diff options
| author | Jiri Kosina <jkosina@suse.cz> | 2012-06-29 14:45:58 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2012-06-29 14:45:58 +0200 |
| commit | 59f91e5dd0504dc0ebfaa0b6f3a55e6931f96266 (patch) | |
| tree | b913718405d44a921905ac71044fbde410256865 /include/linux/compaction.h | |
| parent | 57bdfdd80077addf518a9b90c4a66890efc4f70e (diff) | |
| parent | 89abfab133ef1f5902abafb744df72793213ac19 (diff) | |
Merge branch 'master' into for-next
Conflicts:
include/linux/mmzone.h
Synced with Linus' tree so that trivial patch can be applied
on top of up-to-date code properly.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Diffstat (limited to 'include/linux/compaction.h')
| -rw-r--r-- | include/linux/compaction.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/compaction.h b/include/linux/compaction.h index 51a90b7f2d6..e988037abd2 100644 --- a/include/linux/compaction.h +++ b/include/linux/compaction.h @@ -1,6 +1,8 @@ #ifndef _LINUX_COMPACTION_H #define _LINUX_COMPACTION_H +#include <linux/node.h> + /* Return values for compact_zone() and try_to_compact_pages() */ /* compaction didn't start as it was not possible or direct reclaim was more suitable */ #define COMPACT_SKIPPED 0 @@ -11,6 +13,23 @@ /* The full zone was compacted */ #define COMPACT_COMPLETE 3 +/* + * compaction supports three modes + * + * COMPACT_ASYNC_MOVABLE uses asynchronous migration and only scans + * MIGRATE_MOVABLE pageblocks as migration sources and targets. + * COMPACT_ASYNC_UNMOVABLE uses asynchronous migration and only scans + * MIGRATE_MOVABLE pageblocks as migration sources. + * MIGRATE_UNMOVABLE pageblocks are scanned as potential migration + * targets and convers them to MIGRATE_MOVABLE if possible + * COMPACT_SYNC uses synchronous migration and scans all pageblocks + */ +enum compact_mode { + COMPACT_ASYNC_MOVABLE, + COMPACT_ASYNC_UNMOVABLE, + COMPACT_SYNC, +}; + #ifdef CONFIG_COMPACTION extern int sysctl_compact_memory; extern int sysctl_compaction_handler(struct ctl_table *table, int write, |