diff options
Diffstat (limited to 'include/linux/compaction.h')
| -rw-r--r-- | include/linux/compaction.h | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/include/linux/compaction.h b/include/linux/compaction.h index 01e3132820da..60bdf8dc02a3 100644 --- a/include/linux/compaction.h +++ b/include/linux/compaction.h @@ -2,14 +2,24 @@ #define _LINUX_COMPACTION_H /* Return values for compact_zone() and try_to_compact_pages() */ +/* compaction didn't start as it was deferred due to past failures */ +#define COMPACT_DEFERRED 0 /* compaction didn't start as it was not possible or direct reclaim was more suitable */ -#define COMPACT_SKIPPED 0 +#define COMPACT_SKIPPED 1 /* compaction should continue to another pageblock */ -#define COMPACT_CONTINUE 1 +#define COMPACT_CONTINUE 2 /* direct compaction partially compacted a zone and there are suitable pages */ -#define COMPACT_PARTIAL 2 +#define COMPACT_PARTIAL 3 /* The full zone was compacted */ -#define COMPACT_COMPLETE 3 +#define COMPACT_COMPLETE 4 + +/* Used to signal whether compaction detected need_sched() or lock contention */ +/* No contention detected */ +#define COMPACT_CONTENDED_NONE 0 +/* Either need_sched() was true or fatal signal pending */ +#define COMPACT_CONTENDED_SCHED 1 +/* Zone lock or lru_lock was contended in async compaction */ +#define COMPACT_CONTENDED_LOCK 2 #ifdef CONFIG_COMPACTION extern int sysctl_compact_memory; @@ -22,7 +32,8 @@ extern int sysctl_extfrag_handler(struct ctl_table *table, int write, extern int fragmentation_index(struct zone *zone, unsigned int order); extern unsigned long try_to_compact_pages(struct zonelist *zonelist, int order, gfp_t gfp_mask, nodemask_t *mask, - enum migrate_mode mode, bool *contended); + enum migrate_mode mode, int *contended, + struct zone **candidate_zone); extern void compact_pgdat(pg_data_t *pgdat, int order); extern void reset_isolation_suitable(pg_data_t *pgdat); extern unsigned long compaction_suitable(struct zone *zone, int order); @@ -91,7 +102,8 @@ static inline bool compaction_restarting(struct zone *zone, int order) #else static inline unsigned long try_to_compact_pages(struct zonelist *zonelist, int order, gfp_t gfp_mask, nodemask_t *nodemask, - enum migrate_mode mode, bool *contended) + enum migrate_mode mode, int *contended, + struct zone **candidate_zone) { return COMPACT_CONTINUE; } |