Commit 2c0346a3 authored Oct 09, 2014 by Mel Gorman Committed by Linus Torvalds Oct 09, 2014

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 a720094d ("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>

parent 0085d61f

mm/mempolicy.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -681,6 +681,8 @@ queue_pages_range(struct mm_struct *mm, unsigned long start, unsigned long end,
		}

		if (flags & MPOL_MF_LAZY) {
		/* Similar to task_numa_work, skip inaccessible VMAs */
		if (vma->vm_flags & (VM_READ \| VM_EXEC \| VM_WRITE))
		change_prot_numa(vma, start, endvma);
		goto next;
		}