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-rw-r--r--kernel/include/linux/slab_def.h79
1 files changed, 79 insertions, 0 deletions
diff --git a/kernel/include/linux/slab_def.h b/kernel/include/linux/slab_def.h
new file mode 100644
index 000000000..33d049066
--- /dev/null
+++ b/kernel/include/linux/slab_def.h
@@ -0,0 +1,79 @@
+#ifndef _LINUX_SLAB_DEF_H
+#define _LINUX_SLAB_DEF_H
+
+#include <linux/reciprocal_div.h>
+
+/*
+ * Definitions unique to the original Linux SLAB allocator.
+ */
+
+struct kmem_cache {
+ struct array_cache __percpu *cpu_cache;
+
+/* 1) Cache tunables. Protected by slab_mutex */
+ unsigned int batchcount;
+ unsigned int limit;
+ unsigned int shared;
+
+ unsigned int size;
+ struct reciprocal_value reciprocal_buffer_size;
+/* 2) touched by every alloc & free from the backend */
+
+ unsigned int flags; /* constant flags */
+ unsigned int num; /* # of objs per slab */
+
+/* 3) cache_grow/shrink */
+ /* order of pgs per slab (2^n) */
+ unsigned int gfporder;
+
+ /* force GFP flags, e.g. GFP_DMA */
+ gfp_t allocflags;
+
+ size_t colour; /* cache colouring range */
+ unsigned int colour_off; /* colour offset */
+ struct kmem_cache *freelist_cache;
+ unsigned int freelist_size;
+
+ /* constructor func */
+ void (*ctor)(void *obj);
+
+/* 4) cache creation/removal */
+ const char *name;
+ struct list_head list;
+ int refcount;
+ int object_size;
+ int align;
+
+/* 5) statistics */
+#ifdef CONFIG_DEBUG_SLAB
+ unsigned long num_active;
+ unsigned long num_allocations;
+ unsigned long high_mark;
+ unsigned long grown;
+ unsigned long reaped;
+ unsigned long errors;
+ unsigned long max_freeable;
+ unsigned long node_allocs;
+ unsigned long node_frees;
+ unsigned long node_overflow;
+ atomic_t allochit;
+ atomic_t allocmiss;
+ atomic_t freehit;
+ atomic_t freemiss;
+
+ /*
+ * If debugging is enabled, then the allocator can add additional
+ * fields and/or padding to every object. size contains the total
+ * object size including these internal fields, the following two
+ * variables contain the offset to the user object and its size.
+ */
+ int obj_offset;
+#endif /* CONFIG_DEBUG_SLAB */
+#ifdef CONFIG_MEMCG_KMEM
+ struct memcg_cache_params memcg_params;
+#endif
+
+ struct kmem_cache_node *node[MAX_NUMNODES];
+};
+
+#endif /* _LINUX_SLAB_DEF_H */