On Wed, Jul 01, 2015 at 02:30:58PM -0400, Aristeu Rozanski wrote:
> This check was introduced as part of
> 6f4576e3687 - mempolicy: apply page table walker on queue_pages_range()
> which got duplicated by
> 48684a65b4e - mm: pagewalk: fix misbehavior of walk_page_range for vma(VM_PFNMAP)
> by reintroducing it earlier on queue_page_test_walk()
>
> Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
> Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
> Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
> Cc: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
> Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
> Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Aristeu Rozanski <aris@xxxxxxxxxx>
Thank you for finding and fixing this.
Acked-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
> diff --git a/mm/mempolicy.c b/mm/mempolicy.c
> index 99d4c1d..9885d07 100644
> --- a/mm/mempolicy.c
> +++ b/mm/mempolicy.c
> @@ -608,9 +608,6 @@ static int queue_pages_test_walk(unsigned long start, unsigned long end,
>
> qp->prev = vma;
>
> - if (vma->vm_flags & VM_PFNMAP)
> - return 1;
> -
> if (flags & MPOL_MF_LAZY) {
> /* Similar to task_numa_work, skip inaccessible VMAs */
> if (vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE))
>
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