Messages in this thread Patch in this message | | | From | Mel Gorman <> | Subject | [PATCH 08/18] sched: numa: Skip inaccessible VMAs | Date | Mon, 9 Dec 2013 07:09:02 +0000 |
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Inaccessible VMA should not be trapping NUMA hint faults. Skip them.
Cc: stable@vger.kernel.org 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 e8b652e..1ce1615 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1752,6 +1752,13 @@ void task_numa_work(struct callback_head *work) (vma->vm_file && (vma->vm_flags & (VM_READ|VM_WRITE)) == (VM_READ))) 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; + do { start = max(start, vma->vm_start); end = ALIGN(start + (pages << PAGE_SHIFT), HPAGE_SIZE); -- 1.8.4
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