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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>
hifive-unleashed-5.1
Johannes Weiner 2016-01-20 15:02:32 -08:00 committed by Linus Torvalds
parent 3893e302f6
commit 127424c86b
11 changed files with 73 additions and 58 deletions
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4
include/linux/list_lru.h
View File

@ -40,7 +40,7 @@ struct list_lru_node {
spinlock_t lock;
/* global list, used for the root cgroup in cgroup aware lrus */
struct list_lru_one lru;
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
/* for cgroup aware lrus points to per cgroup lists, otherwise NULL */
struct list_lru_memcg *memcg_lrus;
#endif
@ -48,7 +48,7 @@ struct list_lru_node {
struct list_lru {
struct list_lru_node *node;
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
struct list_head list;
#endif
};

7
include/linux/memcontrol.h
View File

@ -236,7 +236,7 @@ struct mem_cgroup {
#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET)
struct cg_proto tcp_mem;
#endif
#if defined(CONFIG_MEMCG_KMEM)
#ifndef CONFIG_SLOB
/* Index in the kmem_cache->memcg_params.memcg_caches array */
int kmemcg_id;
enum memcg_kmem_state kmem_state;
@ -735,7 +735,7 @@ static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
}
#endif
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
extern struct static_key_false memcg_kmem_enabled_key;
extern int memcg_nr_cache_ids;
@ -891,5 +891,6 @@ memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
static inline void memcg_kmem_put_cache(struct kmem_cache *cachep)
{
}
#endif /* CONFIG_MEMCG_KMEM */
#endif /* CONFIG_MEMCG && !CONFIG_SLOB */
#endif /* _LINUX_MEMCONTROL_H */

4
include/linux/sched.h
View File

@ -1476,10 +1476,10 @@ struct task_struct {
unsigned in_iowait:1;
#ifdef CONFIG_MEMCG
unsigned memcg_may_oom:1;
#endif
#ifdef CONFIG_MEMCG_KMEM
#ifndef CONFIG_SLOB
unsigned memcg_kmem_skip_account:1;
#endif
#endif
#ifdef CONFIG_COMPAT_BRK
unsigned brk_randomized:1;
#endif

2
include/linux/slab.h
View File

@ -86,7 +86,7 @@
#else
# define SLAB_FAILSLAB 0x00000000UL
#endif
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
# define SLAB_ACCOUNT 0x04000000UL /* Account to memcg */
#else
# define SLAB_ACCOUNT 0x00000000UL

3
include/linux/slab_def.h
View File

@ -69,7 +69,8 @@ struct kmem_cache {
*/
int obj_offset;
#endif /* CONFIG_DEBUG_SLAB */
#ifdef CONFIG_MEMCG_KMEM
#ifdef CONFIG_MEMCG
struct memcg_cache_params memcg_params;
#endif

2
include/linux/slub_def.h
View File

@ -84,7 +84,7 @@ struct kmem_cache {
#ifdef CONFIG_SYSFS
struct kobject kobj; /* For sysfs */
#endif
#ifdef CONFIG_MEMCG_KMEM
#ifdef CONFIG_MEMCG
struct memcg_cache_params memcg_params;
int max_attr_size; /* for propagation, maximum size of a stored attr */
#ifdef CONFIG_SYSFS

12
mm/list_lru.c
View File

@ -12,7 +12,7 @@
#include <linux/mutex.h>
#include <linux/memcontrol.h>
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
static LIST_HEAD(list_lrus);
static DEFINE_MUTEX(list_lrus_mutex);
@ -37,9 +37,9 @@ static void list_lru_register(struct list_lru *lru)
static void list_lru_unregister(struct list_lru *lru)
{
}
#endif /* CONFIG_MEMCG_KMEM */
#endif /* CONFIG_MEMCG && !CONFIG_SLOB */
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
static inline bool list_lru_memcg_aware(struct list_lru *lru)
{
/*
@ -104,7 +104,7 @@ list_lru_from_kmem(struct list_lru_node *nlru, void *ptr)
{
return &nlru->lru;
}
#endif /* CONFIG_MEMCG_KMEM */
#endif /* CONFIG_MEMCG && !CONFIG_SLOB */
bool list_lru_add(struct list_lru *lru, struct list_head *item)
{
@ -292,7 +292,7 @@ static void init_one_lru(struct list_lru_one *l)
l->nr_items = 0;
}
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
static void __memcg_destroy_list_lru_node(struct list_lru_memcg *memcg_lrus,
int begin, int end)
{
@ -529,7 +529,7 @@ static int memcg_init_list_lru(struct list_lru *lru, bool memcg_aware)
static void memcg_destroy_list_lru(struct list_lru *lru)
{
}
#endif /* CONFIG_MEMCG_KMEM */
#endif /* CONFIG_MEMCG && !CONFIG_SLOB */
int __list_lru_init(struct list_lru *lru, bool memcg_aware,
struct lock_class_key *key)

71
mm/memcontrol.c
View File

@ -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)
{
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;
}
#else
static int memcg_update_kmem_limit(struct mem_cgroup *memcg,
unsigned long limit)
{
return -EINVAL;
}
static void memcg_offline_kmem(struct mem_cgroup *memcg)
{
}
#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

6
mm/slab.h
View File

@ -173,7 +173,7 @@ ssize_t slabinfo_write(struct file *file, const char __user *buffer,
void __kmem_cache_free_bulk(struct kmem_cache *, size_t, void **);
int __kmem_cache_alloc_bulk(struct kmem_cache *, gfp_t, size_t, void **);
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
/*
* Iterate over all memcg caches of the given root cache. The caller must hold
* slab_mutex.
@ -251,7 +251,7 @@ static __always_inline int memcg_charge_slab(struct page *page,
extern void slab_init_memcg_params(struct kmem_cache *);
#else /* !CONFIG_MEMCG_KMEM */
#else /* CONFIG_MEMCG && !CONFIG_SLOB */
#define for_each_memcg_cache(iter, root) \
for ((void)(iter), (void)(root); 0; )
@ -292,7 +292,7 @@ static inline int memcg_charge_slab(struct page *page, gfp_t gfp, int order,
static inline void slab_init_memcg_params(struct kmem_cache *s)
{
}
#endif /* CONFIG_MEMCG_KMEM */
#endif /* CONFIG_MEMCG && !CONFIG_SLOB */
static inline struct kmem_cache *cache_from_obj(struct kmem_cache *s, void *x)
{

10
mm/slab_common.c
View File

@ -128,7 +128,7 @@ int __kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t nr,
return i;
}
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
void slab_init_memcg_params(struct kmem_cache *s)
{
s->memcg_params.is_root_cache = true;
@ -221,7 +221,7 @@ static inline int init_memcg_params(struct kmem_cache *s,
static inline void destroy_memcg_params(struct kmem_cache *s)
{
}
#endif /* CONFIG_MEMCG_KMEM */
#endif /* CONFIG_MEMCG && !CONFIG_SLOB */
/*
* Find a mergeable slab cache
@ -477,7 +477,7 @@ static void release_caches(struct list_head *release, bool need_rcu_barrier)
}
}
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
/*
* memcg_create_kmem_cache - Create a cache for a memory cgroup.
* @memcg: The memory cgroup the new cache is for.
@ -689,7 +689,7 @@ static inline int shutdown_memcg_caches(struct kmem_cache *s,
{
return 0;
}
#endif /* CONFIG_MEMCG_KMEM */
#endif /* CONFIG_MEMCG && !CONFIG_SLOB */
void slab_kmem_cache_release(struct kmem_cache *s)
{
@ -1123,7 +1123,7 @@ static int slab_show(struct seq_file *m, void *p)
return 0;
}
#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
int memcg_slab_show(struct seq_file *m, void *p)
{
struct kmem_cache *s = list_entry(p, struct kmem_cache, list);

10
mm/slub.c
View File

@ -5207,7 +5207,7 @@ static ssize_t slab_attr_store(struct kobject *kobj,
return -EIO;
err = attribute->store(s, buf, len);
#ifdef CONFIG_MEMCG_KMEM
#ifdef CONFIG_MEMCG
if (slab_state >= FULL && err >= 0 && is_root_cache(s)) {
struct kmem_cache *c;
@ -5242,7 +5242,7 @@ static ssize_t slab_attr_store(struct kobject *kobj,
static void memcg_propagate_slab_attrs(struct kmem_cache *s)
{
#ifdef CONFIG_MEMCG_KMEM
#ifdef CONFIG_MEMCG
int i;
char *buffer = NULL;
struct kmem_cache *root_cache;
@ -5328,7 +5328,7 @@ static struct kset *slab_kset;
static inline struct kset *cache_kset(struct kmem_cache *s)
{
#ifdef CONFIG_MEMCG_KMEM
#ifdef CONFIG_MEMCG
if (!is_root_cache(s))
return s->memcg_params.root_cache->memcg_kset;
#endif
@ -5405,7 +5405,7 @@ static int sysfs_slab_add(struct kmem_cache *s)
if (err)
goto out_del_kobj;
#ifdef CONFIG_MEMCG_KMEM
#ifdef CONFIG_MEMCG
if (is_root_cache(s)) {
s->memcg_kset = kset_create_and_add("cgroup", NULL, &s->kobj);
if (!s->memcg_kset) {
@ -5438,7 +5438,7 @@ void sysfs_slab_remove(struct kmem_cache *s)
*/
return;
#ifdef CONFIG_MEMCG_KMEM
#ifdef CONFIG_MEMCG
kset_unregister(s->memcg_kset);
#endif
kobject_uevent(&s->kobj, KOBJ_REMOVE);