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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>
Paul Menage8793d852007-10-18 23:39:39 -070014#include <linux/cgroup.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
16#ifdef CONFIG_CPUSETS
17
Paul Jackson202f72d2006-01-08 01:01:57 -080018extern int number_of_cpusets; /* How many cpusets are defined in system? */
19
Paul Jacksonc417f022006-01-08 01:02:01 -080020extern int cpuset_init_early(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070021extern int cpuset_init(void);
22extern void cpuset_init_smp(void);
Paul Jackson909d75a2006-01-08 01:01:55 -080023extern cpumask_t cpuset_cpus_allowed(struct task_struct *p);
Cliff Wickman470fd642007-10-18 23:40:46 -070024extern cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p);
Paul Jackson909d75a2006-01-08 01:01:55 -080025extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
Paul Jackson9276b1bc2006-12-06 20:31:48 -080026#define cpuset_current_mems_allowed (current->mems_allowed)
Linus Torvalds1da177e2005-04-16 15:20:36 -070027void cpuset_init_current_mems_allowed(void);
Paul Jacksoncf2a473c2006-01-08 01:01:54 -080028void cpuset_update_task_memory_state(void);
Paul Jackson59665142006-01-08 01:01:47 -080029#define cpuset_nodes_subset_current_mems_allowed(nodes) \
30 nodes_subset((nodes), current->mems_allowed)
Linus Torvalds1da177e2005-04-16 15:20:36 -070031int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl);
Paul Jackson202f72d2006-01-08 01:01:57 -080032
Paul Jackson02a0e532006-12-13 00:34:25 -080033extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
34extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
35
36static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
Paul Jackson202f72d2006-01-08 01:01:57 -080037{
Paul Jackson02a0e532006-12-13 00:34:25 -080038 return number_of_cpusets <= 1 ||
39 __cpuset_zone_allowed_softwall(z, gfp_mask);
40}
41
42static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
43{
44 return number_of_cpusets <= 1 ||
45 __cpuset_zone_allowed_hardwall(z, gfp_mask);
Paul Jackson202f72d2006-01-08 01:01:57 -080046}
47
David Rientjesbbe373f2007-10-16 23:25:58 -070048extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
49 const struct task_struct *tsk2);
Paul Jackson3e0d98b2006-01-08 01:01:49 -080050
51#define cpuset_memory_pressure_bump() \
52 do { \
53 if (cpuset_memory_pressure_enabled) \
54 __cpuset_memory_pressure_bump(); \
55 } while (0)
56extern int cpuset_memory_pressure_enabled;
57extern void __cpuset_memory_pressure_bump(void);
58
Arjan van de Ven54047322007-02-12 00:55:28 -080059extern const struct file_operations proc_cpuset_operations;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer);
61
Paul Jackson505970b2006-01-14 13:21:06 -080062extern void cpuset_lock(void);
63extern void cpuset_unlock(void);
64
Paul Jackson825a46a2006-03-24 03:16:03 -080065extern int cpuset_mem_spread_node(void);
66
67static inline int cpuset_do_page_mem_spread(void)
68{
69 return current->flags & PF_SPREAD_PAGE;
70}
71
72static inline int cpuset_do_slab_mem_spread(void)
73{
74 return current->flags & PF_SPREAD_SLAB;
75}
76
Paul Jackson38837fc2006-09-29 02:01:16 -070077extern void cpuset_track_online_nodes(void);
78
Paul Menage8793d852007-10-18 23:39:39 -070079extern int current_cpuset_is_being_rebound(void);
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081#else /* !CONFIG_CPUSETS */
82
Paul Jacksonc417f022006-01-08 01:02:01 -080083static inline int cpuset_init_early(void) { return 0; }
Linus Torvalds1da177e2005-04-16 15:20:36 -070084static inline int cpuset_init(void) { return 0; }
85static inline void cpuset_init_smp(void) {}
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
87static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
88{
89 return cpu_possible_map;
90}
Cliff Wickman470fd642007-10-18 23:40:46 -070091static inline cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p)
92{
93 return cpu_possible_map;
94}
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Paul Jackson909d75a2006-01-08 01:01:55 -080096static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
97{
98 return node_possible_map;
99}
100
Christoph Lameter0e1e7c72007-10-16 01:25:38 -0700101#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102static inline void cpuset_init_current_mems_allowed(void) {}
Paul Jacksoncf2a473c2006-01-08 01:01:54 -0800103static inline void cpuset_update_task_memory_state(void) {}
Paul Jackson59665142006-01-08 01:01:47 -0800104#define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
106static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
107{
108 return 1;
109}
110
Paul Jackson02a0e532006-12-13 00:34:25 -0800111static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
112{
113 return 1;
114}
115
116static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117{
118 return 1;
119}
120
David Rientjesbbe373f2007-10-16 23:25:58 -0700121static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
122 const struct task_struct *tsk2)
Paul Jacksonef08e3b2005-09-06 15:18:13 -0700123{
124 return 1;
125}
126
Paul Jackson3e0d98b2006-01-08 01:01:49 -0800127static inline void cpuset_memory_pressure_bump(void) {}
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129static inline char *cpuset_task_status_allowed(struct task_struct *task,
130 char *buffer)
131{
132 return buffer;
133}
134
Paul Jackson505970b2006-01-14 13:21:06 -0800135static inline void cpuset_lock(void) {}
136static inline void cpuset_unlock(void) {}
137
Paul Jackson825a46a2006-03-24 03:16:03 -0800138static inline int cpuset_mem_spread_node(void)
139{
140 return 0;
141}
142
143static inline int cpuset_do_page_mem_spread(void)
144{
145 return 0;
146}
147
148static inline int cpuset_do_slab_mem_spread(void)
149{
150 return 0;
151}
152
Paul Jackson38837fc2006-09-29 02:01:16 -0700153static inline void cpuset_track_online_nodes(void) {}
154
Paul Menage8793d852007-10-18 23:39:39 -0700155static inline int current_cpuset_is_being_rebound(void)
156{
157 return 0;
158}
159
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160#endif /* !CONFIG_CPUSETS */
161
162#endif /* _LINUX_CPUSET_H */