1 #ifndef _LINUX_CPUSET_H 2 #define _LINUX_CPUSET_H 3 /* 4 * cpuset interface 5 * 6 * Copyright (C) 2003 BULL SA 7 * Copyright (C) 2004 Silicon Graphics, Inc. 8 * 9 */ 10 11 #include <linux/sched.h> 12 #include <linux/cpumask.h> 13 #include <linux/nodemask.h> 14 15 #ifdef CONFIG_CPUSETS 16 17 extern int number_of_cpusets; /* How many cpusets are defined in system? */ 18 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); 31 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) 34 { 35 return number_of_cpusets <= 1 || __cpuset_zone_allowed(z, gfp_mask); 36 } 37 38 extern int cpuset_excl_nodes_overlap(const struct task_struct *p); 39 40 #define cpuset_memory_pressure_bump() \ 41 do { \ 42 if (cpuset_memory_pressure_enabled) \ 43 __cpuset_memory_pressure_bump(); \ 44 } while (0) 45 extern int cpuset_memory_pressure_enabled; 46 extern void __cpuset_memory_pressure_bump(void); 47 48 extern struct file_operations proc_cpuset_operations; 49 extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer); 50 51 extern void cpuset_lock(void); 52 extern void cpuset_unlock(void); 53 54 #else /* !CONFIG_CPUSETS */ 55 56 static inline int cpuset_init_early(void) { return 0; } 57 static inline int cpuset_init(void) { return 0; } 58 static inline void cpuset_init_smp(void) {} 59 static inline void cpuset_fork(struct task_struct *p) {} 60 static inline void cpuset_exit(struct task_struct *p) {} 61 62 static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p) 63 { 64 return cpu_possible_map; 65 } 66 67 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p) 68 { 69 return node_possible_map; 70 } 71 72 static inline void cpuset_init_current_mems_allowed(void) {} 73 static inline void cpuset_update_task_memory_state(void) {} 74 #define cpuset_nodes_subset_current_mems_allowed(nodes) (1) 75 76 static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl) 77 { 78 return 1; 79 } 80 81 static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) 82 { 83 return 1; 84 } 85 86 static inline int cpuset_excl_nodes_overlap(const struct task_struct *p) 87 { 88 return 1; 89 } 90 91 static inline void cpuset_memory_pressure_bump(void) {} 92 93 static inline char *cpuset_task_status_allowed(struct task_struct *task, 94 char *buffer) 95 { 96 return buffer; 97 } 98 99 static inline void cpuset_lock(void) {} 100 static inline void cpuset_unlock(void) {} 101 102 #endif /* !CONFIG_CPUSETS */ 103 104 #endif /* _LINUX_CPUSET_H */ 105