From: Andrea Arcangeli <[email protected]>

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

Signed-off-by: Andrea Arcangeli <[email protected]>
Signed-off-by: Mel Gorman <[email protected]>
Reviewed-by: Rik van Riel <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Paul Turner <[email protected]>
Cc: Lee Schermerhorn <[email protected]>
Cc: Alex Shi <[email protected]>
Cc: Srikar Dronamraju <[email protected]>
Cc: Aneesh Kumar <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
---
 mm/huge_memory.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 35c66a2..cd24aa5 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1364,6 +1364,8 @@ 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);
                        BUG_ON(!pte_none(*pte));
                        set_pte_at(mm, haddr, pte, entry);
-- 
1.7.11.7

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