On 06/28/2012 08:55 AM, Andrea Arcangeli wrote:

+/*
+ * Cannot be set on pte. The fact it's in between _PAGE_FILE and
+ * _PAGE_PROTNONE avoids having to alter the swp entries.
+ */
+#define _PAGE_NUMA_PTE	_PAGE_PSE
+/*
+ * Cannot be set on pmd, if transparent hugepages will be swapped out
+ * the swap entry offset must start above it.
+ */
+#define _PAGE_NUMA_PMD	_PAGE_UNUSED2

Those comments only tell us what the flags can NOT be
used for, not what they are actually used for.

That needs to be fixed.

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