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 #include <linux/mm.h> 16 17 #ifdef CONFIG_CPUSETS 18 19 extern int number_of_cpusets; /* How many cpusets are defined in system? */ 20 21 extern int cpuset_init(void); 22 extern void cpuset_init_smp(void); 23 extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask); 24 extern void cpuset_cpus_allowed_locked(struct task_struct *p, 25 struct cpumask *mask); 26 extern nodemask_t cpuset_mems_allowed(struct task_struct *p); 27 #define cpuset_current_mems_allowed (current->mems_allowed) 28 void cpuset_init_current_mems_allowed(void); 29 int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask); 30 31 extern int __cpuset_node_allowed_softwall(int node, gfp_t gfp_mask); 32 extern int __cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask); 33 34 static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask) 35 { 36 return number_of_cpusets <= 1 || 37 __cpuset_node_allowed_softwall(node, gfp_mask); 38 } 39 40 static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask) 41 { 42 return number_of_cpusets <= 1 || 43 __cpuset_node_allowed_hardwall(node, gfp_mask); 44 } 45 46 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) 47 { 48 return cpuset_node_allowed_softwall(zone_to_nid(z), gfp_mask); 49 } 50 51 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) 52 { 53 return cpuset_node_allowed_hardwall(zone_to_nid(z), gfp_mask); 54 } 55 56 extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, 57 const struct task_struct *tsk2); 58 59 #define cpuset_memory_pressure_bump() \ 60 do { \ 61 if (cpuset_memory_pressure_enabled) \ 62 __cpuset_memory_pressure_bump(); \ 63 } while (0) 64 extern int cpuset_memory_pressure_enabled; 65 extern void __cpuset_memory_pressure_bump(void); 66 67 extern const struct file_operations proc_cpuset_operations; 68 struct seq_file; 69 extern void cpuset_task_status_allowed(struct seq_file *m, 70 struct task_struct *task); 71 72 extern void cpuset_lock(void); 73 extern void cpuset_unlock(void); 74 75 extern int cpuset_mem_spread_node(void); 76 77 static inline int cpuset_do_page_mem_spread(void) 78 { 79 return current->flags & PF_SPREAD_PAGE; 80 } 81 82 static inline int cpuset_do_slab_mem_spread(void) 83 { 84 return current->flags & PF_SPREAD_SLAB; 85 } 86 87 extern int current_cpuset_is_being_rebound(void); 88 89 extern void rebuild_sched_domains(void); 90 91 extern void cpuset_print_task_mems_allowed(struct task_struct *p); 92 93 static inline void set_mems_allowed(nodemask_t nodemask) 94 { 95 current->mems_allowed = nodemask; 96 } 97 98 #else /* !CONFIG_CPUSETS */ 99 100 static inline int cpuset_init(void) { return 0; } 101 static inline void cpuset_init_smp(void) {} 102 103 static inline void cpuset_cpus_allowed(struct task_struct *p, 104 struct cpumask *mask) 105 { 106 cpumask_copy(mask, cpu_possible_mask); 107 } 108 static inline void cpuset_cpus_allowed_locked(struct task_struct *p, 109 struct cpumask *mask) 110 { 111 cpumask_copy(mask, cpu_possible_mask); 112 } 113 114 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p) 115 { 116 return node_possible_map; 117 } 118 119 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY]) 120 static inline void cpuset_init_current_mems_allowed(void) {} 121 122 static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask) 123 { 124 return 1; 125 } 126 127 static inline int cpuset_node_allowed_softwall(int node, gfp_t gfp_mask) 128 { 129 return 1; 130 } 131 132 static inline int cpuset_node_allowed_hardwall(int node, gfp_t gfp_mask) 133 { 134 return 1; 135 } 136 137 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) 138 { 139 return 1; 140 } 141 142 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) 143 { 144 return 1; 145 } 146 147 static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, 148 const struct task_struct *tsk2) 149 { 150 return 1; 151 } 152 153 static inline void cpuset_memory_pressure_bump(void) {} 154 155 static inline void cpuset_task_status_allowed(struct seq_file *m, 156 struct task_struct *task) 157 { 158 } 159 160 static inline void cpuset_lock(void) {} 161 static inline void cpuset_unlock(void) {} 162 163 static inline int cpuset_mem_spread_node(void) 164 { 165 return 0; 166 } 167 168 static inline int cpuset_do_page_mem_spread(void) 169 { 170 return 0; 171 } 172 173 static inline int cpuset_do_slab_mem_spread(void) 174 { 175 return 0; 176 } 177 178 static inline int current_cpuset_is_being_rebound(void) 179 { 180 return 0; 181 } 182 183 static inline void rebuild_sched_domains(void) 184 { 185 partition_sched_domains(1, NULL, NULL); 186 } 187 188 static inline void cpuset_print_task_mems_allowed(struct task_struct *p) 189 { 190 } 191 192 static inline void set_mems_allowed(nodemask_t nodemask) 193 { 194 } 195 196 #endif /* !CONFIG_CPUSETS */ 197 198 #endif /* _LINUX_CPUSET_H */ 199