blob: 9354722a9217807cb0d4d6a2d3e716a0db73bb25 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_CPUSET_H
2#define _LINUX_CPUSET_H
3/*
4 * cpuset interface
5 *
6 * Copyright (C) 2003 BULL SA
Paul Jackson825a46a2006-03-24 03:16:03 -08007 * Copyright (C) 2004-2006 Silicon Graphics, Inc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 *
9 */
10
11#include <linux/sched.h>
12#include <linux/cpumask.h>
13#include <linux/nodemask.h>
14
15#ifdef CONFIG_CPUSETS
16
Paul Jackson202f72d2006-01-08 01:01:57 -080017extern int number_of_cpusets; /* How many cpusets are defined in system? */
18
Paul Jacksonc417f022006-01-08 01:02:01 -080019extern int cpuset_init_early(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070020extern int cpuset_init(void);
21extern void cpuset_init_smp(void);
22extern void cpuset_fork(struct task_struct *p);
23extern void cpuset_exit(struct task_struct *p);
Paul Jackson909d75a2006-01-08 01:01:55 -080024extern cpumask_t cpuset_cpus_allowed(struct task_struct *p);
25extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -070026void cpuset_init_current_mems_allowed(void);
Paul Jacksoncf2a473c2006-01-08 01:01:54 -080027void cpuset_update_task_memory_state(void);
Paul Jackson59665142006-01-08 01:01:47 -080028#define cpuset_nodes_subset_current_mems_allowed(nodes) \
29 nodes_subset((nodes), current->mems_allowed)
Linus Torvalds1da177e2005-04-16 15:20:36 -070030int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl);
Paul Jackson202f72d2006-01-08 01:01:57 -080031
32extern int __cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask);
33static int inline cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
34{
35 return number_of_cpusets <= 1 || __cpuset_zone_allowed(z, gfp_mask);
36}
37
Paul Jacksonef08e3b2005-09-06 15:18:13 -070038extern int cpuset_excl_nodes_overlap(const struct task_struct *p);
Paul Jackson3e0d98b2006-01-08 01:01:49 -080039
40#define cpuset_memory_pressure_bump() \
41 do { \
42 if (cpuset_memory_pressure_enabled) \
43 __cpuset_memory_pressure_bump(); \
44 } while (0)
45extern int cpuset_memory_pressure_enabled;
46extern void __cpuset_memory_pressure_bump(void);
47
Linus Torvalds1da177e2005-04-16 15:20:36 -070048extern struct file_operations proc_cpuset_operations;
49extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer);
50
Paul Jackson505970b2006-01-14 13:21:06 -080051extern void cpuset_lock(void);
52extern void cpuset_unlock(void);
53
Paul Jackson825a46a2006-03-24 03:16:03 -080054extern int cpuset_mem_spread_node(void);
55
56static inline int cpuset_do_page_mem_spread(void)
57{
58 return current->flags & PF_SPREAD_PAGE;
59}
60
61static inline int cpuset_do_slab_mem_spread(void)
62{
63 return current->flags & PF_SPREAD_SLAB;
64}
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066#else /* !CONFIG_CPUSETS */
67
Paul Jacksonc417f022006-01-08 01:02:01 -080068static inline int cpuset_init_early(void) { return 0; }
Linus Torvalds1da177e2005-04-16 15:20:36 -070069static inline int cpuset_init(void) { return 0; }
70static inline void cpuset_init_smp(void) {}
71static inline void cpuset_fork(struct task_struct *p) {}
72static inline void cpuset_exit(struct task_struct *p) {}
73
74static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
75{
76 return cpu_possible_map;
77}
78
Paul Jackson909d75a2006-01-08 01:01:55 -080079static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
80{
81 return node_possible_map;
82}
83
Linus Torvalds1da177e2005-04-16 15:20:36 -070084static inline void cpuset_init_current_mems_allowed(void) {}
Paul Jacksoncf2a473c2006-01-08 01:01:54 -080085static inline void cpuset_update_task_memory_state(void) {}
Paul Jackson59665142006-01-08 01:01:47 -080086#define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
89{
90 return 1;
91}
92
Al Virodd0fc662005-10-07 07:46:04 +010093static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070094{
95 return 1;
96}
97
Paul Jacksonef08e3b2005-09-06 15:18:13 -070098static inline int cpuset_excl_nodes_overlap(const struct task_struct *p)
99{
100 return 1;
101}
102
Paul Jackson3e0d98b2006-01-08 01:01:49 -0800103static inline void cpuset_memory_pressure_bump(void) {}
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105static inline char *cpuset_task_status_allowed(struct task_struct *task,
106 char *buffer)
107{
108 return buffer;
109}
110
Paul Jackson505970b2006-01-14 13:21:06 -0800111static inline void cpuset_lock(void) {}
112static inline void cpuset_unlock(void) {}
113
Paul Jackson825a46a2006-03-24 03:16:03 -0800114static inline int cpuset_mem_spread_node(void)
115{
116 return 0;
117}
118
119static inline int cpuset_do_page_mem_spread(void)
120{
121 return 0;
122}
123
124static inline int cpuset_do_slab_mem_spread(void)
125{
126 return 0;
127}
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129#endif /* !CONFIG_CPUSETS */
130
131#endif /* _LINUX_CPUSET_H */