Eric Lee / smarc-ti-linux-kernel

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Commit 2c0346a36cc8ac6cb85ab585964590974c84bdf0

Authored by Mel Gorman
Committed by Linus Torvalds
1 parent 0085d61fe0
Exists in ti-lsk-linux-4.1.y and in 10 other branches dlt-processor-sdk-linux-03.00.00.04, processor-sdk-linux-02.00.01, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04

mm: mempolicy: skip inaccessible VMAs when setting MPOL_MF_LAZY 

PROT_NUMA VMAs are skipped to avoid problems distinguishing between
present, prot_none and special entries.  MPOL_MF_LAZY is not visible from
userspace since commit a720094ded8c ("mm: mempolicy: Hide MPOL_NOOP and
MPOL_MF_LAZY from userspace for now") but it should still skip VMAs the
same way task_numa_work does.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Hugh Dickins <hughd@google.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Showing 1 changed file with 3 additions and 1 deletions Side-by-side Diff

... ... @@ -681,7 +681,9 @@
681 681 }
682 682  
683 683 if (flags & MPOL_MF_LAZY) {
684   - change_prot_numa(vma, start, endvma);
  684 + /* Similar to task_numa_work, skip inaccessible VMAs */
  685 + if (vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE))
  686 + change_prot_numa(vma, start, endvma);
685 687 goto next;
686 688 }
687 689