Re: [PATCH v3] mm/page_alloc: clear page->private in free_pages_prepare()

[David Hildenbrand (Arm)]

> -               /*
> -                * page->private should not be set in tail pages. Fix up 
> and warn once
> -                * if private is unexpectedly set.
> -                */
> -               if (unlikely(new_folio->private)) {
> -                       VM_WARN_ON_ONCE_PAGE(true, new_head);
> -                       new_folio->private = NULL;
> -               }

BTW, I wonder whether we should bring that check back for non-device folios.

--
Cheers,

David