zsmalloc.h

 1/*
 2 * zsmalloc memory allocator
 3 *
 4 * Copyright (C) 2011  Nitin Gupta
 5 * Copyright (C) 2012, 2013 Minchan Kim
 6 *
 7 * This code is released using a dual license strategy: BSD/GPL
 8 * You can choose the license that better fits your requirements.
 9 *
10 * Released under the terms of 3-clause BSD License
11 * Released under the terms of GNU General Public License Version 2.0
12 */
13
14#ifndef _ZS_MALLOC_H_
15#define _ZS_MALLOC_H_
16
17#include <linux/types.h>
18
19struct zs_pool_stats {
20	/* How many pages were migrated (freed) */
21	atomic_long_t pages_compacted;
22};
23
24struct zs_pool;
25
26struct zs_pool *zs_create_pool(const char *name);
27void zs_destroy_pool(struct zs_pool *pool);
28
29unsigned long zs_malloc(struct zs_pool *pool, size_t size, gfp_t flags,
30			const int nid);
31void zs_free(struct zs_pool *pool, unsigned long obj);
32
33size_t zs_huge_class_size(struct zs_pool *pool);
34
35unsigned long zs_get_total_pages(struct zs_pool *pool);
36unsigned long zs_compact(struct zs_pool *pool);
37
38unsigned int zs_lookup_class_index(struct zs_pool *pool, unsigned int size);
39
40void zs_pool_stats(struct zs_pool *pool, struct zs_pool_stats *stats);
41
42void *zs_obj_read_begin(struct zs_pool *pool, unsigned long handle,
43			void *local_copy);
44void zs_obj_read_end(struct zs_pool *pool, unsigned long handle,
45		     void *handle_mem);
46void zs_obj_write(struct zs_pool *pool, unsigned long handle,
47		  void *handle_mem, size_t mem_len);
48
49extern const struct movable_operations zsmalloc_mops;
50
51#endif