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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>
This commit is contained in:
Johannes Weiner 2021-04-29 22:56:17 -07:00 committed by Linus Torvalds
parent a3747b53b1
commit a18e6e6e15
2 changed files with 32 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
include/linux/memcontrol.h
View File

@ -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)

32
mm/memcontrol.c
View File

@ -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)
{