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>
17 extern int number_of_cpusets; /* How many cpusets are defined in system? */
19 extern int cpuset_init_early(void);
20 extern int cpuset_init(void);
21 extern void cpuset_init_smp(void);
22 extern void cpuset_fork(struct task_struct *p);
23 extern void cpuset_exit(struct task_struct *p);
24 extern cpumask_t cpuset_cpus_allowed(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_excl_nodes_overlap(const struct task_struct *p);
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 #else /* !CONFIG_CPUSETS */
80 static inline int cpuset_init_early(void) { return 0; }
81 static inline int cpuset_init(void) { return 0; }
82 static inline void cpuset_init_smp(void) {}
83 static inline void cpuset_fork(struct task_struct *p) {}
84 static inline void cpuset_exit(struct task_struct *p) {}
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_online_map)
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_excl_nodes_overlap(const struct task_struct *p)
121 static inline void cpuset_memory_pressure_bump(void) {}
123 static inline char *cpuset_task_status_allowed(struct task_struct *task,
129 static inline void cpuset_lock(void) {}
130 static inline void cpuset_unlock(void) {}
132 static inline int cpuset_mem_spread_node(void)
137 static inline int cpuset_do_page_mem_spread(void)
142 static inline int cpuset_do_slab_mem_spread(void)
147 static inline void cpuset_track_online_nodes(void) {}
149 #endif /* !CONFIG_CPUSETS */
151 #endif /* _LINUX_CPUSET_H */