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 cpumask_t cpuset_cpus_allowed(struct task_struct *p); 24 extern cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p); 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 #define cpuset_nodes_subset_current_mems_allowed(nodes) \ 30 nodes_subset((nodes), current->mems_allowed) 31 int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl); 32 33 extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask); 34 extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask); 35 36 static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) 37 { 38 return number_of_cpusets <= 1 || 39 __cpuset_zone_allowed_softwall(z, gfp_mask); 40 } 41 42 static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) 43 { 44 return number_of_cpusets <= 1 || 45 __cpuset_zone_allowed_hardwall(z, gfp_mask); 46 } 47 48 extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, 49 const struct task_struct *tsk2); 50 51 #define cpuset_memory_pressure_bump() \ 52 do { \ 53 if (cpuset_memory_pressure_enabled) \ 54 __cpuset_memory_pressure_bump(); \ 55 } while (0) 56 extern int cpuset_memory_pressure_enabled; 57 extern void __cpuset_memory_pressure_bump(void); 58 59 extern const struct file_operations proc_cpuset_operations; 60 extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer); 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 #else /* !CONFIG_CPUSETS */ 82 83 static inline int cpuset_init_early(void) { return 0; } 84 static inline int cpuset_init(void) { return 0; } 85 static inline void cpuset_init_smp(void) {} 86 87 static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p) 88 { 89 return cpu_possible_map; 90 } 91 static inline cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p) 92 { 93 return cpu_possible_map; 94 } 95 96 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p) 97 { 98 return node_possible_map; 99 } 100 101 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY]) 102 static inline void cpuset_init_current_mems_allowed(void) {} 103 static inline void cpuset_update_task_memory_state(void) {} 104 #define cpuset_nodes_subset_current_mems_allowed(nodes) (1) 105 106 static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl) 107 { 108 return 1; 109 } 110 111 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) 112 { 113 return 1; 114 } 115 116 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) 117 { 118 return 1; 119 } 120 121 static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, 122 const struct task_struct *tsk2) 123 { 124 return 1; 125 } 126 127 static inline void cpuset_memory_pressure_bump(void) {} 128 129 static inline char *cpuset_task_status_allowed(struct task_struct *task, 130 char *buffer) 131 { 132 return buffer; 133 } 134 135 static inline void cpuset_lock(void) {} 136 static inline void cpuset_unlock(void) {} 137 138 static inline int cpuset_mem_spread_node(void) 139 { 140 return 0; 141 } 142 143 static inline int cpuset_do_page_mem_spread(void) 144 { 145 return 0; 146 } 147 148 static inline int cpuset_do_slab_mem_spread(void) 149 { 150 return 0; 151 } 152 153 static inline void cpuset_track_online_nodes(void) {} 154 155 static inline int current_cpuset_is_being_rebound(void) 156 { 157 return 0; 158 } 159 160 #endif /* !CONFIG_CPUSETS */ 161 162 #endif /* _LINUX_CPUSET_H */ 163