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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 a720094ded ("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>
This commit is contained in:
Mel Gorman 2014-10-09 15:29:36 -07:00 committed by Linus Torvalds
parent 0085d61fe0
commit 2c0346a36c
1 changed files with 3 additions and 1 deletions
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4
mm/mempolicy.c
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@ -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;
}