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 */
-
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