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authorJohannes Weiner <hannes@cmpxchg.org>2016-01-21 02:02:32 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-21 04:09:18 +0300
commit127424c86bb6cb87f0b563d9fdcfbbaf3c86ecec (patch)
tree7748cabc717161032e479be17e20f5046c9a8335 /mm/memcontrol.c
parent3893e302f6a377c4ef0f077f190bf760bf84e0be (diff)
downloadlinux-127424c86bb6cb87f0b563d9fdcfbbaf3c86ecec.tar.xz
mm: memcontrol: move kmem accounting code to CONFIG_MEMCG
The cgroup2 memory controller will account important in-kernel memory consumers per default. Move all necessary components to CONFIG_MEMCG. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Vladimir Davydov <vdavydov@virtuozzo.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c69
1 files changed, 41 insertions, 28 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 7f8219b58e0c..fe51d5e61389 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -297,7 +297,7 @@ static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id)
return mem_cgroup_from_css(css);
}
-#ifdef CONFIG_MEMCG_KMEM
+#ifndef CONFIG_SLOB
/*
* This will be the memcg's index in each cache's ->memcg_params.memcg_caches.
* The main reason for not using cgroup id for this:
@@ -349,7 +349,7 @@ void memcg_put_cache_ids(void)
DEFINE_STATIC_KEY_FALSE(memcg_kmem_enabled_key);
EXPORT_SYMBOL(memcg_kmem_enabled_key);
-#endif /* CONFIG_MEMCG_KMEM */
+#endif /* !CONFIG_SLOB */
static struct mem_cgroup_per_zone *
mem_cgroup_zone_zoneinfo(struct mem_cgroup *memcg, struct zone *zone)
@@ -2203,7 +2203,7 @@ static void commit_charge(struct page *page, struct mem_cgroup *memcg,
unlock_page_lru(page, isolated);
}
-#ifdef CONFIG_MEMCG_KMEM
+#ifndef CONFIG_SLOB
static int memcg_alloc_cache_id(void)
{
int id, size;
@@ -2424,7 +2424,7 @@ void __memcg_kmem_uncharge(struct page *page, int order)
page->mem_cgroup = NULL;
css_put_many(&memcg->css, nr_pages);
}
-#endif /* CONFIG_MEMCG_KMEM */
+#endif /* !CONFIG_SLOB */
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
@@ -2860,7 +2860,7 @@ static u64 mem_cgroup_read_u64(struct cgroup_subsys_state *css,
}
}
-#ifdef CONFIG_MEMCG_KMEM
+#ifndef CONFIG_SLOB
static int memcg_online_kmem(struct mem_cgroup *memcg)
{
int err = 0;
@@ -2908,24 +2908,6 @@ out:
return err;
}
-static int memcg_update_kmem_limit(struct mem_cgroup *memcg,
- unsigned long limit)
-{
- int ret;
-
- mutex_lock(&memcg_limit_mutex);
- /* Top-level cgroup doesn't propagate from root */
- if (!memcg_kmem_online(memcg)) {
- ret = memcg_online_kmem(memcg);
- if (ret)
- goto out;
- }
- ret = page_counter_limit(&memcg->kmem, limit);
-out:
- mutex_unlock(&memcg_limit_mutex);
- return ret;
-}
-
static int memcg_propagate_kmem(struct mem_cgroup *memcg)
{
int ret = 0;
@@ -3000,16 +2982,45 @@ static void memcg_free_kmem(struct mem_cgroup *memcg)
}
}
#else
+static int memcg_propagate_kmem(struct mem_cgroup *memcg)
+{
+ return 0;
+}
+static void memcg_offline_kmem(struct mem_cgroup *memcg)
+{
+}
+static void memcg_free_kmem(struct mem_cgroup *memcg)
+{
+}
+#endif /* !CONFIG_SLOB */
+
+#ifdef CONFIG_MEMCG_KMEM
static int memcg_update_kmem_limit(struct mem_cgroup *memcg,
unsigned long limit)
{
- return -EINVAL;
+ int ret;
+
+ mutex_lock(&memcg_limit_mutex);
+ /* Top-level cgroup doesn't propagate from root */
+ if (!memcg_kmem_online(memcg)) {
+ ret = memcg_online_kmem(memcg);
+ if (ret)
+ goto out;
+ }
+ ret = page_counter_limit(&memcg->kmem, limit);
+out:
+ mutex_unlock(&memcg_limit_mutex);
+ return ret;
}
-static void memcg_offline_kmem(struct mem_cgroup *memcg)
+#else
+static int memcg_update_kmem_limit(struct mem_cgroup *memcg,
+ unsigned long limit)
{
+ return -EINVAL;
}
#endif /* CONFIG_MEMCG_KMEM */
+
/*
* The user of this function is...
* RES_LIMIT.
@@ -4182,7 +4193,7 @@ mem_cgroup_css_alloc(struct cgroup_subsys_state *parent_css)
vmpressure_init(&memcg->vmpressure);
INIT_LIST_HEAD(&memcg->event_list);
spin_lock_init(&memcg->event_list_lock);
-#ifdef CONFIG_MEMCG_KMEM
+#ifndef CONFIG_SLOB
memcg->kmemcg_id = -1;
#endif
#ifdef CONFIG_CGROUP_WRITEBACK
@@ -4244,10 +4255,11 @@ mem_cgroup_css_online(struct cgroup_subsys_state *css)
}
mutex_unlock(&memcg_create_mutex);
-#ifdef CONFIG_MEMCG_KMEM
ret = memcg_propagate_kmem(memcg);
if (ret)
return ret;
+
+#ifdef CONFIG_MEMCG_KMEM
ret = tcp_init_cgroup(memcg);
if (ret)
return ret;
@@ -4308,8 +4320,9 @@ static void mem_cgroup_css_free(struct cgroup_subsys_state *css)
static_branch_dec(&memcg_sockets_enabled_key);
#endif
-#ifdef CONFIG_MEMCG_KMEM
memcg_free_kmem(memcg);
+
+#ifdef CONFIG_MEMCG_KMEM
tcp_destroy_cgroup(memcg);
#endif