Linux kernel mirror (for testing)
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1#ifndef _LINUX_CPUSET_H
2#define _LINUX_CPUSET_H
3/*
4 * cpuset interface
5 *
6 * Copyright (C) 2003 BULL SA
7 * Copyright (C) 2004-2006 Silicon Graphics, Inc.
8 *
9 */
10
11#include <linux/sched.h>
12#include <linux/cpumask.h>
13#include <linux/nodemask.h>
14
15#ifdef CONFIG_CPUSETS
16
17extern int number_of_cpusets; /* How many cpusets are defined in system? */
18
19extern int cpuset_init_early(void);
20extern 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);
24extern cpumask_t cpuset_cpus_allowed(struct task_struct *p);
25extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
26void cpuset_init_current_mems_allowed(void);
27void cpuset_update_task_memory_state(void);
28#define cpuset_nodes_subset_current_mems_allowed(nodes) \
29 nodes_subset((nodes), current->mems_allowed)
30int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl);
31
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
38extern int cpuset_excl_nodes_overlap(const struct task_struct *p);
39
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
48extern struct file_operations proc_cpuset_operations;
49extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer);
50
51extern void cpuset_lock(void);
52extern void cpuset_unlock(void);
53
54extern 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
66#else /* !CONFIG_CPUSETS */
67
68static inline int cpuset_init_early(void) { return 0; }
69static 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
79static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
80{
81 return node_possible_map;
82}
83
84static inline void cpuset_init_current_mems_allowed(void) {}
85static inline void cpuset_update_task_memory_state(void) {}
86#define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
87
88static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
89{
90 return 1;
91}
92
93static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
94{
95 return 1;
96}
97
98static inline int cpuset_excl_nodes_overlap(const struct task_struct *p)
99{
100 return 1;
101}
102
103static inline void cpuset_memory_pressure_bump(void) {}
104
105static inline char *cpuset_task_status_allowed(struct task_struct *task,
106 char *buffer)
107{
108 return buffer;
109}
110
111static inline void cpuset_lock(void) {}
112static inline void cpuset_unlock(void) {}
113
114static 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
129#endif /* !CONFIG_CPUSETS */
130
131#endif /* _LINUX_CPUSET_H */