> @@ -2317,8 +2319,8 @@ int mpol_misplaced(struct page *page, struct
> vm_area_struct *vma, unsigned long
>                  * it less likely we act on an unlikely task<->page
>                  * relation.
>                  */
> -               last_nid = page_nid_xchg_last(page, polnid);
> -               if (last_nid != polnid)
> +               last_nidpid = page_nidpid_xchg_last(page, this_nidpid);
> +               if (!nidpid_pid_unset(last_nidpid) &&
> nidpid_to_nid(last_nidpid) != polnid)
>                         goto out;
>         }
>
>
Suppose that the first accessed page it will check the "if (curnid !=
polnid)" and maybe migrate the page later.
so maybe modify like that:

+               last_nidpid = page_nidpid_xchg_last(page, this_nidpid);
+               if  (nidpid_pid_unset(last_nidpid))
+                     goto out;
+               else if (nidpid_to_nid(last_nidpid) != polnid)
                        goto out;

Best,
Figo.zhang