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 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(struct zone *z, gfp_t gfp_mask);
33 static int inline cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
35 return number_of_cpusets <= 1 || __cpuset_zone_allowed(z, gfp_mask);
38 extern int cpuset_excl_nodes_overlap(const struct task_struct *p);
40 #define cpuset_memory_pressure_bump() \
42 if (cpuset_memory_pressure_enabled) \
43 __cpuset_memory_pressure_bump(); \
45 extern int cpuset_memory_pressure_enabled;
46 extern void __cpuset_memory_pressure_bump(void);
48 extern struct file_operations proc_cpuset_operations;
49 extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer);
51 extern void cpuset_lock(void);
52 extern void cpuset_unlock(void);
54 extern int cpuset_mem_spread_node(void);
56 static inline int cpuset_do_page_mem_spread(void)
58 return current->flags & PF_SPREAD_PAGE;
61 static inline int cpuset_do_slab_mem_spread(void)
63 return current->flags & PF_SPREAD_SLAB;
66 #else /* !CONFIG_CPUSETS */
68 static inline int cpuset_init_early(void) { return 0; }
69 static inline int cpuset_init(void) { return 0; }
70 static inline void cpuset_init_smp(void) {}
71 static inline void cpuset_fork(struct task_struct *p) {}
72 static inline void cpuset_exit(struct task_struct *p) {}
74 static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
76 return cpu_possible_map;
79 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
81 return node_possible_map;
84 static inline void cpuset_init_current_mems_allowed(void) {}
85 static inline void cpuset_update_task_memory_state(void) {}
86 #define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
88 static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
93 static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
98 static inline int cpuset_excl_nodes_overlap(const struct task_struct *p)
103 static inline void cpuset_memory_pressure_bump(void) {}
105 static inline char *cpuset_task_status_allowed(struct task_struct *task,
111 static inline void cpuset_lock(void) {}
112 static inline void cpuset_unlock(void) {}
114 static inline int cpuset_mem_spread_node(void)
119 static inline int cpuset_do_page_mem_spread(void)
124 static inline int cpuset_do_slab_mem_spread(void)
129 #endif /* !CONFIG_CPUSETS */
131 #endif /* _LINUX_CPUSET_H */