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Linux kernel mirror (for testing)
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kernel
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linux
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 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
51#else /* !CONFIG_CPUSETS */
52
53static inline int cpuset_init_early(void) { return 0; }
54static inline int cpuset_init(void) { return 0; }
55static inline void cpuset_init_smp(void) {}
56static inline void cpuset_fork(struct task_struct *p) {}
57static inline void cpuset_exit(struct task_struct *p) {}
58
59static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
60{
61 return cpu_possible_map;
62}
63
64static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
65{
66 return node_possible_map;
67}
68
69static inline void cpuset_init_current_mems_allowed(void) {}
70static inline void cpuset_update_task_memory_state(void) {}
71#define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
72
73static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
74{
75 return 1;
76}
77
78static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
79{
80 return 1;
81}
82
83static inline int cpuset_excl_nodes_overlap(const struct task_struct *p)
84{
85 return 1;
86}
87
88static inline void cpuset_memory_pressure_bump(void) {}
89
90static inline char *cpuset_task_status_allowed(struct task_struct *task,
91 char *buffer)
92{
93 return buffer;
94}
95
96#endif /* !CONFIG_CPUSETS */
97
98#endif /* _LINUX_CPUSET_H */