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mm: memcg: gather memcg1-specific fields initialization in memcg1_memcg_init()

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Gather all memcg1-specific struct mem_cgroup's members initialization in a
new memcg1_memcg_init() function, defined in mm/memcontrol-v1.c. 
Obviously, if CONFIG_MEMCG_V1 is not set, there is no need to initialize
these fields, so the function becomes trivial.

Link: https://lkml.kernel.org/r/20240628210317.272856-5-roman.gushchin@linux.dev
Signed-off-by: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Roman Gushchin 2024-06-28 21:03:12 +00:00 committed by Andrew Morton
parent 47d2702b20
commit b5855a26de
3 changed files with 12 additions and 5 deletions
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9
mm/memcontrol-v1.c
View File

@ -1961,6 +1961,15 @@ out_kfree:
return ret;
}
void memcg1_memcg_init(struct mem_cgroup *memcg)
{
INIT_LIST_HEAD(&memcg->oom_notify);
mutex_init(&memcg->thresholds_lock);
spin_lock_init(&memcg->move_lock);
INIT_LIST_HEAD(&memcg->event_list);
spin_lock_init(&memcg->event_list_lock);
}
void memcg1_css_offline(struct mem_cgroup *memcg)
{
struct mem_cgroup_event *event, *tmp;

2
mm/memcontrol-v1.h
View File

@ -71,6 +71,7 @@ int memory_stat_show(struct seq_file *m, void *v);
/* Cgroup v1-specific declarations */
#ifdef CONFIG_MEMCG_V1
void memcg1_memcg_init(struct mem_cgroup *memcg);
void memcg1_remove_from_trees(struct mem_cgroup *memcg);
static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg)
@ -119,6 +120,7 @@ extern struct cftype mem_cgroup_legacy_files[];
#else /* CONFIG_MEMCG_V1 */
static inline void memcg1_memcg_init(struct mem_cgroup *memcg) {}
static inline void memcg1_remove_from_trees(struct mem_cgroup *memcg) {}
static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg) {}
static inline bool memcg1_wait_acct_move(struct mem_cgroup *memcg) { return false; }

6
mm/memcontrol.c
View File

@ -3589,13 +3589,9 @@ static struct mem_cgroup *mem_cgroup_alloc(struct mem_cgroup *parent)
goto fail;
INIT_WORK(&memcg->high_work, high_work_func);
INIT_LIST_HEAD(&memcg->oom_notify);
mutex_init(&memcg->thresholds_lock);
spin_lock_init(&memcg->move_lock);
vmpressure_init(&memcg->vmpressure);
INIT_LIST_HEAD(&memcg->event_list);
spin_lock_init(&memcg->event_list_lock);
memcg->socket_pressure = jiffies;
memcg1_memcg_init(memcg);
#ifdef CONFIG_MEMCG_KMEM
memcg->kmemcg_id = -1;
INIT_LIST_HEAD(&memcg->objcg_list);