .rmap_one = remove_migration_pte,
> > -             .arg = old,
> > +             .arg = &rmap_walk_arg,
> >       };
>
> 'old' pointer has few low always-zero bit :P
>

Will do. Thanks.