Messages in this thread |  | | Date | Sun, 22 Nov 2020 15:30:30 +0200 | From | Mike Rapoport <> | Subject | Re: [PATCH v5 21/21] mm/hugetlb: Disable freeing vmemmap if struct page size is not power of two |
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On Fri, Nov 20, 2020 at 10:15:30AM +0100, David Hildenbrand wrote: > 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.
Or multiples of 4 for 32-bit (28, 32, 36).
> -- > Thanks, > > David / dhildenb > >
-- Sincerely yours, Mike.
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