calculate active/inactive imbalance per memory cgroup. Changelog V1 -> V2: - removed "total" (just count inactive and active) - fixed comment - fixed return type to be "long".
Signed-off-by: KAMEZAWA Hiroyuki <[EMAIL PROTECTED]> include/linux/memcontrol.h | 8 ++++++++ mm/memcontrol.c | 14 ++++++++++++++ 2 files changed, 22 insertions(+) Index: linux-2.6.24-rc3-mm1/mm/memcontrol.c =================================================================== --- linux-2.6.24-rc3-mm1.orig/mm/memcontrol.c 2007-11-27 10:44:19.000000000 +0900 +++ linux-2.6.24-rc3-mm1/mm/memcontrol.c 2007-11-27 11:19:51.000000000 +0900 @@ -437,6 +437,20 @@ 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, Index: linux-2.6.24-rc3-mm1/include/linux/memcontrol.h =================================================================== --- linux-2.6.24-rc3-mm1.orig/include/linux/memcontrol.h 2007-11-27 10:44:19.000000000 +0900 +++ linux-2.6.24-rc3-mm1/include/linux/memcontrol.h 2007-11-27 11:19:00.000000000 +0900 @@ -65,6 +65,8 @@ * 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 */ @@ -142,6 +144,12 @@ { return 0; } + +static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem) +{ + return 0; +} + #endif /* CONFIG_CGROUP_MEM_CONT */ #endif /* _LINUX_MEMCONTROL_H */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/