[PATCH 14/49] mm: numa: split_huge_page: transfer the NUMA type from the pmd to the pte

From: Mel Gorman
Date: Fri Dec 07 2012 - 05:24:16 EST

From: Andrea Arcangeli <aarcange@xxxxxxxxxx>

When we split a transparent hugepage, transfer the NUMA type from the
pmd to the pte if needed.

Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
mm/huge_memory.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 40f17c3..3aaf242 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1363,6 +1363,8 @@ static int __split_huge_page_map(struct page *page,
BUG_ON(page_mapcount(page) != 1);
if (!pmd_young(*pmd))
entry = pte_mkold(entry);
+ if (pmd_numa(*pmd))
+ entry = pte_mknuma(entry);
pte = pte_offset_map(&_pmd, haddr);
set_pte_at(mm, haddr, pte, entry);

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