[PATCH 01/14] mm, compaction: Shrink compact_control

Mel Gorman
2018-12-14T23:03:53Z

The isolate and migrate scanners should never isolate more than a pageblock
of pages so unsigned int is sufficient saving 8 bytes on a 64-bit build.

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
---
mm/internal.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/internal.h b/mm/internal.h
index 536bc2a839b9..5564841fce36 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -185,8 +185,8 @@ struct compact_control {
struct list_head freepages; /* List of free pages to migrate to */
struct list_head migratepages; /* List of pages being migrated */
struct zone *zone;
- unsigned long nr_freepages; /* Number of isolated free pages */
- unsigned long nr_migratepages; /* Number of pages to migrate */
+ unsigned int nr_freepages; /* Number of isolated free pages */
+ unsigned int nr_migratepages; /* Number of pages to migrate */
unsigned long total_migrate_scanned;
unsigned long total_free_scanned;
unsigned long free_pfn; /* isolate_freepages search base */
--
2.16.4