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 int cpuset_cpus_allowed_fallback(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 int cpuset_nodemask_valid_mems_allowed(nodemask_t
*nodemask
);
30 extern int __cpuset_node_allowed_softwall(int node
, gfp_t gfp_mask
);
31 extern int __cpuset_node_allowed_hardwall(int node
, gfp_t gfp_mask
);
33 static inline int cpuset_node_allowed_softwall(int node
, gfp_t gfp_mask
)
35 return number_of_cpusets
<= 1 ||
36 __cpuset_node_allowed_softwall(node
, gfp_mask
);
39 static inline int cpuset_node_allowed_hardwall(int node
, gfp_t gfp_mask
)
41 return number_of_cpusets
<= 1 ||
42 __cpuset_node_allowed_hardwall(node
, gfp_mask
);
45 static inline int cpuset_zone_allowed_softwall(struct zone
*z
, gfp_t gfp_mask
)
47 return cpuset_node_allowed_softwall(zone_to_nid(z
), gfp_mask
);
50 static inline int cpuset_zone_allowed_hardwall(struct zone
*z
, gfp_t gfp_mask
)
52 return cpuset_node_allowed_hardwall(zone_to_nid(z
), gfp_mask
);
55 extern int cpuset_mems_allowed_intersects(const struct task_struct
*tsk1
,
56 const struct task_struct
*tsk2
);
58 #define cpuset_memory_pressure_bump() \
60 if (cpuset_memory_pressure_enabled) \
61 __cpuset_memory_pressure_bump(); \
63 extern int cpuset_memory_pressure_enabled
;
64 extern void __cpuset_memory_pressure_bump(void);
66 extern const struct file_operations proc_cpuset_operations
;
68 extern void cpuset_task_status_allowed(struct seq_file
*m
,
69 struct task_struct
*task
);
71 extern int cpuset_mem_spread_node(void);
73 static inline int cpuset_do_page_mem_spread(void)
75 return current
->flags
& PF_SPREAD_PAGE
;
78 static inline int cpuset_do_slab_mem_spread(void)
80 return current
->flags
& PF_SPREAD_SLAB
;
83 extern int current_cpuset_is_being_rebound(void);
85 extern void rebuild_sched_domains(void);
87 extern void cpuset_print_task_mems_allowed(struct task_struct
*p
);
89 static inline void set_mems_allowed(nodemask_t nodemask
)
91 current
->mems_allowed
= nodemask
;
94 #else /* !CONFIG_CPUSETS */
96 static inline int cpuset_init(void) { return 0; }
97 static inline void cpuset_init_smp(void) {}
99 static inline void cpuset_cpus_allowed(struct task_struct
*p
,
100 struct cpumask
*mask
)
102 cpumask_copy(mask
, cpu_possible_mask
);
105 static inline int cpuset_cpus_allowed_fallback(struct task_struct
*p
)
107 cpumask_copy(&p
->cpus_allowed
, cpu_possible_mask
);
108 return cpumask_any(cpu_active_mask
);
111 static inline nodemask_t
cpuset_mems_allowed(struct task_struct
*p
)
113 return node_possible_map
;
116 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
117 static inline void cpuset_init_current_mems_allowed(void) {}
119 static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t
*nodemask
)
124 static inline int cpuset_node_allowed_softwall(int node
, gfp_t gfp_mask
)
129 static inline int cpuset_node_allowed_hardwall(int node
, gfp_t gfp_mask
)
134 static inline int cpuset_zone_allowed_softwall(struct zone
*z
, gfp_t gfp_mask
)
139 static inline int cpuset_zone_allowed_hardwall(struct zone
*z
, gfp_t gfp_mask
)
144 static inline int cpuset_mems_allowed_intersects(const struct task_struct
*tsk1
,
145 const struct task_struct
*tsk2
)
150 static inline void cpuset_memory_pressure_bump(void) {}
152 static inline void cpuset_task_status_allowed(struct seq_file
*m
,
153 struct task_struct
*task
)
157 static inline int cpuset_mem_spread_node(void)
162 static inline int cpuset_do_page_mem_spread(void)
167 static inline int cpuset_do_slab_mem_spread(void)
172 static inline int current_cpuset_is_being_rebound(void)
177 static inline void rebuild_sched_domains(void)
179 partition_sched_domains(1, NULL
, NULL
);
182 static inline void cpuset_print_task_mems_allowed(struct task_struct
*p
)
186 static inline void set_mems_allowed(nodemask_t nodemask
)
190 #endif /* !CONFIG_CPUSETS */
192 #endif /* _LINUX_CPUSET_H */