From 58ae83db2a40dea15d4277d499a11dadc823c388 Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Thu, 7 Feb 2008 00:14:32 -0800 Subject: per-zone and reclaim enhancements for memory controller: calculate mapper_ratio per cgroup Define function for calculating mapped_ratio in memory cgroup. Signed-off-by: KAMEZAWA Hiroyuki Cc: "Eric W. Biederman" Cc: Balbir Singh Cc: David Rientjes Cc: Herbert Poetzl Cc: Kirill Korotaev Cc: Nick Piggin Cc: Paul Menage Cc: Pavel Emelianov Cc: Peter Zijlstra Cc: Vaidyanathan Srinivasan Cc: Rik van Riel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memcontrol.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'mm/memcontrol.c') 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, -- cgit v1.2.3