1 #ifndef _LINUX_SLUB_DEF_H
2 #define _LINUX_SLUB_DEF_H
5 * SLUB : A Slab allocator without object queues.
7 * (C) 2007 SGI, Christoph Lameter
9 #include <linux/kobject.h>
12 ALLOC_FASTPATH
, /* Allocation from cpu slab */
13 ALLOC_SLOWPATH
, /* Allocation by getting a new cpu slab */
14 FREE_FASTPATH
, /* Free to cpu slab */
15 FREE_SLOWPATH
, /* Freeing not to cpu slab */
16 FREE_FROZEN
, /* Freeing to frozen slab */
17 FREE_ADD_PARTIAL
, /* Freeing moves slab to partial list */
18 FREE_REMOVE_PARTIAL
, /* Freeing removes last object */
19 ALLOC_FROM_PARTIAL
, /* Cpu slab acquired from node partial list */
20 ALLOC_SLAB
, /* Cpu slab acquired from page allocator */
21 ALLOC_REFILL
, /* Refill cpu slab from slab freelist */
22 ALLOC_NODE_MISMATCH
, /* Switching cpu slab */
23 FREE_SLAB
, /* Slab freed to the page allocator */
24 CPUSLAB_FLUSH
, /* Abandoning of the cpu slab */
25 DEACTIVATE_FULL
, /* Cpu slab was full when deactivated */
26 DEACTIVATE_EMPTY
, /* Cpu slab was empty when deactivated */
27 DEACTIVATE_TO_HEAD
, /* Cpu slab was moved to the head of partials */
28 DEACTIVATE_TO_TAIL
, /* Cpu slab was moved to the tail of partials */
29 DEACTIVATE_REMOTE_FREES
,/* Slab contained remotely freed objects */
30 DEACTIVATE_BYPASS
, /* Implicit deactivation */
31 ORDER_FALLBACK
, /* Number of times fallback was necessary */
32 CMPXCHG_DOUBLE_CPU_FAIL
,/* Failure of this_cpu_cmpxchg_double */
33 CMPXCHG_DOUBLE_FAIL
, /* Number of times that cmpxchg double did not match */
34 CPU_PARTIAL_ALLOC
, /* Used cpu partial on alloc */
35 CPU_PARTIAL_FREE
, /* Refill cpu partial on free */
36 CPU_PARTIAL_NODE
, /* Refill cpu partial from node partial */
37 CPU_PARTIAL_DRAIN
, /* Drain cpu partial to node partial */
40 struct kmem_cache_cpu
{
41 void **freelist
; /* Pointer to next available object */
42 unsigned long tid
; /* Globally unique transaction id */
43 struct page
*page
; /* The slab from which we are allocating */
44 struct page
*partial
; /* Partially allocated frozen slabs */
45 #ifdef CONFIG_SLUB_STATS
46 unsigned stat
[NR_SLUB_STAT_ITEMS
];
51 * Word size structure that can be atomically updated or read and that
52 * contains both the order and the number of objects that a slab of the
53 * given order would contain.
55 struct kmem_cache_order_objects
{
60 * Slab cache management.
63 struct kmem_cache_cpu __percpu
*cpu_slab
;
64 /* Used for retriving partial slabs etc */
66 unsigned long min_partial
;
67 int size
; /* The size of an object including meta data */
68 int object_size
; /* The size of an object without meta data */
69 int offset
; /* Free pointer offset. */
70 int cpu_partial
; /* Number of per cpu partial objects to keep around */
71 struct kmem_cache_order_objects oo
;
73 /* Allocation and freeing of slabs */
74 struct kmem_cache_order_objects max
;
75 struct kmem_cache_order_objects min
;
76 gfp_t allocflags
; /* gfp flags to use on each alloc */
77 int refcount
; /* Refcount for slab cache destroy */
79 int inuse
; /* Offset to metadata */
80 int align
; /* Alignment */
81 int reserved
; /* Reserved bytes at the end of slabs */
82 const char *name
; /* Name (only for display!) */
83 struct list_head list
; /* List of slab caches */
85 struct kobject kobj
; /* For sysfs */
87 #ifdef CONFIG_MEMCG_KMEM
88 struct memcg_cache_params
*memcg_params
;
89 int max_attr_size
; /* for propagation, maximum size of a stored attr */
91 struct kset
*memcg_kset
;
97 * Defragmentation by allocating from a remote node.
99 int remote_node_defrag_ratio
;
101 struct kmem_cache_node
*node
[MAX_NUMNODES
];
105 #define SLAB_SUPPORTS_SYSFS
106 void sysfs_slab_remove(struct kmem_cache
*);
108 static inline void sysfs_slab_remove(struct kmem_cache
*s
)
113 #endif /* _LINUX_SLUB_DEF_H */