From be7517d6ab9722f0abad6ba5ffd39cfced95549c Mon Sep 17 00:00:00 2001 From: Tony Lu Date: Mon, 4 Feb 2013 14:28:46 -0800 Subject: [PATCH] mm/hugetlb: set PTE as huge in hugetlb_change_protection and remove_migration_pte When setting a huge PTE, besides calling pte_mkhuge(), we also need to call arch_make_huge_pte(), which we indeed do in make_huge_pte(), but we forget to do in hugetlb_change_protection() and remove_migration_pte(). Signed-off-by: Zhigang Lu Signed-off-by: Chris Metcalf Reviewed-by: Michal Hocko Acked-by: Hillf Danton Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/hugetlb.c | 1 + mm/migrate.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 4f3ea0b1e57c..546db81820e4 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3033,6 +3033,7 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma, if (!huge_pte_none(huge_ptep_get(ptep))) { pte = huge_ptep_get_and_clear(mm, address, ptep); pte = pte_mkhuge(pte_modify(pte, newprot)); + pte = arch_make_huge_pte(pte, vma, NULL, 0); set_huge_pte_at(mm, address, ptep, pte); pages++; } diff --git a/mm/migrate.c b/mm/migrate.c index c38778610aa8..2fd8b4af4744 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -160,8 +160,10 @@ static int remove_migration_pte(struct page *new, struct vm_area_struct *vma, if (is_write_migration_entry(entry)) pte = pte_mkwrite(pte); #ifdef CONFIG_HUGETLB_PAGE - if (PageHuge(new)) + if (PageHuge(new)) { pte = pte_mkhuge(pte); + pte = arch_make_huge_pte(pte, vma, new, 0); + } #endif flush_cache_page(vma, addr, pte_pfn(pte)); set_pte_at(mm, addr, ptep, pte);