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 nodemask_t cpuset_mems_allowed(struct task_struct *p);
25 #define cpuset_current_mems_allowed (current->mems_allowed)
26 void cpuset_init_current_mems_allowed(void);
27 void cpuset_update_task_memory_state(void);
28 #define cpuset_nodes_subset_current_mems_allowed(nodes) \
29 nodes_subset((nodes), current->mems_allowed)
30 int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl);
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;
59 extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer);
61 extern void cpuset_lock(void);
62 extern void cpuset_unlock(void);
64 extern int cpuset_mem_spread_node(void);
66 static inline int cpuset_do_page_mem_spread(void)
68 return current->flags & PF_SPREAD_PAGE;
71 static inline int cpuset_do_slab_mem_spread(void)
73 return current->flags & PF_SPREAD_SLAB;
76 extern void cpuset_track_online_nodes(void);
78 extern int current_cpuset_is_being_rebound(void);
80 #else /* !CONFIG_CPUSETS */
82 static inline int cpuset_init_early(void) { return 0; }
83 static inline int cpuset_init(void) { return 0; }
84 static inline void cpuset_init_smp(void) {}
86 static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
88 return cpu_possible_map;
91 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
93 return node_possible_map;
96 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
97 static inline void cpuset_init_current_mems_allowed(void) {}
98 static inline void cpuset_update_task_memory_state(void) {}
99 #define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
101 static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
106 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
111 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
116 static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
117 const struct task_struct *tsk2)
122 static inline void cpuset_memory_pressure_bump(void) {}
124 static inline char *cpuset_task_status_allowed(struct task_struct *task,
130 static inline void cpuset_lock(void) {}
131 static inline void cpuset_unlock(void) {}
133 static inline int cpuset_mem_spread_node(void)
138 static inline int cpuset_do_page_mem_spread(void)
143 static inline int cpuset_do_slab_mem_spread(void)
148 static inline void cpuset_track_online_nodes(void) {}
150 static inline int current_cpuset_is_being_rebound(void)
155 #endif /* !CONFIG_CPUSETS */
157 #endif /* _LINUX_CPUSET_H */