Currently charge on shared anonyous pages is supposed not to moved
in task migration. To implement this, we need to check that mapcount > 1,
instread of > 2. So this patch fixes it.
Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
---
mm/memcontrol.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git linux-next-20120228.orig/mm/memcontrol.c linux-next-20120228/mm/memcontrol.c
index b6d1bab..785f6d3 100644
--- linux-next-20120228.orig/mm/memcontrol.c
+++ linux-next-20120228/mm/memcontrol.c
@@ -5102,7 +5102,7 @@ static struct page *mc_handle_present_pte(struct vm_area_struct *vma,
return NULL;
if (PageAnon(page)) {
/* we don't move shared anon */
- if (!move_anon() || page_mapcount(page) > 2)
+ if (!move_anon() || page_mapcount(page) > 1)
return NULL;
} else if (!move_file())
/* we ignore mapcount for file pages */
--
1.7.7.6
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