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Subject[PATCH 07/11] memcg: make mem_cgroup_zone_nr_pages()
Date
introduce mem_cgroup_zone_nr_pages().
it is called by zone_nr_pages() helper function.


this patch doesn't have any behavior change.


Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
---
include/linux/memcontrol.h | 11 +++++++++++
mm/memcontrol.c | 12 +++++++++++-
mm/vmscan.c | 3 +++
3 files changed, 25 insertions(+), 1 deletion(-)
Index: b/include/linux/memcontrol.h
===================================================================
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -92,6 +92,9 @@ extern long mem_cgroup_calc_reclaim(stru
int priority, enum lru_list lru);
int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg,
struct zone *zone);
+unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
+ struct zone *zone,
+ enum lru_list lru);

#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
extern int do_swap_account;
@@ -250,6 +253,14 @@ mem_cgroup_inactive_anon_is_low(struct m
return 1;
}

+static inline unsigned long
+mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone,
+ enum lru_list lru)
+{
+ return 0;
+}
+
+
#endif /* CONFIG_CGROUP_MEM_CONT */

#endif /* _LINUX_MEMCONTROL_H */
Index: b/mm/memcontrol.c
===================================================================
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -186,7 +186,6 @@ pcg_default_flags[NR_CHARGE_TYPE] = {
0, /* FORCE */
};

-
/* for encoding cft->private value on file */
#define _MEM (0)
#define _MEMSWAP (1)
@@ -448,6 +447,17 @@ int mem_cgroup_inactive_anon_is_low(stru
return 0;
}

+unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
+ struct zone *zone,
+ enum lru_list lru)
+{
+ int nid = zone->zone_pgdat->node_id;
+ int zid = zone_idx(zone);
+ struct mem_cgroup_per_zone *mz = mem_cgroup_zoneinfo(memcg, nid, zid);
+
+ return MEM_CGROUP_ZSTAT(mz, lru);
+}
+
unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
struct list_head *dst,
unsigned long *scanned, int order,
Index: b/mm/vmscan.c
===================================================================
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -140,6 +140,9 @@ static struct zone_reclaim_stat *get_rec
static unsigned long zone_nr_pages(struct zone *zone, struct scan_control *sc,
enum lru_list lru)
{
+ if (!scan_global_lru(sc))
+ return mem_cgroup_zone_nr_pages(sc->mem_cgroup, zone, lru);
+
return zone_page_state(zone, NR_LRU_BASE + lru);
}




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