mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2025-01-03 19:55:31 +00:00
mm/slab: move memcg related functions from slab.h to slub.c
We don't share those between SLAB and SLUB anymore, so most memcg related functions can be moved to slub.c proper. Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: David Rientjes <rientjes@google.com> Tested-by: David Rientjes <rientjes@google.com> Reviewed-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Vlastimil Babka
parent
6011be5991
commit
0bedcc66d2
206
mm/slab.h
206
mm/slab.h
@ -486,12 +486,6 @@ void slabinfo_show_stats(struct seq_file *m, struct kmem_cache *s);
|
||||
ssize_t slabinfo_write(struct file *file, const char __user *buffer,
|
||||
size_t count, loff_t *ppos);
|
||||
|
||||
static inline enum node_stat_item cache_vmstat_idx(struct kmem_cache *s)
|
||||
{
|
||||
return (s->flags & SLAB_RECLAIM_ACCOUNT) ?
|
||||
NR_SLAB_RECLAIMABLE_B : NR_SLAB_UNRECLAIMABLE_B;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SLUB_DEBUG
|
||||
#ifdef CONFIG_SLUB_DEBUG_ON
|
||||
DECLARE_STATIC_KEY_TRUE(slub_debug_enabled);
|
||||
@ -551,220 +545,20 @@ int memcg_alloc_slab_cgroups(struct slab *slab, struct kmem_cache *s,
|
||||
gfp_t gfp, bool new_slab);
|
||||
void mod_objcg_state(struct obj_cgroup *objcg, struct pglist_data *pgdat,
|
||||
enum node_stat_item idx, int nr);
|
||||
|
||||
static inline void memcg_free_slab_cgroups(struct slab *slab)
|
||||
{
|
||||
kfree(slab_objcgs(slab));
|
||||
slab->memcg_data = 0;
|
||||
}
|
||||
|
||||
static inline size_t obj_full_size(struct kmem_cache *s)
|
||||
{
|
||||
/*
|
||||
* For each accounted object there is an extra space which is used
|
||||
* to store obj_cgroup membership. Charge it too.
|
||||
*/
|
||||
return s->size + sizeof(struct obj_cgroup *);
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns false if the allocation should fail.
|
||||
*/
|
||||
static inline bool memcg_slab_pre_alloc_hook(struct kmem_cache *s,
|
||||
struct list_lru *lru,
|
||||
struct obj_cgroup **objcgp,
|
||||
size_t objects, gfp_t flags)
|
||||
{
|
||||
struct obj_cgroup *objcg;
|
||||
|
||||
if (!memcg_kmem_online())
|
||||
return true;
|
||||
|
||||
if (!(flags & __GFP_ACCOUNT) && !(s->flags & SLAB_ACCOUNT))
|
||||
return true;
|
||||
|
||||
/*
|
||||
* The obtained objcg pointer is safe to use within the current scope,
|
||||
* defined by current task or set_active_memcg() pair.
|
||||
* obj_cgroup_get() is used to get a permanent reference.
|
||||
*/
|
||||
objcg = current_obj_cgroup();
|
||||
if (!objcg)
|
||||
return true;
|
||||
|
||||
if (lru) {
|
||||
int ret;
|
||||
struct mem_cgroup *memcg;
|
||||
|
||||
memcg = get_mem_cgroup_from_objcg(objcg);
|
||||
ret = memcg_list_lru_alloc(memcg, lru, flags);
|
||||
css_put(&memcg->css);
|
||||
|
||||
if (ret)
|
||||
return false;
|
||||
}
|
||||
|
||||
if (obj_cgroup_charge(objcg, flags, objects * obj_full_size(s)))
|
||||
return false;
|
||||
|
||||
*objcgp = objcg;
|
||||
return true;
|
||||
}
|
||||
|
||||
static inline void memcg_slab_post_alloc_hook(struct kmem_cache *s,
|
||||
struct obj_cgroup *objcg,
|
||||
gfp_t flags, size_t size,
|
||||
void **p)
|
||||
{
|
||||
struct slab *slab;
|
||||
unsigned long off;
|
||||
size_t i;
|
||||
|
||||
if (!memcg_kmem_online() || !objcg)
|
||||
return;
|
||||
|
||||
for (i = 0; i < size; i++) {
|
||||
if (likely(p[i])) {
|
||||
slab = virt_to_slab(p[i]);
|
||||
|
||||
if (!slab_objcgs(slab) &&
|
||||
memcg_alloc_slab_cgroups(slab, s, flags,
|
||||
false)) {
|
||||
obj_cgroup_uncharge(objcg, obj_full_size(s));
|
||||
continue;
|
||||
}
|
||||
|
||||
off = obj_to_index(s, slab, p[i]);
|
||||
obj_cgroup_get(objcg);
|
||||
slab_objcgs(slab)[off] = objcg;
|
||||
mod_objcg_state(objcg, slab_pgdat(slab),
|
||||
cache_vmstat_idx(s), obj_full_size(s));
|
||||
} else {
|
||||
obj_cgroup_uncharge(objcg, obj_full_size(s));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static inline void memcg_slab_free_hook(struct kmem_cache *s, struct slab *slab,
|
||||
void **p, int objects)
|
||||
{
|
||||
struct obj_cgroup **objcgs;
|
||||
int i;
|
||||
|
||||
if (!memcg_kmem_online())
|
||||
return;
|
||||
|
||||
objcgs = slab_objcgs(slab);
|
||||
if (!objcgs)
|
||||
return;
|
||||
|
||||
for (i = 0; i < objects; i++) {
|
||||
struct obj_cgroup *objcg;
|
||||
unsigned int off;
|
||||
|
||||
off = obj_to_index(s, slab, p[i]);
|
||||
objcg = objcgs[off];
|
||||
if (!objcg)
|
||||
continue;
|
||||
|
||||
objcgs[off] = NULL;
|
||||
obj_cgroup_uncharge(objcg, obj_full_size(s));
|
||||
mod_objcg_state(objcg, slab_pgdat(slab), cache_vmstat_idx(s),
|
||||
-obj_full_size(s));
|
||||
obj_cgroup_put(objcg);
|
||||
}
|
||||
}
|
||||
|
||||
#else /* CONFIG_MEMCG_KMEM */
|
||||
static inline struct obj_cgroup **slab_objcgs(struct slab *slab)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline struct mem_cgroup *memcg_from_slab_obj(void *ptr)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline int memcg_alloc_slab_cgroups(struct slab *slab,
|
||||
struct kmem_cache *s, gfp_t gfp,
|
||||
bool new_slab)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void memcg_free_slab_cgroups(struct slab *slab)
|
||||
{
|
||||
}
|
||||
|
||||
static inline bool memcg_slab_pre_alloc_hook(struct kmem_cache *s,
|
||||
struct list_lru *lru,
|
||||
struct obj_cgroup **objcgp,
|
||||
size_t objects, gfp_t flags)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
static inline void memcg_slab_post_alloc_hook(struct kmem_cache *s,
|
||||
struct obj_cgroup *objcg,
|
||||
gfp_t flags, size_t size,
|
||||
void **p)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void memcg_slab_free_hook(struct kmem_cache *s, struct slab *slab,
|
||||
void **p, int objects)
|
||||
{
|
||||
}
|
||||
#endif /* CONFIG_MEMCG_KMEM */
|
||||
|
||||
static inline struct kmem_cache *virt_to_cache(const void *obj)
|
||||
{
|
||||
struct slab *slab;
|
||||
|
||||
slab = virt_to_slab(obj);
|
||||
if (WARN_ONCE(!slab, "%s: Object is not a Slab page!\n",
|
||||
__func__))
|
||||
return NULL;
|
||||
return slab->slab_cache;
|
||||
}
|
||||
|
||||
static __always_inline void account_slab(struct slab *slab, int order,
|
||||
struct kmem_cache *s, gfp_t gfp)
|
||||
{
|
||||
if (memcg_kmem_online() && (s->flags & SLAB_ACCOUNT))
|
||||
memcg_alloc_slab_cgroups(slab, s, gfp, true);
|
||||
|
||||
mod_node_page_state(slab_pgdat(slab), cache_vmstat_idx(s),
|
||||
PAGE_SIZE << order);
|
||||
}
|
||||
|
||||
static __always_inline void unaccount_slab(struct slab *slab, int order,
|
||||
struct kmem_cache *s)
|
||||
{
|
||||
if (memcg_kmem_online())
|
||||
memcg_free_slab_cgroups(slab);
|
||||
|
||||
mod_node_page_state(slab_pgdat(slab), cache_vmstat_idx(s),
|
||||
-(PAGE_SIZE << order));
|
||||
}
|
||||
|
||||
static inline struct kmem_cache *cache_from_obj(struct kmem_cache *s, void *x)
|
||||
{
|
||||
struct kmem_cache *cachep;
|
||||
|
||||
if (!IS_ENABLED(CONFIG_SLAB_FREELIST_HARDENED) &&
|
||||
!kmem_cache_debug_flags(s, SLAB_CONSISTENCY_CHECKS))
|
||||
return s;
|
||||
|
||||
cachep = virt_to_cache(x);
|
||||
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);
|
||||
return cachep;
|
||||
}
|
||||
|
||||
void free_large_kmalloc(struct folio *folio, void *object);
|
||||
|
||||
size_t __ksize(const void *objp);
|
||||
|
||||
205
mm/slub.c
205
mm/slub.c
@ -1814,6 +1814,165 @@ static bool freelist_corrupted(struct kmem_cache *s, struct slab *slab,
|
||||
#endif
|
||||
#endif /* CONFIG_SLUB_DEBUG */
|
||||
|
||||
static inline enum node_stat_item cache_vmstat_idx(struct kmem_cache *s)
|
||||
{
|
||||
return (s->flags & SLAB_RECLAIM_ACCOUNT) ?
|
||||
NR_SLAB_RECLAIMABLE_B : NR_SLAB_UNRECLAIMABLE_B;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_MEMCG_KMEM
|
||||
static inline void memcg_free_slab_cgroups(struct slab *slab)
|
||||
{
|
||||
kfree(slab_objcgs(slab));
|
||||
slab->memcg_data = 0;
|
||||
}
|
||||
|
||||
static inline size_t obj_full_size(struct kmem_cache *s)
|
||||
{
|
||||
/*
|
||||
* For each accounted object there is an extra space which is used
|
||||
* to store obj_cgroup membership. Charge it too.
|
||||
*/
|
||||
return s->size + sizeof(struct obj_cgroup *);
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns false if the allocation should fail.
|
||||
*/
|
||||
static inline bool memcg_slab_pre_alloc_hook(struct kmem_cache *s,
|
||||
struct list_lru *lru,
|
||||
struct obj_cgroup **objcgp,
|
||||
size_t objects, gfp_t flags)
|
||||
{
|
||||
struct obj_cgroup *objcg;
|
||||
|
||||
if (!memcg_kmem_online())
|
||||
return true;
|
||||
|
||||
if (!(flags & __GFP_ACCOUNT) && !(s->flags & SLAB_ACCOUNT))
|
||||
return true;
|
||||
|
||||
/*
|
||||
* The obtained objcg pointer is safe to use within the current scope,
|
||||
* defined by current task or set_active_memcg() pair.
|
||||
* obj_cgroup_get() is used to get a permanent reference.
|
||||
*/
|
||||
objcg = current_obj_cgroup();
|
||||
if (!objcg)
|
||||
return true;
|
||||
|
||||
if (lru) {
|
||||
int ret;
|
||||
struct mem_cgroup *memcg;
|
||||
|
||||
memcg = get_mem_cgroup_from_objcg(objcg);
|
||||
ret = memcg_list_lru_alloc(memcg, lru, flags);
|
||||
css_put(&memcg->css);
|
||||
|
||||
if (ret)
|
||||
return false;
|
||||
}
|
||||
|
||||
if (obj_cgroup_charge(objcg, flags, objects * obj_full_size(s)))
|
||||
return false;
|
||||
|
||||
*objcgp = objcg;
|
||||
return true;
|
||||
}
|
||||
|
||||
static inline void memcg_slab_post_alloc_hook(struct kmem_cache *s,
|
||||
struct obj_cgroup *objcg,
|
||||
gfp_t flags, size_t size,
|
||||
void **p)
|
||||
{
|
||||
struct slab *slab;
|
||||
unsigned long off;
|
||||
size_t i;
|
||||
|
||||
if (!memcg_kmem_online() || !objcg)
|
||||
return;
|
||||
|
||||
for (i = 0; i < size; i++) {
|
||||
if (likely(p[i])) {
|
||||
slab = virt_to_slab(p[i]);
|
||||
|
||||
if (!slab_objcgs(slab) &&
|
||||
memcg_alloc_slab_cgroups(slab, s, flags, false)) {
|
||||
obj_cgroup_uncharge(objcg, obj_full_size(s));
|
||||
continue;
|
||||
}
|
||||
|
||||
off = obj_to_index(s, slab, p[i]);
|
||||
obj_cgroup_get(objcg);
|
||||
slab_objcgs(slab)[off] = objcg;
|
||||
mod_objcg_state(objcg, slab_pgdat(slab),
|
||||
cache_vmstat_idx(s), obj_full_size(s));
|
||||
} else {
|
||||
obj_cgroup_uncharge(objcg, obj_full_size(s));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static inline void memcg_slab_free_hook(struct kmem_cache *s, struct slab *slab,
|
||||
void **p, int objects)
|
||||
{
|
||||
struct obj_cgroup **objcgs;
|
||||
int i;
|
||||
|
||||
if (!memcg_kmem_online())
|
||||
return;
|
||||
|
||||
objcgs = slab_objcgs(slab);
|
||||
if (!objcgs)
|
||||
return;
|
||||
|
||||
for (i = 0; i < objects; i++) {
|
||||
struct obj_cgroup *objcg;
|
||||
unsigned int off;
|
||||
|
||||
off = obj_to_index(s, slab, p[i]);
|
||||
objcg = objcgs[off];
|
||||
if (!objcg)
|
||||
continue;
|
||||
|
||||
objcgs[off] = NULL;
|
||||
obj_cgroup_uncharge(objcg, obj_full_size(s));
|
||||
mod_objcg_state(objcg, slab_pgdat(slab), cache_vmstat_idx(s),
|
||||
-obj_full_size(s));
|
||||
obj_cgroup_put(objcg);
|
||||
}
|
||||
}
|
||||
#else /* CONFIG_MEMCG_KMEM */
|
||||
static inline struct mem_cgroup *memcg_from_slab_obj(void *ptr)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline void memcg_free_slab_cgroups(struct slab *slab)
|
||||
{
|
||||
}
|
||||
|
||||
static inline bool memcg_slab_pre_alloc_hook(struct kmem_cache *s,
|
||||
struct list_lru *lru,
|
||||
struct obj_cgroup **objcgp,
|
||||
size_t objects, gfp_t flags)
|
||||
{
|
||||
return true;
|
||||
}
|
||||
|
||||
static inline void memcg_slab_post_alloc_hook(struct kmem_cache *s,
|
||||
struct obj_cgroup *objcg,
|
||||
gfp_t flags, size_t size,
|
||||
void **p)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void memcg_slab_free_hook(struct kmem_cache *s, struct slab *slab,
|
||||
void **p, int objects)
|
||||
{
|
||||
}
|
||||
#endif /* CONFIG_MEMCG_KMEM */
|
||||
|
||||
/*
|
||||
* Hooks for other subsystems that check memory allocations. In a typical
|
||||
* production configuration these hooks all should produce no code at all.
|
||||
@ -2048,6 +2207,26 @@ static inline bool shuffle_freelist(struct kmem_cache *s, struct slab *slab)
|
||||
}
|
||||
#endif /* CONFIG_SLAB_FREELIST_RANDOM */
|
||||
|
||||
static __always_inline void account_slab(struct slab *slab, int order,
|
||||
struct kmem_cache *s, gfp_t gfp)
|
||||
{
|
||||
if (memcg_kmem_online() && (s->flags & SLAB_ACCOUNT))
|
||||
memcg_alloc_slab_cgroups(slab, s, gfp, true);
|
||||
|
||||
mod_node_page_state(slab_pgdat(slab), cache_vmstat_idx(s),
|
||||
PAGE_SIZE << order);
|
||||
}
|
||||
|
||||
static __always_inline void unaccount_slab(struct slab *slab, int order,
|
||||
struct kmem_cache *s)
|
||||
{
|
||||
if (memcg_kmem_online())
|
||||
memcg_free_slab_cgroups(slab);
|
||||
|
||||
mod_node_page_state(slab_pgdat(slab), cache_vmstat_idx(s),
|
||||
-(PAGE_SIZE << order));
|
||||
}
|
||||
|
||||
static struct slab *allocate_slab(struct kmem_cache *s, gfp_t flags, int node)
|
||||
{
|
||||
struct slab *slab;
|
||||
@ -3965,6 +4144,32 @@ void ___cache_free(struct kmem_cache *cache, void *x, unsigned long addr)
|
||||
}
|
||||
#endif
|
||||
|
||||
static inline struct kmem_cache *virt_to_cache(const void *obj)
|
||||
{
|
||||
struct slab *slab;
|
||||
|
||||
slab = virt_to_slab(obj);
|
||||
if (WARN_ONCE(!slab, "%s: Object is not a Slab page!\n", __func__))
|
||||
return NULL;
|
||||
return slab->slab_cache;
|
||||
}
|
||||
|
||||
static inline struct kmem_cache *cache_from_obj(struct kmem_cache *s, void *x)
|
||||
{
|
||||
struct kmem_cache *cachep;
|
||||
|
||||
if (!IS_ENABLED(CONFIG_SLAB_FREELIST_HARDENED) &&
|
||||
!kmem_cache_debug_flags(s, SLAB_CONSISTENCY_CHECKS))
|
||||
return s;
|
||||
|
||||
cachep = virt_to_cache(x);
|
||||
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);
|
||||
return cachep;
|
||||
}
|
||||
|
||||
void __kmem_cache_free(struct kmem_cache *s, void *x, unsigned long caller)
|
||||
{
|
||||
slab_free(s, virt_to_slab(x), x, NULL, &x, 1, caller);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user