Messages in this thread Patch in this message |  | | From | Mel Gorman <> | Subject | [PATCH 11/15] sched: numa: Skip inaccessible VMAs | Date | Tue, 3 Dec 2013 08:51:58 +0000 |
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Inaccessible VMA should not be trapping NUMA hint faults. Skip them.
Signed-off-by: Mel Gorman <mgorman@suse.de> --- kernel/sched/fair.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 7c70201..40d8ea3 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -970,6 +970,13 @@ void task_numa_work(struct callback_head *work) if (!vma_migratable(vma)) continue; + /* + * Skip inaccessible VMAs to avoid any confusion between + * PROT_NONE and NUMA hinting ptes + */ + if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE))) + continue; + /* Skip small VMAs. They are not likely to be of relevance */ if (vma->vm_end - vma->vm_start < HPAGE_SIZE) continue; -- 1.8.4
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