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
18 extern int number_of_cpusets; /* How many cpusets are defined in system? */
19
20 extern int cpuset_init_early(void);
21 extern int cpuset_init(void);
22 extern void cpuset_init_smp(void);
23 extern cpumask_t cpuset_cpus_allowed(struct task_struct *p);
24 extern cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p);
25 extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
26 #define cpuset_current_mems_allowed (current->mems_allowed)
27 void cpuset_init_current_mems_allowed(void);
28 void cpuset_update_task_memory_state(void);
29 int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl);
30
31 extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
32 extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
33
34 static 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
40 static 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
46 extern 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)
54 extern int cpuset_memory_pressure_enabled;
55 extern void __cpuset_memory_pressure_bump(void);
56
57 extern const struct file_operations proc_cpuset_operations;
58 struct seq_file;
59 extern void cpuset_task_status_allowed(struct seq_file *m,
60 struct task_struct *task);
61
62 extern void cpuset_lock(void);
63 extern void cpuset_unlock(void);
64
65 extern int cpuset_mem_spread_node(void);
66
67 static inline int cpuset_do_page_mem_spread(void)
68 {
69 return current->flags & PF_SPREAD_PAGE;
70 }
71
72 static inline int cpuset_do_slab_mem_spread(void)
73 {
74 return current->flags & PF_SPREAD_SLAB;
75 }
76
77 extern void cpuset_track_online_nodes(void);
78
79 extern int current_cpuset_is_being_rebound(void);
80
81 #else /* !CONFIG_CPUSETS */
82
83 static inline int cpuset_init_early(void) { return 0; }
84 static inline int cpuset_init(void) { return 0; }
85 static inline void cpuset_init_smp(void) {}
86
87 static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
88 {
89 return cpu_possible_map;
90 }
91 static inline cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p)
92 {
93 return cpu_possible_map;
94 }
95
96 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
97 {
98 return node_possible_map;
99 }
100
101 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
102 static inline void cpuset_init_current_mems_allowed(void) {}
103 static inline void cpuset_update_task_memory_state(void) {}
104
105 static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
106 {
107 return 1;
108 }
109
110 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
111 {
112 return 1;
113 }
114
115 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
116 {
117 return 1;
118 }
119
120 static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
121 const struct task_struct *tsk2)
122 {
123 return 1;
124 }
125
126 static inline void cpuset_memory_pressure_bump(void) {}
127
128 static inline void cpuset_task_status_allowed(struct seq_file *m,
129 struct task_struct *task)
130 {
131 }
132
133 static inline void cpuset_lock(void) {}
134 static inline void cpuset_unlock(void) {}
135
136 static inline int cpuset_mem_spread_node(void)
137 {
138 return 0;
139 }
140
141 static inline int cpuset_do_page_mem_spread(void)
142 {
143 return 0;
144 }
145
146 static inline int cpuset_do_slab_mem_spread(void)
147 {
148 return 0;
149 }
150
151 static inline void cpuset_track_online_nodes(void) {}
152
153 static inline int current_cpuset_is_being_rebound(void)
154 {
155 return 0;
156 }
157
158 #endif /* !CONFIG_CPUSETS */
159
160 #endif /* _LINUX_CPUSET_H */
161
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