diff options
| author | Mel Gorman <mel@csn.ul.ie> | 2007-10-16 12:25:52 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 20:43:00 +0400 |
| commit | e12ba74d8ff3e2f73a583500d7095e406df4d093 (patch) | |
| tree | a0d3385b65f0b3e1e00b0bbf11b75e7538a93edb /include/linux/mmzone.h | |
| parent | c361be55b3128474aa66d31092db330b07539103 (diff) | |
| download | linux-e12ba74d8ff3e2f73a583500d7095e406df4d093.tar.xz | |
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 <mel@csn.ul.ie>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mmzone.h')
| -rw-r--r-- | include/linux/mmzone.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 7d7e4fe0fda8..4721e9aa3ced 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 |