[PATCH 2/4] mm: duplicate rmap reference for hugetlb pages as compound

From: Kirill A. Shutemov
Date: Tue Nov 03 2015 - 10:27:16 EST

Naoya noticed that I wrongly duplicate rmap reference for hugetlb pages
in remove_migration_pte() as non-compound. Let's fix this.

The patch can be folded into
"mm: rework mapcount accounting to enable 4k mapping of THPs"

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Reported-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
mm/migrate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 1ae0113559c9..b1034f9c77e7 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -165,7 +165,7 @@ static int remove_migration_pte(struct page *new, struct vm_area_struct *vma,
if (PageAnon(new))
hugepage_add_anon_rmap(new, vma, addr);
- page_dup_rmap(new, false);
+ page_dup_rmap(new, true);
} else if (PageAnon(new))
page_add_anon_rmap(new, vma, addr, false);

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