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1: #ifndef _LINUX_SLUB_DEF_H 2: #define _LINUX_SLUB_DEF_H 3: 4: /* 5: * SLUB : A Slab allocator without object queues. 6: * 7: * (C) 2007 SGI, Christoph Lameter 8: */ 9: #include <linux/kobject.h> 10: 11: enum stat_item { 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 */ 38: NR_SLUB_STAT_ITEMS }; 39: 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]; 47: #endif 48: }; 49: 50: /* 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. 54: */ 55: struct kmem_cache_order_objects { 56: unsigned long x; 57: }; 58: 59: /* 60: * Slab cache management. 61: */ 62: struct kmem_cache { 63: struct kmem_cache_cpu __percpu *cpu_slab; 64: /* Used for retriving partial slabs etc */ 65: unsigned long flags; 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; 72: 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 */ 78: void (*ctor)(void *); 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 */ 84: #ifdef CONFIG_SYSFS 85: struct kobject kobj; /* For sysfs */ 86: #endif 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 */ 90: #endif 91: 92: #ifdef CONFIG_NUMA 93: /* 94: * Defragmentation by allocating from a remote node. 95: */ 96: int remote_node_defrag_ratio; 97: #endif 98: struct kmem_cache_node *node[MAX_NUMNODES]; 99: }; 100: 101: #endif /* _LINUX_SLUB_DEF_H */ 102: