include/linux/cpuset.h

   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, 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 void cpuset_update_task_memory_state(void);
  30 int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
  31
  32 extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
  33 extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
  34
  35 static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
  36 {
  37         return number_of_cpusets <= 1 ||
  38                 __cpuset_zone_allowed_softwall(z, gfp_mask);
  39 }
  40
  41 static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
  42 {
  43         return number_of_cpusets <= 1 ||
  44                 __cpuset_zone_allowed_hardwall(z, gfp_mask);
  45 }
  46
  47 extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
  48                                           const struct task_struct *tsk2);
  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 struct seq_file;
  60 extern void cpuset_task_status_allowed(struct seq_file *m,
  61                                         struct task_struct *task);
  62
  63 extern void cpuset_lock(void);
  64 extern void cpuset_unlock(void);
  65
  66 extern int cpuset_mem_spread_node(void);
  67
  68 static inline int cpuset_do_page_mem_spread(void)
  69 {
  70         return current->flags & PF_SPREAD_PAGE;
  71 }
  72
  73 static inline int cpuset_do_slab_mem_spread(void)
  74 {
  75         return current->flags & PF_SPREAD_SLAB;
  76 }
  77
  78 extern int current_cpuset_is_being_rebound(void);
  79
  80 extern void rebuild_sched_domains(void);
  81
  82 extern void cpuset_print_task_mems_allowed(struct task_struct *p);
  83
  84 #else /* !CONFIG_CPUSETS */
  85
  86 static inline int cpuset_init_early(void) { return 0; }
  87 static inline int cpuset_init(void) { return 0; }
  88 static inline void cpuset_init_smp(void) {}
  89
  90 static inline void cpuset_cpus_allowed(struct task_struct *p,
  91                                        struct cpumask *mask)
  92 {
  93         *mask = cpu_possible_map;
  94 }
  95 static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
  96                                               struct cpumask *mask)
  97 {
  98         *mask = cpu_possible_map;
  99 }
 100
 101 static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
 102 {
 103         return node_possible_map;
 104 }
 105
 106 #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
 107 static inline void cpuset_init_current_mems_allowed(void) {}
 108 static inline void cpuset_update_task_memory_state(void) {}
 109
 110 static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
 111 {
 112         return 1;
 113 }
 114
 115 static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
 116 {
 117         return 1;
 118 }
 119
 120 static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
 121 {
 122         return 1;
 123 }
 124
 125 static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
 126                                                  const struct task_struct *tsk2)
 127 {
 128         return 1;
 129 }
 130
 131 static inline void cpuset_memory_pressure_bump(void) {}
 132
 133 static inline void cpuset_task_status_allowed(struct seq_file *m,
 134                                                 struct task_struct *task)
 135 {
 136 }
 137
 138 static inline void cpuset_lock(void) {}
 139 static inline void cpuset_unlock(void) {}
 140
 141 static inline int cpuset_mem_spread_node(void)
 142 {
 143         return 0;
 144 }
 145
 146 static inline int cpuset_do_page_mem_spread(void)
 147 {
 148         return 0;
 149 }
 150
 151 static inline int cpuset_do_slab_mem_spread(void)
 152 {
 153         return 0;
 154 }
 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(1, NULL, NULL);
 164 }
 165
 166 static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
 167 {
 168 }
 169
 170 #endif /* !CONFIG_CPUSETS */
 171
 172 #endif /* _LINUX_CPUSET_H */