@@ -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