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, cpumask_t *mask);
24extern void cpuset_cpus_allowed_locked(struct task_struct *p, cpumask_t *mask);
25extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
26#define cpuset_current_mems_allowed (current->mems_allowed)
27void cpuset_init_current_mems_allowed(void);
28void cpuset_update_task_memory_state(void);
29int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
30
31extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
32extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
33
34static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
35{
36 return number_of_cpusets <= 1 ||
37 __cpuset_zone_allowed_softwall(z, gfp_mask);
38}
39
40static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
41{
42 return number_of_cpusets <= 1 ||
43 __cpuset_zone_allowed_hardwall(z, gfp_mask);
44}
45
46extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
47 const struct task_struct *tsk2);
48
49#define cpuset_memory_pressure_bump() \
50 do { \
51 if (cpuset_memory_pressure_enabled) \
52 __cpuset_memory_pressure_bump(); \
53 } while (0)
54extern int cpuset_memory_pressure_enabled;
55extern void __cpuset_memory_pressure_bump(void);
56
57extern const struct file_operations proc_cpuset_operations;
58struct seq_file;
59extern void cpuset_task_status_allowed(struct seq_file *m,
60 struct task_struct *task);
61
62extern void cpuset_lock(void);
63extern void cpuset_unlock(void);
64
65extern 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
77extern void cpuset_track_online_nodes(void);
78
79extern int current_cpuset_is_being_rebound(void);
80
81#else /* !CONFIG_CPUSETS */
82
83static inline int cpuset_init_early(void) { return 0; }
84static inline int cpuset_init(void) { return 0; }
85static inline void cpuset_init_smp(void) {}
86
87static inline void cpuset_cpus_allowed(struct task_struct *p, cpumask_t *mask)
88{
89 *mask = cpu_possible_map;
90}
91static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
92 cpumask_t *mask)
93{
94 *mask = cpu_possible_map;
95}
96
97static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
98{
99 return node_possible_map;
100}
101
102#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
103static inline void cpuset_init_current_mems_allowed(void) {}
104static inline void cpuset_update_task_memory_state(void) {}
105
106static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
107{
108 return 1;
109}
110
111static 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)
117{
118 return 1;
119}
120
121static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
122 const struct task_struct *tsk2)
123{
124 return 1;
125}
126
127static inline void cpuset_memory_pressure_bump(void) {}
128
129static inline void cpuset_task_status_allowed(struct seq_file *m,
130 struct task_struct *task)
131{
132}
133
134static inline void cpuset_lock(void) {}
135static inline void cpuset_unlock(void) {}
136
137static inline int cpuset_mem_spread_node(void)
138{
139 return 0;
140}
141
142static inline int cpuset_do_page_mem_spread(void)
143{
144 return 0;
145}
146
147static inline int cpuset_do_slab_mem_spread(void)
148{
149 return 0;
150}
151
152static inline void cpuset_track_online_nodes(void) {}
153
154static inline int current_cpuset_is_being_rebound(void)
155{
156 return 0;
157}
158
159#endif /* !CONFIG_CPUSETS */
160
161#endif /* _LINUX_CPUSET_H */