1 #ifndef _LINUX_CPUSET_H
2 #define _LINUX_CPUSET_H
6 * Copyright (C) 2003 BULL SA
7 * Copyright (C) 2004-2006 Silicon Graphics, Inc.
11 #include <linux/sched.h>
12 #include <linux/cpumask.h>
13 #include <linux/nodemask.h>
14 #include <linux/cgroup.h>
19 extern int number_of_cpusets; /* How many cpusets are defined in system? */
21 extern int cpuset_init(void);
22 extern void cpuset_init_smp(void);
23 extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
24 extern void cpuset_cpus_allowed_locked(struct task_struct *p,
25 struct cpumask *mask);
26 extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
27 #define cpuset_current_mems_allowed (current->mems_allowed)
28 void cpuset_init_current_mems_allowed(void);
29 int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
31 extern int __cpuset_node_allowed_softwall(int node, gfp_t gfp_mask);
32 extern int __cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask);
34 static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
36 return number_of_cpusets <= 1 ||
37 __cpuset_node_allowed_softwall(node, gfp_mask);
40 static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
42 return number_of_cpusets <= 1 ||
43 __cpuset_node_allowed_hardwall(node, gfp_mask);
46 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
48 return cpuset_node_allowed_softwall(zone_to_nid(z), gfp_mask);
51 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
53 return cpuset_node_allowed_hardwall(zone_to_nid(z), gfp_mask);
56 extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
57 const struct task_struct *tsk2);
59 #define cpuset_memory_pressure_bump() \
61 if (cpuset_memory_pressure_enabled) \
62 __cpuset_memory_pressure_bump(); \
64 extern int cpuset_memory_pressure_enabled;
65 extern void __cpuset_memory_pressure_bump(void);
67 extern const struct file_operations proc_cpuset_operations;
69 extern void cpuset_task_status_allowed(struct seq_file *m,
70 struct task_struct *task);
72 extern void cpuset_lock(void);
73 extern void cpuset_unlock(void);
75 extern int cpuset_mem_spread_node(void);
77 static inline int cpuset_do_page_mem_spread(void)
79 return current->flags & PF_SPREAD_PAGE;
82 static inline int cpuset_do_slab_mem_spread(void)
84 return current->flags & PF_SPREAD_SLAB;
87 extern int current_cpuset_is_being_rebound(void);
89 extern void rebuild_sched_domains(void);
91 extern void cpuset_print_task_mems_allowed(struct task_struct *p);
93 static inline void set_mems_allowed(nodemask_t nodemask)
95 current->mems_allowed = nodemask;
98 #else /* !CONFIG_CPUSETS */
100 static inline int cpuset_init(void) { return 0; }
101 static inline void cpuset_init_smp(void) {}
103 static inline void cpuset_cpus_allowed(struct task_struct *p,
104 struct cpumask *mask)
106 cpumask_copy(mask, cpu_possible_mask);
108 static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
109 struct cpumask *mask)
111 cpumask_copy(mask, cpu_possible_mask);
114 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
116 return node_possible_map;
119 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
120 static inline void cpuset_init_current_mems_allowed(void) {}
122 static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
127 static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask)
132 static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask)
137 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
142 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
147 static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
148 const struct task_struct *tsk2)
153 static inline void cpuset_memory_pressure_bump(void) {}
155 static inline void cpuset_task_status_allowed(struct seq_file *m,
156 struct task_struct *task)
160 static inline void cpuset_lock(void) {}
161 static inline void cpuset_unlock(void) {}
163 static inline int cpuset_mem_spread_node(void)
168 static inline int cpuset_do_page_mem_spread(void)
173 static inline int cpuset_do_slab_mem_spread(void)
178 static inline int current_cpuset_is_being_rebound(void)
183 static inline void rebuild_sched_domains(void)
185 partition_sched_domains(1, NULL, NULL);
188 static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
192 static inline void set_mems_allowed(nodemask_t nodemask)
196 #endif /* !CONFIG_CPUSETS */
198 #endif /* _LINUX_CPUSET_H */