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 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 #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_excl_nodes_overlap(const struct task_struct *p); 49 50 #define cpuset_memory_pressure_bump() \ 51 do { \ 52 if (cpuset_memory_pressure_enabled) \ 53 __cpuset_memory_pressure_bump(); \ 54 } while (0) 55 extern int cpuset_memory_pressure_enabled; 56 extern void __cpuset_memory_pressure_bump(void); 57 58 extern const struct file_operations proc_cpuset_operations; 59 extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer); 60 61 extern void cpuset_lock(void); 62 extern void cpuset_unlock(void); 63 64 extern int cpuset_mem_spread_node(void); 65 66 static inline int cpuset_do_page_mem_spread(void) 67 { 68 return current->flags & PF_SPREAD_PAGE; 69 } 70 71 static inline int cpuset_do_slab_mem_spread(void) 72 { 73 return current->flags & PF_SPREAD_SLAB; 74 } 75 76 extern void cpuset_track_online_nodes(void); 77 78 #else /* !CONFIG_CPUSETS */ 79 80 static inline int cpuset_init_early(void) { return 0; } 81 static inline int cpuset_init(void) { return 0; } 82 static inline void cpuset_init_smp(void) {} 83 static inline void cpuset_fork(struct task_struct *p) {} 84 static inline void cpuset_exit(struct task_struct *p) {} 85 86 static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p) 87 { 88 return cpu_possible_map; 89 } 90 91 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p) 92 { 93 return node_possible_map; 94 } 95 96 #define cpuset_current_mems_allowed (node_online_map) 97 static inline void cpuset_init_current_mems_allowed(void) {} 98 static inline void cpuset_update_task_memory_state(void) {} 99 #define cpuset_nodes_subset_current_mems_allowed(nodes) (1) 100 101 static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl) 102 { 103 return 1; 104 } 105 106 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) 107 { 108 return 1; 109 } 110 111 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) 112 { 113 return 1; 114 } 115 116 static inline int cpuset_excl_nodes_overlap(const struct task_struct *p) 117 { 118 return 1; 119 } 120 121 static inline void cpuset_memory_pressure_bump(void) {} 122 123 static inline char *cpuset_task_status_allowed(struct task_struct *task, 124 char *buffer) 125 { 126 return buffer; 127 } 128 129 static inline void cpuset_lock(void) {} 130 static inline void cpuset_unlock(void) {} 131 132 static inline int cpuset_mem_spread_node(void) 133 { 134 return 0; 135 } 136 137 static inline int cpuset_do_page_mem_spread(void) 138 { 139 return 0; 140 } 141 142 static inline int cpuset_do_slab_mem_spread(void) 143 { 144 return 0; 145 } 146 147 static inline void cpuset_track_online_nodes(void) {} 148 149 #endif /* !CONFIG_CPUSETS */ 150 151 #endif /* _LINUX_CPUSET_H */ 152