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    Subject[PATCH 25/40] autonuma: follow_page check for pte_numa/pmd_numa
    Date
    Without this, follow_page wouldn't trigger the NUMA hinting faults.

    Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
    ---
    mm/memory.c | 4 ++--
    1 files changed, 2 insertions(+), 2 deletions(-)

    diff --git a/mm/memory.c b/mm/memory.c
    index 2e9cab2..78b6acc 100644
    --- a/mm/memory.c
    +++ b/mm/memory.c
    @@ -1491,7 +1491,7 @@ struct page *follow_page(struct vm_area_struct *vma, unsigned long address,
    goto no_page_table;

    pmd = pmd_offset(pud, address);
    - if (pmd_none(*pmd))
    + if (pmd_none(*pmd) || pmd_numa(*pmd))
    goto no_page_table;
    if (pmd_huge(*pmd) && vma->vm_flags & VM_HUGETLB) {
    BUG_ON(flags & FOLL_GET);
    @@ -1525,7 +1525,7 @@ split_fallthrough:
    ptep = pte_offset_map_lock(mm, pmd, address, &ptl);

    pte = *ptep;
    - if (!pte_present(pte))
    + if (!pte_present(pte) || pte_numa(pte))
    goto no_page;
    if ((flags & FOLL_WRITE) && !pte_write(pte))
    goto unlock;

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