diff options
| author | Mel Gorman <mel@csn.ul.ie> | 2007-10-16 01:25:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:59 -0700 |
| commit | b92a6edd4b77a8794adb497280beea5df5e59a14 (patch) | |
| tree | 396ea5cf2b53fc066e949c443f03747ec868de1e /include | |
| parent | 535131e6925b4a95f321148ad7293f496e0e58d7 (diff) | |
Add a configure option to group pages by mobility
The grouping mechanism has some memory overhead and a more complex allocation
path. This patch allows the strategy to be disabled for small memory systems
or if it is known the workload is suffering because of the strategy. It also
acts to show where the page groupings strategy interacts with the standard
buddy allocator.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Joel Schopp <jschopp@austin.ibm.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mmzone.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 57700038e66..7d7e4fe0fda 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -33,9 +33,15 @@ */ #define PAGE_ALLOC_COSTLY_ORDER 3 +#ifdef CONFIG_PAGE_GROUP_BY_MOBILITY #define MIGRATE_UNMOVABLE 0 #define MIGRATE_MOVABLE 1 #define MIGRATE_TYPES 2 +#else +#define MIGRATE_UNMOVABLE 0 +#define MIGRATE_MOVABLE 0 +#define MIGRATE_TYPES 1 +#endif #define for_each_migratetype_order(order, type) \ for (order = 0; order < MAX_ORDER; order++) \ |