1 #ifndef _LINUX_CPUSET_H
2 #define _LINUX_CPUSET_H
6 * Copyright (C) 2003 BULL SA
7 * Copyright (C) 2004 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(void);
20 extern void cpuset_init_smp(void);
21 extern void cpuset_fork(struct task_struct *p);
22 extern void cpuset_exit(struct task_struct *p);
23 extern cpumask_t cpuset_cpus_allowed(struct task_struct *p);
24 extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
25 void cpuset_init_current_mems_allowed(void);
26 void cpuset_update_task_memory_state(void);
27 #define cpuset_nodes_subset_current_mems_allowed(nodes) \
28 nodes_subset((nodes), current->mems_allowed)
29 int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl);
31 extern int __cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask);
32 static int inline cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
34 return number_of_cpusets <= 1 || __cpuset_zone_allowed(z, gfp_mask);
37 extern int cpuset_excl_nodes_overlap(const struct task_struct *p);
39 #define cpuset_memory_pressure_bump() \
41 if (cpuset_memory_pressure_enabled) \
42 __cpuset_memory_pressure_bump(); \
44 extern int cpuset_memory_pressure_enabled;
45 extern void __cpuset_memory_pressure_bump(void);
47 extern struct file_operations proc_cpuset_operations;
48 extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer);
50 #else /* !CONFIG_CPUSETS */
52 static inline int cpuset_init(void) { return 0; }
53 static inline void cpuset_init_smp(void) {}
54 static inline void cpuset_fork(struct task_struct *p) {}
55 static inline void cpuset_exit(struct task_struct *p) {}
57 static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
59 return cpu_possible_map;
62 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
64 return node_possible_map;
67 static inline void cpuset_init_current_mems_allowed(void) {}
68 static inline void cpuset_update_task_memory_state(void) {}
69 #define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
71 static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
76 static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask)
81 static inline int cpuset_excl_nodes_overlap(const struct task_struct *p)
86 static inline void cpuset_memory_pressure_bump(void) {}
88 static inline char *cpuset_task_status_allowed(struct task_struct *task,
94 #endif /* !CONFIG_CPUSETS */
96 #endif /* _LINUX_CPUSET_H */