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>
18 extern int number_of_cpusets; /* How many cpusets are defined in system? */
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 #define cpuset_nodes_subset_current_mems_allowed(nodes) \
30 nodes_subset((nodes), current->mems_allowed)
31 int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl);
33 extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
34 extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
36 static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
38 return number_of_cpusets <= 1 ||
39 __cpuset_zone_allowed_softwall(z, gfp_mask);
42 static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
44 return number_of_cpusets <= 1 ||
45 __cpuset_zone_allowed_hardwall(z, gfp_mask);
48 extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
49 const struct task_struct *tsk2);
51 #define cpuset_memory_pressure_bump() \
53 if (cpuset_memory_pressure_enabled) \
54 __cpuset_memory_pressure_bump(); \
56 extern int cpuset_memory_pressure_enabled;
57 extern void __cpuset_memory_pressure_bump(void);
59 extern const struct file_operations proc_cpuset_operations;
61 extern void cpuset_task_status_allowed(struct seq_file *m,
62 struct task_struct *task);
64 extern void cpuset_lock(void);
65 extern void cpuset_unlock(void);
67 extern int cpuset_mem_spread_node(void);
69 static inline int cpuset_do_page_mem_spread(void)
71 return current->flags & PF_SPREAD_PAGE;
74 static inline int cpuset_do_slab_mem_spread(void)
76 return current->flags & PF_SPREAD_SLAB;
79 extern void cpuset_track_online_nodes(void);
81 extern int current_cpuset_is_being_rebound(void);
83 #else /* !CONFIG_CPUSETS */
85 static inline int cpuset_init_early(void) { return 0; }
86 static inline int cpuset_init(void) { return 0; }
87 static inline void cpuset_init_smp(void) {}
89 static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
91 return cpu_possible_map;
93 static inline cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p)
95 return cpu_possible_map;
98 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
100 return node_possible_map;
103 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
104 static inline void cpuset_init_current_mems_allowed(void) {}
105 static inline void cpuset_update_task_memory_state(void) {}
106 #define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
108 static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
113 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
118 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
123 static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
124 const struct task_struct *tsk2)
129 static inline void cpuset_memory_pressure_bump(void) {}
131 static inline void cpuset_task_status_allowed(struct seq_file *m,
132 struct task_struct *task)
136 static inline void cpuset_lock(void) {}
137 static inline void cpuset_unlock(void) {}
139 static inline int cpuset_mem_spread_node(void)
144 static inline int cpuset_do_page_mem_spread(void)
149 static inline int cpuset_do_slab_mem_spread(void)
154 static inline void cpuset_track_online_nodes(void) {}
156 static inline int current_cpuset_is_being_rebound(void)
161 #endif /* !CONFIG_CPUSETS */
163 #endif /* _LINUX_CPUSET_H */