mm: add new arch_make_huge_pte() method for tile support (d9ed9faa) · Commits · 戴 / test

The tile support for multiple-size huge pages requires tagging the hugetlb PTE with a "super" bit for PTEs that are multiples of the basic size of a pagetable span. To set that bit properly we need to tweak the PTe in make_huge_pte() based on the vma. This change provides the API for a subsequent tile-specific change to use. Reviewed-by:

Hillf Danton <dhillf@gmail.com> Signed-off-by:

Chris Metcalf <cmetcalf@tilera.com>

include/linux/hugetlb.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -284,6 +284,14 @@ static inline unsigned int blocks_per_huge_page(struct hstate *h)

		#include <asm/hugetlb.h>

		#ifndef arch_make_huge_pte
		static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
		struct page *page, int writable)
		{
		return entry;
		}
		#endif

		static inline struct hstate page_hstate(struct page page)
		{
		return size_to_hstate(PAGE_SIZE << compound_order(page));

mm/hugetlb.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2213,6 +2213,7 @@ static pte_t make_huge_pte(struct vm_area_struct vma, struct page page,
		}
		entry = pte_mkyoung(entry);
		entry = pte_mkhuge(entry);
		entry = arch_make_huge_pte(entry, vma, page, writable);

		return entry;
		}

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