Re: [PATCH RFC 07/35] mm/memremap: reject unreasonable folio/compound page sizes in memremap_pages()

SeongJae Park
2025-08-22T17:10:45Z

On Thu, 21 Aug 2025 22:06:33 +0200 David Hildenbrand <david@redhat.com> wrote:

> Let's reject unreasonable folio sizes early, where we can still fail.
> We'll add sanity checks to prepare_compound_head/prepare_compound_page
> next.
>
> Is there a way to configure a system such that unreasonable folio sizes
> would be possible? It would already be rather questionable.
>
> If so, we'd probably want to bail out earlier, where we can avoid a
> WARN and just report a proper error message that indicates where
> something went wrong such that we messed up.
>
> Signed-off-by: David Hildenbrand <david@redhat.com>

Acked-by: SeongJae Park <sj@kernel.org>

Thanks,
SJ …