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| author | Mel Gorman <mgorman@suse.de> | 2014-10-10 00:29:36 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-10 04:26:02 +0200 |
| commit | 2c0346a36cc8ac6cb85ab585964590974c84bdf0 (patch) | |
| tree | b5bb4dd21c620286930404d173cf1d6ce16ef837 /mm/mempolicy.c | |
| parent | selftests/vm/transhuge-stress: stress test for memory compaction (diff) | |
| download | linux-2c0346a36cc8ac6cb85ab585964590974c84bdf0.tar.xz linux-2c0346a36cc8ac6cb85ab585964590974c84bdf0.zip | |
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 '')
| -rw-r--r-- | mm/mempolicy.c | 4 |
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; } |