From: Andrea Arcangeli <aarcange@redhat.com>
Date: Wed, 3 Oct 2012 23:51:06 +0000 (+0200)
Subject: mm: numa: split_huge_page: transfer the NUMA type from the pmd to the pte
X-Git-Tag: v3.8-rc1~92^2~35
X-Git-Url: http://git.cascardo.eti.br/?a=commitdiff_plain;h=1ba6e0b50b479cbadb8f05ebde3020da9ac87201;p=cascardo%2Flinux.git

mm: numa: split_huge_page: transfer the NUMA type from the pmd to the pte

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

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
---

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 35c66a269bcc..cd24aa562144 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);