Re: [PATCH v5 21/21] mm/hugetlb: Disable freeing vmemmap if struct page size is not power of two

[David Hildenbrand <david@xxxxxxxxxx>]

On 20.11.20 09:25, Michal Hocko wrote:
> On Fri 20-11-20 14:43:25, Muchun Song wrote:
> > We only can free the unused vmemmap to the buddy system when the
> > size of struct page is a power of two.
>
> Can we actually have !power_of_2 struct pages?

AFAIK multiples of 8 bytes (56, 64, 72) are possible.


--
Thanks,

David / dhildenb