From a18e6e6e150a98b9ce3e9acabeff407e7b6ba0c0 Mon Sep 17 00:00:00 2001
From: Johannes Weiner <hannes@cmpxchg.org>
Date: Thu, 29 Apr 2021 22:56:17 -0700
Subject: [PATCH] mm: memcontrol: privatize memcg_page_state query functions
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There are no users outside of the memory controller itself. The rest
of the kernel cares either about node or lruvec stats.
Link: https://lkml.kernel.org/r/20210209163304.77088-4-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Roman Gushchin <guro@fb.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
include/linux/memcontrol.h | 44 --------------------------------------
mm/memcontrol.c | 32 +++++++++++++++++++++++++++
2 files changed, 32 insertions(+), 44 deletions(-)
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 149dc2fd97a6a..9a02aabd0000e 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -864,39 +864,6 @@ extern bool cgroup_memory_noswap;
void lock_page_memcg(struct page *page);
void unlock_page_memcg(struct page *page);
-/*
- * idx can be of type enum memcg_stat_item or node_stat_item.
- * Keep in sync with memcg_exact_page_state().
- */
-static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx)
-{
- long x = atomic_long_read(&memcg->vmstats[idx]);
-#ifdef CONFIG_SMP
- if (x < 0)
- x = 0;
-#endif
- return x;
-}
-
-/*
- * idx can be of type enum memcg_stat_item or node_stat_item.
- * Keep in sync with memcg_exact_page_state().
- */
-static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg,
- int idx)
-{
- long x = 0;
- int cpu;
-
- for_each_possible_cpu(cpu)
- x += per_cpu(memcg->vmstats_local->stat[idx], cpu);
-#ifdef CONFIG_SMP
- if (x < 0)
- x = 0;
-#endif
- return x;
-}
-
void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val);
/* idx can be of type enum memcg_stat_item or node_stat_item */
@@ -1322,17 +1289,6 @@ static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg)
{
}
-static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx)
-{
- return 0;
-}
-
-static inline unsigned long memcg_page_state_local(struct mem_cgroup *memcg,
- int idx)
-{
- return 0;
-}
-
static inline void __mod_memcg_state(struct mem_cgroup *memcg,
int idx,
int nr)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index b4a73c41312ed..56d1c6e58c3b3 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -789,6 +789,38 @@ void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val)
__this_cpu_write(memcg->vmstats_percpu->stat[idx], x);
}
+/*
+ * idx can be of type enum memcg_stat_item or node_stat_item.
+ * Keep in sync with memcg_exact_page_state().
+ */
+static unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx)
+{
+ long x = atomic_long_read(&memcg->vmstats[idx]);
+#ifdef CONFIG_SMP
+ if (x < 0)
+ x = 0;
+#endif
+ return x;
+}
+
+/*
+ * idx can be of type enum memcg_stat_item or node_stat_item.
+ * Keep in sync with memcg_exact_page_state().
+ */
+static unsigned long memcg_page_state_local(struct mem_cgroup *memcg, int idx)
+{
+ long x = 0;
+ int cpu;
+
+ for_each_possible_cpu(cpu)
+ x += per_cpu(memcg->vmstats_local->stat[idx], cpu);
+#ifdef CONFIG_SMP
+ if (x < 0)
+ x = 0;
+#endif
+ return x;
+}
+
static struct mem_cgroup_per_node *
parent_nodeinfo(struct mem_cgroup_per_node *pn, int nid)
{
--
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