On 10/21/22 16:36, James Houghton wrote:
> This is a simple change: don't create a "huge" PTE if we are making a
> regular, PAGE_SIZE PTE. All architectures that want to implement HGM
> likely need to be changed in a similar way if they implement their own
> version of arch_make_huge_pte.
Nothing wrong with this patch.
However, I wish there was some way we could flag this requirement in
arch specific code. Just seems like something that would be easy to
overlook.
--
Mike Kravetz
> Signed-off-by: James Houghton <jthoughton@google.com>
> ---
> include/linux/hugetlb.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
> index 4b1548adecde..d305742e9d44 100644
> --- a/include/linux/hugetlb.h
> +++ b/include/linux/hugetlb.h
> @@ -907,7 +907,7 @@ static inline void arch_clear_hugepage_flags(struct page *page) { }
> static inline pte_t arch_make_huge_pte(pte_t entry, unsigned int shift,
> vm_flags_t flags)
> {
> - return pte_mkhuge(entry);
> + return shift > PAGE_SHIFT ? pte_mkhuge(entry) : entry;
> }
> #endif
>
> --
> 2.38.0.135.g90850a2211-goog
>