From: "minkyung88.kim" <minkyung88.kim@xxxxxxx>
NR_FREEPAGE should be decreased when pages are isolated from buddy.
Therefore fix the count.
Signed-off-by: minkyung88.kim <minkyung88.kim@xxxxxxx>
---
mm/page_isolation.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 303c908..16cc172 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -233,10 +233,14 @@ __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn,
*/
if (get_freepage_migratetype(page) != MIGRATE_ISOLATE) {
struct page *end_page;
+ struct zone *zone = page_zone(page);
+ int mt = get_freepage_migratetype(page);
+ unsigned long nr_pages;
end_page = page + (1 << page_order(page)) - 1;
- move_freepages(page_zone(page), page, end_page,
+ nr_pages = move_freepages(zone, page, end_page,
MIGRATE_ISOLATE);
+ __mod_zone_freepage_state(zone, -nr_pages, mt);
}
pfn += 1 << page_order(page);
}
--
2.1.4
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