diff options
| -rw-r--r-- | include/linux/memcontrol.h | 8 | ||||
| -rw-r--r-- | mm/memcontrol.c | 14 |
2 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 085cdcd817b0..bb9c079eeb0c 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -68,6 +68,8 @@ extern void mem_cgroup_page_migration(struct page *page, struct page *newpage); * For memory reclaim. */ extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem); +extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem); + #else /* CONFIG_CGROUP_MEM_CONT */ @@ -145,6 +147,12 @@ static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) { return 0; } + +static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem) +{ + return 0; +} + #endif /* CONFIG_CGROUP_MEM_CONT */ #endif /* _LINUX_MEMCONTROL_H */ diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 2ef214ed5cf8..78a928d90267 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -436,6 +436,20 @@ int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) rss = (long)mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_RSS); return (int)((rss * 100L) / total); } +/* + * This function is called from vmscan.c. In page reclaiming loop. balance + * between active and inactive list is calculated. For memory controller + * page reclaiming, we should use using mem_cgroup's imbalance rather than + * zone's global lru imbalance. + */ +long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem) +{ + unsigned long active, inactive; + /* active and inactive are the number of pages. 'long' is ok.*/ + active = mem_cgroup_get_all_zonestat(mem, MEM_CGROUP_ZSTAT_ACTIVE); + inactive = mem_cgroup_get_all_zonestat(mem, MEM_CGROUP_ZSTAT_INACTIVE); + return (long) (active / (inactive + 1)); +} unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, struct list_head *dst, |