diff options
| -rw-r--r-- | include/linux/memcontrol.h | 11 | ||||
| -rw-r--r-- | mm/memcontrol.c | 17 |
2 files changed, 27 insertions, 1 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 4ec712967f7c..085cdcd817b0 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -64,6 +64,12 @@ extern int mem_cgroup_prepare_migration(struct page *page); extern void mem_cgroup_end_migration(struct page *page); 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); + + #else /* CONFIG_CGROUP_MEM_CONT */ static inline void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p) @@ -135,7 +141,10 @@ mem_cgroup_page_migration(struct page *page, struct page *newpage) { } - +static inline int mem_cgroup_calc_mapped_ratio(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 1637575d3339..2ef214ed5cf8 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -420,6 +420,23 @@ void mem_cgroup_move_lists(struct page_cgroup *pc, bool active) spin_unlock(&mem->lru_lock); } +/* + * Calculate mapped_ratio under memory controller. This will be used in + * vmscan.c for deteremining we have to reclaim mapped pages. + */ +int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) +{ + long total, rss; + + /* + * usage is recorded in bytes. But, here, we assume the number of + * physical pages can be represented by "long" on any arch. + */ + total = (long) (mem->res.usage >> PAGE_SHIFT) + 1L; + rss = (long)mem_cgroup_read_stat(&mem->stat, MEM_CGROUP_STAT_RSS); + return (int)((rss * 100L) / total); +} + unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, struct list_head *dst, unsigned long *scanned, int order, |