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 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 void cpuset_update_task_memory_state(void);
30 int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
32 extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
33 extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
35 static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
37 return number_of_cpusets <= 1 ||
38 __cpuset_zone_allowed_softwall(z, gfp_mask);
41 static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
43 return number_of_cpusets <= 1 ||
44 __cpuset_zone_allowed_hardwall(z, gfp_mask);
47 extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
48 const struct task_struct *tsk2);
50 #define cpuset_memory_pressure_bump() \
52 if (cpuset_memory_pressure_enabled) \
53 __cpuset_memory_pressure_bump(); \
55 extern int cpuset_memory_pressure_enabled;
56 extern void __cpuset_memory_pressure_bump(void);
58 extern const struct file_operations proc_cpuset_operations;
60 extern void cpuset_task_status_allowed(struct seq_file *m,
61 struct task_struct *task);
63 extern void cpuset_lock(void);
64 extern void cpuset_unlock(void);
66 extern int cpuset_mem_spread_node(void);
68 static inline int cpuset_do_page_mem_spread(void)
70 return current->flags & PF_SPREAD_PAGE;
73 static inline int cpuset_do_slab_mem_spread(void)
75 return current->flags & PF_SPREAD_SLAB;
78 extern int current_cpuset_is_being_rebound(void);
80 extern void rebuild_sched_domains(void);
82 extern void cpuset_print_task_mems_allowed(struct task_struct *p);
84 #else /* !CONFIG_CPUSETS */
86 static inline int cpuset_init_early(void) { return 0; }
87 static inline int cpuset_init(void) { return 0; }
88 static inline void cpuset_init_smp(void) {}
90 static inline void cpuset_cpus_allowed(struct task_struct *p,
93 *mask = cpu_possible_map;
95 static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
98 *mask = cpu_possible_map;
101 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
103 return node_possible_map;
106 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
107 static inline void cpuset_init_current_mems_allowed(void) {}
108 static inline void cpuset_update_task_memory_state(void) {}
110 static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
115 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
120 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
125 static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
126 const struct task_struct *tsk2)
131 static inline void cpuset_memory_pressure_bump(void) {}
133 static inline void cpuset_task_status_allowed(struct seq_file *m,
134 struct task_struct *task)
138 static inline void cpuset_lock(void) {}
139 static inline void cpuset_unlock(void) {}
141 static inline int cpuset_mem_spread_node(void)
146 static inline int cpuset_do_page_mem_spread(void)
151 static inline int cpuset_do_slab_mem_spread(void)
156 static inline int current_cpuset_is_being_rebound(void)
161 static inline void rebuild_sched_domains(void)
163 partition_sched_domains(1, NULL, NULL);
166 static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
170 #endif /* !CONFIG_CPUSETS */
172 #endif /* _LINUX_CPUSET_H */