struct list_head list; /* List of all slab caches on the system */
};
-#else /* !CONFIG_SLOB */
-
-/*
- * This is the main placeholder for memcg-related information in kmem caches.
- * Both the root cache and the child cache will have it. Some fields are used
- * in both cases, other are specific to root caches.
- *
- * @root_cache: Common to root and child caches. NULL for root, pointer to
- * the root cache for children.
- *
- * The following fields are specific to root caches.
- *
- * @memcg_cache: pointer to memcg kmem cache, used by all non-root memory
- * cgroups.
- * @root_caches_node: list node for slab_root_caches list.
- * @work: work struct used to create the non-root cache.
- */
-struct memcg_cache_params {
- struct kmem_cache *root_cache;
-
- struct kmem_cache *memcg_cache;
- struct list_head __root_caches_node;
- struct work_struct work;
-};
#endif /* CONFIG_SLOB */
#ifdef CONFIG_SLAB
void __kmem_cache_release(struct kmem_cache *);
int __kmem_cache_shrink(struct kmem_cache *);
void slab_kmem_cache_release(struct kmem_cache *);
-void kmem_cache_shrink_all(struct kmem_cache *s);
struct seq_file;
struct file;
}
#ifdef CONFIG_MEMCG_KMEM
-
-/* List of all root caches. */
-extern struct list_head slab_root_caches;
-#define root_caches_node memcg_params.__root_caches_node
-
-static inline bool is_root_cache(struct kmem_cache *s)
-{
- return !s->memcg_params.root_cache;
-}
-
-static inline bool slab_equal_or_root(struct kmem_cache *s,
- struct kmem_cache *p)
-{
- return p == s || p == s->memcg_params.root_cache;
-}
-
-/*
- * We use suffixes to the name in memcg because we can't have caches
- * created in the system with the same name. But when we print them
- * locally, better refer to them with the base name
- */
-static inline const char *cache_name(struct kmem_cache *s)
-{
- if (!is_root_cache(s))
- s = s->memcg_params.root_cache;
- return s->name;
-}
-
-static inline struct kmem_cache *memcg_root_cache(struct kmem_cache *s)
-{
- if (is_root_cache(s))
- return s;
- return s->memcg_params.root_cache;
-}
-
-static inline struct kmem_cache *memcg_cache(struct kmem_cache *s)
-{
- if (is_root_cache(s))
- return s->memcg_params.memcg_cache;
- return NULL;
-}
-
static inline struct obj_cgroup **page_obj_cgroups(struct page *page)
{
/*
return ((unsigned long)page->obj_cgroups & 0x1UL);
}
-static inline int memcg_alloc_page_obj_cgroups(struct page *page,
- struct kmem_cache *s, gfp_t gfp)
-{
- unsigned int objects = objs_per_slab_page(s, page);
- void *vec;
-
- vec = kcalloc_node(objects, sizeof(struct obj_cgroup *), gfp,
- page_to_nid(page));
- if (!vec)
- return -ENOMEM;
-
- kmemleak_not_leak(vec);
- page->obj_cgroups = (struct obj_cgroup **) ((unsigned long)vec | 0x1UL);
- return 0;
-}
+int memcg_alloc_page_obj_cgroups(struct page *page, struct kmem_cache *s,
+ gfp_t gfp);
static inline void memcg_free_page_obj_cgroups(struct page *page)
{
return s->size + sizeof(struct obj_cgroup *);
}
-static inline struct kmem_cache *memcg_slab_pre_alloc_hook(struct kmem_cache *s,
- struct obj_cgroup **objcgp,
- size_t objects, gfp_t flags)
+static inline struct obj_cgroup *memcg_slab_pre_alloc_hook(struct kmem_cache *s,
+ size_t objects,
+ gfp_t flags)
{
- struct kmem_cache *cachep;
struct obj_cgroup *objcg;
if (memcg_kmem_bypass())
- return s;
-
- cachep = READ_ONCE(s->memcg_params.memcg_cache);
- if (unlikely(!cachep)) {
- /*
- * If memcg cache does not exist yet, we schedule it's
- * asynchronous creation and let the current allocation
- * go through with the root cache.
- */
- queue_work(system_wq, &s->memcg_params.work);
- return s;
- }
+ return NULL;
objcg = get_obj_cgroup_from_current();
if (!objcg)
- return s;
+ return NULL;
if (obj_cgroup_charge(objcg, flags, objects * obj_full_size(s))) {
obj_cgroup_put(objcg);
- cachep = NULL;
+ return NULL;
}
- *objcgp = objcg;
- return cachep;
+ return objcg;
}
static inline void mod_objcg_state(struct obj_cgroup *objcg,
static inline void memcg_slab_post_alloc_hook(struct kmem_cache *s,
struct obj_cgroup *objcg,
- size_t size, void **p)
+ gfp_t flags, size_t size,
+ void **p)
{
struct page *page;
unsigned long off;
size_t i;
+ if (!objcg)
+ return;
+
+ flags &= ~__GFP_ACCOUNT;
for (i = 0; i < size; i++) {
if (likely(p[i])) {
page = virt_to_head_page(p[i]);
+
+ if (!page_has_obj_cgroups(page) &&
+ memcg_alloc_page_obj_cgroups(page, s, flags)) {
+ obj_cgroup_uncharge(objcg, obj_full_size(s));
+ continue;
+ }
+
off = obj_to_index(s, page, p[i]);
obj_cgroup_get(objcg);
page_obj_cgroups(page)[off] = objcg;
struct obj_cgroup *objcg;
unsigned int off;
- if (!memcg_kmem_enabled() || is_root_cache(s))
+ if (!memcg_kmem_enabled())
+ return;
+
+ if (!page_has_obj_cgroups(page))
return;
off = obj_to_index(s, page, p);
objcg = page_obj_cgroups(page)[off];
page_obj_cgroups(page)[off] = NULL;
+ if (!objcg)
+ return;
+
obj_cgroup_uncharge(objcg, obj_full_size(s));
mod_objcg_state(objcg, page_pgdat(page), cache_vmstat_idx(s),
-obj_full_size(s));
obj_cgroup_put(objcg);
}
-extern void slab_init_memcg_params(struct kmem_cache *);
-extern void memcg_link_cache(struct kmem_cache *s);
-
#else /* CONFIG_MEMCG_KMEM */
-
-/* If !memcg, all caches are root. */
-#define slab_root_caches slab_caches
-#define root_caches_node list
-
-static inline bool is_root_cache(struct kmem_cache *s)
-{
- return true;
-}
-
-static inline bool slab_equal_or_root(struct kmem_cache *s,
- struct kmem_cache *p)
-{
- return s == p;
-}
-
-static inline const char *cache_name(struct kmem_cache *s)
-{
- return s->name;
-}
-
-static inline struct kmem_cache *memcg_root_cache(struct kmem_cache *s)
-{
- return s;
-}
-
-static inline struct kmem_cache *memcg_cache(struct kmem_cache *s)
-{
- return NULL;
-}
-
static inline bool page_has_obj_cgroups(struct page *page)
{
return false;
{
}
-static inline struct kmem_cache *memcg_slab_pre_alloc_hook(struct kmem_cache *s,
- struct obj_cgroup **objcgp,
- size_t objects, gfp_t flags)
+static inline struct obj_cgroup *memcg_slab_pre_alloc_hook(struct kmem_cache *s,
+ size_t objects,
+ gfp_t flags)
{
return NULL;
}
static inline void memcg_slab_post_alloc_hook(struct kmem_cache *s,
struct obj_cgroup *objcg,
- size_t size, void **p)
+ gfp_t flags, size_t size,
+ void **p)
{
}
void *p)
{
}
-
-static inline void slab_init_memcg_params(struct kmem_cache *s)
-{
-}
-
-static inline void memcg_link_cache(struct kmem_cache *s)
-{
-}
-
#endif /* CONFIG_MEMCG_KMEM */
static inline struct kmem_cache *virt_to_cache(const void *obj)
return page->slab_cache;
}
-static __always_inline int charge_slab_page(struct page *page,
- gfp_t gfp, int order,
- struct kmem_cache *s)
+static __always_inline void account_slab_page(struct page *page, int order,
+ struct kmem_cache *s)
{
- if (memcg_kmem_enabled() && !is_root_cache(s)) {
- int ret;
-
- ret = memcg_alloc_page_obj_cgroups(page, s, gfp);
- if (ret)
- return ret;
- }
-
mod_node_page_state(page_pgdat(page), cache_vmstat_idx(s),
PAGE_SIZE << order);
- return 0;
}
-static __always_inline void uncharge_slab_page(struct page *page, int order,
- struct kmem_cache *s)
+static __always_inline void unaccount_slab_page(struct page *page, int order,
+ struct kmem_cache *s)
{
- if (memcg_kmem_enabled() && !is_root_cache(s))
+ if (memcg_kmem_enabled())
memcg_free_page_obj_cgroups(page);
mod_node_page_state(page_pgdat(page), cache_vmstat_idx(s),
struct kmem_cache *cachep;
if (!IS_ENABLED(CONFIG_SLAB_FREELIST_HARDENED) &&
- !memcg_kmem_enabled() &&
!kmem_cache_debug_flags(s, SLAB_CONSISTENCY_CHECKS))
return s;
cachep = virt_to_cache(x);
- if (WARN(cachep && !slab_equal_or_root(cachep, s),
+ if (WARN(cachep && cachep != s,
"%s: Wrong slab cache. %s but object is from %s\n",
__func__, s->name, cachep->name))
print_tracking(cachep, x);
if (memcg_kmem_enabled() &&
((flags & __GFP_ACCOUNT) || (s->flags & SLAB_ACCOUNT)))
- return memcg_slab_pre_alloc_hook(s, objcgp, size, flags);
+ *objcgp = memcg_slab_pre_alloc_hook(s, size, flags);
return s;
}
s->flags, flags);
}
- if (memcg_kmem_enabled() && !is_root_cache(s))
- memcg_slab_post_alloc_hook(s, objcg, size, p);
+ if (memcg_kmem_enabled())
+ memcg_slab_post_alloc_hook(s, objcg, flags, size, p);
}
#ifndef CONFIG_SLOB
projects / linux-2.6-microblaze.git / blobdiff