Mapped file accounting depends on the the page being charged already,
or it won't get accounted properly, and the mapped file counter will
underflow during unmap later on.
Move mem_cgroup_migrate() before remove_migration_ptes().
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
---
mm/migrate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/migrate.c b/mm/migrate.c
index ab43fbfff8ba..7f5a42403fae 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -781,11 +781,11 @@ static int move_to_new_page(struct page *newpage, struct page *page,
if (!PageAnon(newpage))
newpage->mapping = NULL;
} else {
+ mem_cgroup_migrate(page, newpage, false);
if (remap_swapcache)
remove_migration_ptes(page, newpage);
if (!PageAnon(page))
page->mapping = NULL;
- mem_cgroup_migrate(page, newpage, false);
}
unlock_page(newpage);
--
2.0.0
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