LXR linux/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
  18extern int number_of_cpusets;   /* How many cpusets are defined in system? */
  19
  20extern int cpuset_init_early(void);
  21extern int cpuset_init(void);
  22extern void cpuset_init_smp(void);
  23extern void cpuset_cpus_allowed(struct task_struct *p, struct cpumask *mask);
  24extern void cpuset_cpus_allowed_locked(struct task_struct *p,
  25                                       struct cpumask *mask);
  26extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
  27#define cpuset_current_mems_allowed (current->mems_allowed)
  28void cpuset_init_current_mems_allowed(void);
  29void cpuset_update_task_memory_state(void);
  30int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
  31
  32extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
  33extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
  34
  35static 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
  41static 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
  47extern 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)
  55extern int cpuset_memory_pressure_enabled;
  56extern void __cpuset_memory_pressure_bump(void);
  57
  58extern const struct file_operations proc_cpuset_operations;
  59struct seq_file;
  60extern void cpuset_task_status_allowed(struct seq_file *m,
  61                                        struct task_struct *task);
  62
  63extern void cpuset_lock(void);
  64extern void cpuset_unlock(void);
  65
  66extern int cpuset_mem_spread_node(void);
  67
  68static inline int cpuset_do_page_mem_spread(void)
  69{
  70        return current->flags & PF_SPREAD_PAGE;
  71}
  72
  73static inline int cpuset_do_slab_mem_spread(void)
  74{
  75        return current->flags & PF_SPREAD_SLAB;
  76}
  77
  78extern int current_cpuset_is_being_rebound(void);
  79
  80extern void rebuild_sched_domains(void);
  81
  82extern void cpuset_print_task_mems_allowed(struct task_struct *p);
  83
  84#else /* !CONFIG_CPUSETS */
  85
  86static inline int cpuset_init_early(void) { return 0; }
  87static inline int cpuset_init(void) { return 0; }
  88static inline void cpuset_init_smp(void) {}
  89
  90static inline void cpuset_cpus_allowed(struct task_struct *p,
  91                                       struct cpumask *mask)
  92{
  93        *mask = cpu_possible_map;
  94}
  95static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
  96                                              struct cpumask *mask)
  97{
  98        *mask = cpu_possible_map;
  99}
 100
 101static 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])
 107static inline void cpuset_init_current_mems_allowed(void) {}
 108static inline void cpuset_update_task_memory_state(void) {}
 109
 110static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
 111{
 112        return 1;
 113}
 114
 115static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
 116{
 117        return 1;
 118}
 119
 120static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
 121{
 122        return 1;
 123}
 124
 125static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
 126                                                 const struct task_struct *tsk2)
 127{
 128        return 1;
 129}
 130
 131static inline void cpuset_memory_pressure_bump(void) {}
 132
 133static inline void cpuset_task_status_allowed(struct seq_file *m,
 134                                                struct task_struct *task)
 135{
 136}
 137
 138static inline void cpuset_lock(void) {}
 139static inline void cpuset_unlock(void) {}
 140
 141static inline int cpuset_mem_spread_node(void)
 142{
 143        return 0;
 144}
 145
 146static inline int cpuset_do_page_mem_spread(void)
 147{
 148        return 0;
 149}
 150
 151static inline int cpuset_do_slab_mem_spread(void)
 152{
 153        return 0;
 154}
 155
 156static inline int current_cpuset_is_being_rebound(void)
 157{
 158        return 0;
 159}
 160
 161static inline void rebuild_sched_domains(void)
 162{
 163        partition_sched_domains(1, NULL, NULL);
 164}
 165
 166static inline void cpuset_print_task_mems_allowed(struct task_struct *p)
 167{
 168}
 169
 170#endif /* !CONFIG_CPUSETS */
 171
 172#endif /* _LINUX_CPUSET_H */
 173