diff options
Diffstat (limited to 'mm/slab.h')
| -rw-r--r-- | mm/slab.h | 38 |
1 files changed, 9 insertions, 29 deletions
diff --git a/mm/slab.h b/mm/slab.h index 54faf9a623f9..1a756a359fa8 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -239,30 +239,13 @@ static inline bool kmem_cache_debug_flags(struct kmem_cache *s, slab_flags_t fla } #ifdef CONFIG_MEMCG_KMEM -static inline struct obj_cgroup **page_obj_cgroups(struct page *page) -{ - /* - * page->mem_cgroup and page->obj_cgroups are sharing the same - * space. To distinguish between them in case we don't know for sure - * that the page is a slab page (e.g. page_cgroup_ino()), let's - * always set the lowest bit of obj_cgroups. - */ - return (struct obj_cgroup **) - ((unsigned long)page->obj_cgroups & ~0x1UL); -} - -static inline bool page_has_obj_cgroups(struct page *page) -{ - return ((unsigned long)page->obj_cgroups & 0x1UL); -} - 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) { - kfree(page_obj_cgroups(page)); - page->obj_cgroups = NULL; + kfree(page_objcgs(page)); + page->memcg_data = 0; } static inline size_t obj_full_size(struct kmem_cache *s) @@ -333,7 +316,7 @@ static inline void memcg_slab_post_alloc_hook(struct kmem_cache *s, if (likely(p[i])) { page = virt_to_head_page(p[i]); - if (!page_has_obj_cgroups(page) && + if (!page_objcgs(page) && memcg_alloc_page_obj_cgroups(page, s, flags)) { obj_cgroup_uncharge(objcg, obj_full_size(s)); continue; @@ -341,7 +324,7 @@ static inline void memcg_slab_post_alloc_hook(struct kmem_cache *s, off = obj_to_index(s, page, p[i]); obj_cgroup_get(objcg); - page_obj_cgroups(page)[off] = objcg; + page_objcgs(page)[off] = objcg; mod_objcg_state(objcg, page_pgdat(page), cache_vmstat_idx(s), obj_full_size(s)); } else { @@ -355,6 +338,7 @@ static inline void memcg_slab_free_hook(struct kmem_cache *s_orig, void **p, int objects) { struct kmem_cache *s; + struct obj_cgroup **objcgs; struct obj_cgroup *objcg; struct page *page; unsigned int off; @@ -368,7 +352,8 @@ static inline void memcg_slab_free_hook(struct kmem_cache *s_orig, continue; page = virt_to_head_page(p[i]); - if (!page_has_obj_cgroups(page)) + objcgs = page_objcgs(page); + if (!objcgs) continue; if (!s_orig) @@ -377,11 +362,11 @@ static inline void memcg_slab_free_hook(struct kmem_cache *s_orig, s = s_orig; off = obj_to_index(s, page, p[i]); - objcg = page_obj_cgroups(page)[off]; + objcg = objcgs[off]; if (!objcg) continue; - page_obj_cgroups(page)[off] = NULL; + objcgs[off] = NULL; obj_cgroup_uncharge(objcg, obj_full_size(s)); mod_objcg_state(objcg, page_pgdat(page), cache_vmstat_idx(s), -obj_full_size(s)); @@ -390,11 +375,6 @@ static inline void memcg_slab_free_hook(struct kmem_cache *s_orig, } #else /* CONFIG_MEMCG_KMEM */ -static inline bool page_has_obj_cgroups(struct page *page) -{ - return false; -} - static inline struct mem_cgroup *memcg_from_slab_obj(void *ptr) { return NULL; |