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

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

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