thp: split_huge_page_mm/vma
split_huge_page_pmd compat code. Each one of those would need to be expanded to hundred of lines of complex code without a fully reliable split_huge_page_pmd design. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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6 changed files with 6 additions and 0 deletions
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@ -179,6 +179,7 @@ static void mark_screen_rdonly(struct mm_struct *mm)
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if (pud_none_or_clear_bad(pud))
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goto out;
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pmd = pmd_offset(pud, 0xA0000);
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split_huge_page_pmd(mm, pmd);
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if (pmd_none_or_clear_bad(pmd))
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goto out;
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pte = pte_offset_map_lock(mm, pmd, 0xA0000, &ptl);
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@ -514,6 +514,7 @@ static inline int check_pmd_range(struct vm_area_struct *vma, pud_t *pud,
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pmd = pmd_offset(pud, addr);
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do {
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next = pmd_addr_end(addr, end);
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split_huge_page_pmd(vma->vm_mm, pmd);
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if (pmd_none_or_clear_bad(pmd))
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continue;
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if (check_pte_range(vma, pmd, addr, next, nodes,
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@ -154,6 +154,7 @@ static void mincore_pmd_range(struct vm_area_struct *vma, pud_t *pud,
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pmd = pmd_offset(pud, addr);
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do {
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next = pmd_addr_end(addr, end);
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split_huge_page_pmd(vma->vm_mm, pmd);
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if (pmd_none_or_clear_bad(pmd))
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mincore_unmapped_range(vma, addr, next, vec);
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else
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@ -88,6 +88,7 @@ static inline void change_pmd_range(struct mm_struct *mm, pud_t *pud,
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pmd = pmd_offset(pud, addr);
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do {
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next = pmd_addr_end(addr, end);
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split_huge_page_pmd(mm, pmd);
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if (pmd_none_or_clear_bad(pmd))
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continue;
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change_pte_range(mm, pmd, addr, next, newprot, dirty_accountable);
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@ -41,6 +41,7 @@ static pmd_t *get_old_pmd(struct mm_struct *mm, unsigned long addr)
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return NULL;
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pmd = pmd_offset(pud, addr);
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split_huge_page_pmd(mm, pmd);
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if (pmd_none_or_clear_bad(pmd))
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return NULL;
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@ -34,6 +34,7 @@ static int walk_pmd_range(pud_t *pud, unsigned long addr, unsigned long end,
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pmd = pmd_offset(pud, addr);
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do {
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next = pmd_addr_end(addr, end);
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split_huge_page_pmd(walk->mm, pmd);
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if (pmd_none_or_clear_bad(pmd)) {
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if (walk->pte_hole)
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err = walk->pte_hole(addr, next, walk);
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