diff options
Diffstat (limited to 'mm/slab.h')
| -rw-r--r-- | mm/slab.h | 48 |
1 files changed, 38 insertions, 10 deletions
diff --git a/mm/slab.h b/mm/slab.h index b8d7ed42cca8..ad15f624a6b5 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -8,9 +8,24 @@ /* Reuses the bits in struct page */ struct slab { unsigned long __page_flags; + +#if defined(CONFIG_SLAB) + union { struct list_head slab_list; - struct { /* Partial pages */ + struct rcu_head rcu_head; + }; + struct kmem_cache *slab_cache; + void *freelist; /* array of free object indexes */ + void *s_mem; /* first object */ + unsigned int active; + +#elif defined(CONFIG_SLUB) + + union { + struct list_head slab_list; + struct rcu_head rcu_head; + struct { struct slab *next; #ifdef CONFIG_64BIT int slabs; /* Nr of slabs left */ @@ -18,25 +33,32 @@ struct slab { short int slabs; #endif }; - struct rcu_head rcu_head; }; - struct kmem_cache *slab_cache; /* not slob */ + struct kmem_cache *slab_cache; /* Double-word boundary */ void *freelist; /* first free object */ union { - void *s_mem; /* slab: first object */ - unsigned long counters; /* SLUB */ - struct { /* SLUB */ + unsigned long counters; + struct { unsigned inuse:16; unsigned objects:15; unsigned frozen:1; }; }; + unsigned int __unused; + +#elif defined(CONFIG_SLOB) + + struct list_head slab_list; + void *__unused_1; + void *freelist; /* first free block */ + void *__unused_2; + int units; + +#else +#error "Unexpected slab allocator configured" +#endif - union { - unsigned int active; /* SLAB */ - int units; /* SLOB */ - }; atomic_t __page_refcount; #ifdef CONFIG_MEMCG unsigned long memcg_data; @@ -48,10 +70,14 @@ struct slab { SLAB_MATCH(flags, __page_flags); SLAB_MATCH(compound_head, slab_list); /* Ensure bit 0 is clear */ SLAB_MATCH(slab_list, slab_list); +#ifndef CONFIG_SLOB SLAB_MATCH(rcu_head, rcu_head); SLAB_MATCH(slab_cache, slab_cache); +#endif +#ifdef CONFIG_SLAB SLAB_MATCH(s_mem, s_mem); SLAB_MATCH(active, active); +#endif SLAB_MATCH(_refcount, __page_refcount); #ifdef CONFIG_MEMCG SLAB_MATCH(memcg_data, memcg_data); @@ -599,6 +625,7 @@ static inline void memcg_slab_free_hook(struct kmem_cache *s, } #endif /* CONFIG_MEMCG_KMEM */ +#ifndef CONFIG_SLOB static inline struct kmem_cache *virt_to_cache(const void *obj) { struct slab *slab; @@ -645,6 +672,7 @@ static inline struct kmem_cache *cache_from_obj(struct kmem_cache *s, void *x) print_tracking(cachep, x); return cachep; } +#endif /* CONFIG_SLOB */ static inline size_t slab_ksize(const struct kmem_cache *s) { |