[PATCH v2 3/7] mm/page_owner: copy last_migrate_reason in copy_page_owner()

js1304
2016-05-26T02:38:12Z

From: Joonsoo Kim <iamjoonsoo.kim@lge.com>

Currently, copy_page_owner() doesn't copy all the owner information.
It skips last_migrate_reason because copy_page_owner() is used for
migration and it will be properly set soon. But, following patch
will use copy_page_owner() and this skip will cause the problem that
allocated page has uninitialied last_migrate_reason. To prevent it,
this patch also copy last_migrate_reason in copy_page_owner().

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
---
mm/page_owner.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/mm/page_owner.c b/mm/page_owner.c
index c6cda3e..73e202f 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -118,6 +118,7 @@ void __copy_page_owner(struct page *oldpage, struct page *newpage)

new_ext->order = old_ext->order;
new_ext->gfp_mask = old_ext->gfp_mask;
+ new_ext->last_migrate_reason = old_ext->last_migrate_reason;
new_ext->nr_entries = old_ext->nr_entries;

for (i = 0; i < ARRAY_SIZE(new_ext->trace_entries); i++)
--
1.9.1