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#include <linux/cgroup.h>
15
16#ifdef CONFIG_CPUSETS
17
18extern int number_of_cpusets; /* How many cpusets are defined in system? */
19
20extern int cpuset_init_early(void);
21extern int cpuset_init(void);
22extern void cpuset_init_smp(void);
23extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
24extern void cpuset_cpus_allowed_locked(struct task_struct *p,
25 struct cpumask *mask);
26extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
27#define cpuset_current_mems_allowed (current->mems_allowed)
28void cpuset_init_current_mems_allowed(void);
29void cpuset_update_task_memory_state(void);
30int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
31
32extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
33extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
34
35static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
36{
37 return number_of_cpusets <= 1 ||
38 __cpuset_zone_allowed_softwall(z, gfp_mask);
39}
40
41static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
42{
43 return number_of_cpusets <= 1 ||
44 __cpuset_zone_allowed_hardwall(z, gfp_mask);
45}
46
47extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
48 const struct task_struct *tsk2);
49
50#define cpuset_memory_pressure_bump() \
51 do { \
52 if (cpuset_memory_pressure_enabled) \
53 __cpuset_memory_pressure_bump(); \
54 } while (0)
55extern int cpuset_memory_pressure_enabled;
56extern void __cpuset_memory_pressure_bump(void);
57
58extern const struct file_operations proc_cpuset_operations;
59struct seq_file;
60extern void cpuset_task_status_allowed(struct seq_file *m,
61 struct task_struct *task);
62
63extern void cpuset_lock(void);
64extern void cpuset_unlock(void);
65
66extern int cpuset_mem_spread_node(void);
67
68static inline int cpuset_do_page_mem_spread(void)
69{
70 return current->flags & PF_SPREAD_PAGE;
71}
72
73static inline int cpuset_do_slab_mem_spread(void)
74{
75 return current->flags & PF_SPREAD_SLAB;
76}
77
78extern int current_cpuset_is_being_rebound(void);
79
80extern void rebuild_sched_domains(void);
81
82extern void cpuset_print_task_mems_allowed(struct task_struct *p);
83
84#else /* !CONFIG_CPUSETS */
85
86static inline int cpuset_init_early(void) { return 0; }
87static inline int cpuset_init(void) { return 0; }
88static inline void cpuset_init_smp(void) {}
89
90static inline void cpuset_cpus_allowed(struct task_struct *p,
91 struct cpumask *mask)
92{
93 *mask = cpu_possible_map;
94}
95static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
96 struct cpumask *mask)
97{
98 *mask = cpu_possible_map;
99}
100
101static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
102{
103 return node_possible_map;
104}
105
106#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
107static inline void cpuset_init_current_mems_allowed(void) {}
108static inline void cpuset_update_task_memory_state(void) {}
109
110static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
111{
112 return 1;
113}
114
115static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
116{
117 return 1;
118}
119
120static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
121{
122 return 1;
123}
124
125static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
126 const struct task_struct *tsk2)
127{
128 return 1;
129}
130
131static inline void cpuset_memory_pressure_bump(void) {}
132
133static inline void cpuset_task_status_allowed(struct seq_file *m,
134 struct task_struct *task)
135{
136}
137
138static inline void cpuset_lock(void) {}
139static inline void cpuset_unlock(void) {}
140
141static inline int cpuset_mem_spread_node(void)
142{
143 return 0;
144}
145
146static inline int cpuset_do_page_mem_spread(void)
147{
148 return 0;
149}
150
151static inline int cpuset_do_slab_mem_spread(void)
152{
153 return 0;
154}
155
156static inline int current_cpuset_is_being_rebound(void)
157{
158 return 0;
159}
160
161static inline void rebuild_sched_domains(void)
162{
163 partition_sched_domains(1, NULL, NULL);
164}
165
166static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
167{
168}
169
170#endif /* !CONFIG_CPUSETS */
171
172#endif /* _LINUX_CPUSET_H */