Re: [PATCH v1 17/29] mm/page_isolation: drop __folio_test_movable() check for large folios

[David Hildenbrand]

On 01.07.25 13:03, Lorenzo Stoakes wrote:
> On Mon, Jun 30, 2025 at 02:59:58PM +0200, David Hildenbrand wrote:
> > Currently, we only support migration of individual movable_ops pages, so
> > we can not run into that.
> >
> > Reviewed-by: Zi Yan <ziy@xxxxxxxxxx>
> > Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
>
> Seems sensible, so:
>
> Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
>
> Maybe worth adding a VM_WARN_ON_ONCE() just in case? Or do you think not worth it?

Not for now I think. Whoever wants to support compound pages has to 
fixup a bunch of other stuff first, before running into that one here.

So a full audit of all paths that handle page_has_movable_ops() is 
required either way.

--
Cheers,

David / dhildenb