Inaccessible VMA should not be trapping NUMA hint faults. Skip them.
Signed-off-by: Mel Gorman <[email protected]>
---
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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
