From e12ba74d8ff3e2f73a583500d7095e406df4d093 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Tue, 16 Oct 2007 01:25:52 -0700 Subject: Group short-lived and reclaimable kernel allocations This patch marks a number of allocations that are either short-lived such as network buffers or are reclaimable such as inode allocations. When something like updatedb is called, long-lived and unmovable kernel allocations tend to be spread throughout the address space which increases fragmentation. This patch groups these allocations together as much as possible by adding a new MIGRATE_TYPE. The MIGRATE_RECLAIMABLE type is for allocations that can be reclaimed on demand, but not moved. i.e. they can be migrated by deleting them and re-reading the information from elsewhere. Signed-off-by: Mel Gorman Cc: Andy Whitcroft Cc: Christoph Lameter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mmzone.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'include/linux/mmzone.h') diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 7d7e4fe0fda..4721e9aa3ce 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -35,10 +35,12 @@ #ifdef CONFIG_PAGE_GROUP_BY_MOBILITY #define MIGRATE_UNMOVABLE 0 -#define MIGRATE_MOVABLE 1 -#define MIGRATE_TYPES 2 +#define MIGRATE_RECLAIMABLE 1 +#define MIGRATE_MOVABLE 2 +#define MIGRATE_TYPES 3 #else #define MIGRATE_UNMOVABLE 0 +#define MIGRATE_UNRECLAIMABLE 0 #define MIGRATE_MOVABLE 0 #define MIGRATE_TYPES 1 #endif -- cgit v1.2.3