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    Subject[PATCH v2 54/70] mm/khugepaged: Use maple tree iterators instead of vma linked list
    Date
    Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
    ---
    mm/khugepaged.c | 7 +++++--
    1 file changed, 5 insertions(+), 2 deletions(-)

    diff --git a/mm/khugepaged.c b/mm/khugepaged.c
    index 4e3dff13eb70c..fbfcee552da6c 100644
    --- a/mm/khugepaged.c
    +++ b/mm/khugepaged.c
    @@ -2049,6 +2049,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages,
    struct mm_struct *mm;
    struct vm_area_struct *vma;
    int progress = 0;
    + MA_STATE(mas, NULL, 0, 0);

    VM_BUG_ON(!pages);
    lockdep_assert_held(&khugepaged_mm_lock);
    @@ -2065,18 +2066,20 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages,
    khugepaged_collapse_pte_mapped_thps(mm_slot);

    mm = mm_slot->mm;
    + mas.tree = &mm->mm_mt;
    /*
    * Don't wait for semaphore (to avoid long wait times). Just move to
    * the next mm on the list.
    */
    vma = NULL;
    + mas_set(&mas, khugepaged_scan.address);
    if (unlikely(!mmap_read_trylock(mm)))
    goto breakouterloop_mmap_lock;
    if (likely(!khugepaged_test_exit(mm)))
    - vma = find_vma(mm, khugepaged_scan.address);
    + vma = mas_find(&mas, ULONG_MAX);

    progress++;
    - for (; vma; vma = vma->vm_next) {
    + mas_for_each(&mas, vma, ULONG_MAX) {
    unsigned long hstart, hend;

    cond_resched();
    --
    2.28.0
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