1 #ifndef _LINUX_CPUSET_H 2 #define _LINUX_CPUSET_H 3 /* 4 * cpuset interface 5 * 6 * Copyright (C) 2003 BULL SA 7 * Copyright (C) 2004-2006 Silicon Graphics, Inc. 8 * 9 */ 10 11 #include <linux/sched.h> 12 #include <linux/cpumask.h> 13 #include <linux/nodemask.h> 14 #include <linux/cgroup.h> 15 16 #ifdef CONFIG_CPUSETS 17 18 extern int number_of_cpusets; /* How many cpusets are defined in system? */ 19 20 extern int cpuset_init_early(void); 21 extern int cpuset_init(void); 22 extern void cpuset_init_smp(void); 23 extern void cpuset_cpus_allowed(struct task_struct *p, cpumask_t *mask); 24 extern void cpuset_cpus_allowed_locked(struct task_struct *p, cpumask_t *mask); 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 int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask); 30 31 extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask); 32 extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask); 33 34 static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) 35 { 36 return number_of_cpusets <= 1 || 37 __cpuset_zone_allowed_softwall(z, gfp_mask); 38 } 39 40 static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) 41 { 42 return number_of_cpusets <= 1 || 43 __cpuset_zone_allowed_hardwall(z, gfp_mask); 44 } 45 46 extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, 47 const struct task_struct *tsk2); 48 49 #define cpuset_memory_pressure_bump() \ 50 do { \ 51 if (cpuset_memory_pressure_enabled) \ 52 __cpuset_memory_pressure_bump(); \ 53 } while (0) 54 extern int cpuset_memory_pressure_enabled; 55 extern void __cpuset_memory_pressure_bump(void); 56 57 extern const struct file_operations proc_cpuset_operations; 58 struct seq_file; 59 extern void cpuset_task_status_allowed(struct seq_file *m, 60 struct task_struct *task); 61 62 extern void cpuset_lock(void); 63 extern void cpuset_unlock(void); 64 65 extern int cpuset_mem_spread_node(void); 66 67 static inline int cpuset_do_page_mem_spread(void) 68 { 69 return current->flags & PF_SPREAD_PAGE; 70 } 71 72 static inline int cpuset_do_slab_mem_spread(void) 73 { 74 return current->flags & PF_SPREAD_SLAB; 75 } 76 77 extern void cpuset_track_online_nodes(void); 78 79 extern int current_cpuset_is_being_rebound(void); 80 81 extern void rebuild_sched_domains(void); 82 83 #else /* !CONFIG_CPUSETS */ 84 85 static inline int cpuset_init_early(void) { return 0; } 86 static inline int cpuset_init(void) { return 0; } 87 static inline void cpuset_init_smp(void) {} 88 89 static inline void cpuset_cpus_allowed(struct task_struct *p, cpumask_t *mask) 90 { 91 *mask = cpu_possible_map; 92 } 93 static inline void cpuset_cpus_allowed_locked(struct task_struct *p, 94 cpumask_t *mask) 95 { 96 *mask = cpu_possible_map; 97 } 98 99 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p) 100 { 101 return node_possible_map; 102 } 103 104 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY]) 105 static inline void cpuset_init_current_mems_allowed(void) {} 106 static inline void cpuset_update_task_memory_state(void) {} 107 108 static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask) 109 { 110 return 1; 111 } 112 113 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) 114 { 115 return 1; 116 } 117 118 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) 119 { 120 return 1; 121 } 122 123 static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, 124 const struct task_struct *tsk2) 125 { 126 return 1; 127 } 128 129 static inline void cpuset_memory_pressure_bump(void) {} 130 131 static inline void cpuset_task_status_allowed(struct seq_file *m, 132 struct task_struct *task) 133 { 134 } 135 136 static inline void cpuset_lock(void) {} 137 static inline void cpuset_unlock(void) {} 138 139 static inline int cpuset_mem_spread_node(void) 140 { 141 return 0; 142 } 143 144 static inline int cpuset_do_page_mem_spread(void) 145 { 146 return 0; 147 } 148 149 static inline int cpuset_do_slab_mem_spread(void) 150 { 151 return 0; 152 } 153 154 static inline void cpuset_track_online_nodes(void) {} 155 156 static inline int current_cpuset_is_being_rebound(void) 157 { 158 return 0; 159 } 160 161 static inline void rebuild_sched_domains(void) 162 { 163 partition_sched_domains(0, NULL, NULL); 164 } 165 166 #endif /* !CONFIG_CPUSETS */ 167 168 #endif /* _LINUX_CPUSET_H */ 169