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Date: Thu, 26 Apr 2012 11:54:19 +0400
From: Konstantin Khlebnikov <khlebnikov@...nvz.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [PATCH 08/12] mm/vmscan: push lruvec pointer into
inactive_list_is_low()
This patch switches mem_cgroup_inactive_anon_is_low() to lruvec pointers,
mem_cgroup_get_lruvec_size() is more effective than mem_cgroup_zone_nr_lru_pages()
Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org>
---
include/linux/memcontrol.h | 10 ++++------
mm/memcontrol.c | 20 ++++++--------------
mm/vmscan.c | 40 ++++++++++++++++++++++------------------
3 files changed, 32 insertions(+), 38 deletions(-)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 7980187..88877a9 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -117,10 +117,8 @@ void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
/*
* For memory reclaim.
*/
-int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg,
- struct zone *zone);
-int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg,
- struct zone *zone);
+int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec);
+int mem_cgroup_inactive_file_is_low(struct lruvec *lruvec);
int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
unsigned long mem_cgroup_get_lruvec_size(struct lruvec *lruvec, enum lru_list);
struct zone_reclaim_stat*
@@ -329,13 +327,13 @@ static inline bool mem_cgroup_disabled(void)
}
static inline int
-mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
+mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
{
return 1;
}
static inline int
-mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone)
+mem_cgroup_inactive_file_is_low(struct lruvec *lruvec)
{
return 1;
}
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2cb6f4d..07c15dd 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1208,19 +1208,15 @@ int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg)
return ret;
}
-int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
+int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
{
unsigned long inactive_ratio;
- int nid = zone_to_nid(zone);
- int zid = zone_idx(zone);
unsigned long inactive;
unsigned long active;
unsigned long gb;
- inactive = mem_cgroup_zone_nr_lru_pages(memcg, nid, zid,
- BIT(LRU_INACTIVE_ANON));
- active = mem_cgroup_zone_nr_lru_pages(memcg, nid, zid,
- BIT(LRU_ACTIVE_ANON));
+ inactive = mem_cgroup_get_lruvec_size(lruvec, LRU_INACTIVE_ANON);
+ active = mem_cgroup_get_lruvec_size(lruvec, LRU_ACTIVE_ANON);
gb = (inactive + active) >> (30 - PAGE_SHIFT);
if (gb)
@@ -1231,17 +1227,13 @@ int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
return inactive * inactive_ratio < active;
}
-int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone)
+int mem_cgroup_inactive_file_is_low(struct lruvec *lruvec)
{
unsigned long active;
unsigned long inactive;
- int zid = zone_idx(zone);
- int nid = zone_to_nid(zone);
- inactive = mem_cgroup_zone_nr_lru_pages(memcg, nid, zid,
- BIT(LRU_INACTIVE_FILE));
- active = mem_cgroup_zone_nr_lru_pages(memcg, nid, zid,
- BIT(LRU_ACTIVE_FILE));
+ inactive = mem_cgroup_get_lruvec_size(lruvec, LRU_INACTIVE_FILE);
+ active = mem_cgroup_get_lruvec_size(lruvec, LRU_ACTIVE_FILE);
return (active > inactive);
}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 6d46117..c055d6e 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1530,13 +1530,12 @@ static int inactive_anon_is_low_global(struct zone *zone)
/**
* inactive_anon_is_low - check if anonymous pages need to be deactivated
- * @zone: zone to check
- * @sc: scan control of this context
+ * @lruvec: LRU vector to check
*
* Returns true if the zone does not have enough inactive anon pages,
* meaning some active anon pages need to be deactivated.
*/
-static int inactive_anon_is_low(struct mem_cgroup_zone *mz)
+static int inactive_anon_is_low(struct lruvec *lruvec)
{
/*
* If we don't have swap space, anonymous page deactivation
@@ -1546,13 +1545,12 @@ static int inactive_anon_is_low(struct mem_cgroup_zone *mz)
return 0;
if (!mem_cgroup_disabled())
- return mem_cgroup_inactive_anon_is_low(mz->mem_cgroup,
- mz->zone);
+ return mem_cgroup_inactive_anon_is_low(lruvec);
- return inactive_anon_is_low_global(mz->zone);
+ return inactive_anon_is_low_global(lruvec_zone(lruvec));
}
#else
-static inline int inactive_anon_is_low(struct mem_cgroup_zone *mz)
+static inline int inactive_anon_is_low(struct lruvec *lruvec)
{
return 0;
}
@@ -1570,7 +1568,7 @@ static int inactive_file_is_low_global(struct zone *zone)
/**
* inactive_file_is_low - check if file pages need to be deactivated
- * @mz: memory cgroup and zone to check
+ * @lruvec: LRU vector to check
*
* When the system is doing streaming IO, memory pressure here
* ensures that active file pages get deactivated, until more
@@ -1582,21 +1580,20 @@ static int inactive_file_is_low_global(struct zone *zone)
* This uses a different ratio than the anonymous pages, because
* the page cache uses a use-once replacement algorithm.
*/
-static int inactive_file_is_low(struct mem_cgroup_zone *mz)
+static int inactive_file_is_low(struct lruvec *lruvec)
{
if (!mem_cgroup_disabled())
- return mem_cgroup_inactive_file_is_low(mz->mem_cgroup,
- mz->zone);
+ return mem_cgroup_inactive_file_is_low(lruvec);
- return inactive_file_is_low_global(mz->zone);
+ return inactive_file_is_low_global(lruvec_zone(lruvec));
}
-static int inactive_list_is_low(struct mem_cgroup_zone *mz, int file)
+static int inactive_list_is_low(struct lruvec *lruvec, int file)
{
if (file)
- return inactive_file_is_low(mz);
+ return inactive_file_is_low(lruvec);
else
- return inactive_anon_is_low(mz);
+ return inactive_anon_is_low(lruvec);
}
static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
@@ -1606,7 +1603,10 @@ static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan,
int file = is_file_lru(lru);
if (is_active_lru(lru)) {
- if (inactive_list_is_low(mz, file))
+ struct lruvec *lruvec = mem_cgroup_zone_lruvec(mz->zone,
+ mz->mem_cgroup);
+
+ if (inactive_list_is_low(lruvec, file))
shrink_active_list(nr_to_scan, mz, sc, lru);
return 0;
}
@@ -1835,6 +1835,9 @@ static void shrink_mem_cgroup_zone(struct mem_cgroup_zone *mz,
unsigned long nr_reclaimed, nr_scanned;
unsigned long nr_to_reclaim = sc->nr_to_reclaim;
struct blk_plug plug;
+ struct lruvec *lruvec;
+
+ lruvec = mem_cgroup_zone_lruvec(mz->zone, mz->mem_cgroup);
restart:
nr_reclaimed = 0;
@@ -1873,7 +1876,7 @@ restart:
* Even if we did not try to evict anon pages at all, we want to
* rebalance the anon lru active/inactive ratio.
*/
- if (inactive_anon_is_low(mz))
+ if (inactive_anon_is_low(lruvec))
shrink_active_list(SWAP_CLUSTER_MAX, mz,
sc, LRU_ACTIVE_ANON);
@@ -2306,12 +2309,13 @@ static void age_active_anon(struct zone *zone, struct scan_control *sc)
memcg = mem_cgroup_iter(NULL, NULL, NULL);
do {
+ struct lruvec *lruvec = mem_cgroup_zone_lruvec(zone, memcg);
struct mem_cgroup_zone mz = {
.mem_cgroup = memcg,
.zone = zone,
};
- if (inactive_anon_is_low(&mz))
+ if (inactive_anon_is_low(lruvec))
shrink_active_list(SWAP_CLUSTER_MAX, &mz,
sc, LRU_ACTIVE_ANON);
--
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