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authorMel Gorman <mgorman@suse.de>2014-10-09 15:29:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-09 22:26:02 -0400
commit2c0346a36cc8ac6cb85ab585964590974c84bdf0 (patch)
treeb5bb4dd21c620286930404d173cf1d6ce16ef837 /mm
parent0085d61fe05ec5a3739afb8ffb8a88130402633e (diff)
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>
Diffstat (limited to 'mm')
-rw-r--r--mm/mempolicy.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 008fb32936eb..e58725aff7e9 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -681,7 +681,9 @@ queue_pages_range(struct mm_struct *mm, unsigned long start, unsigned long end,
}
if (flags & MPOL_MF_LAZY) {
- change_prot_numa(vma, start, endvma);
+ /* 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;
}

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