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 17extern int number_of_cpusets; /* How many cpusets are defined in system? */ 18 19extern int cpuset_init_early(void); 20extern int cpuset_init(void); 21extern void cpuset_init_smp(void); 22extern void cpuset_fork(struct task_struct *p); 23extern void cpuset_exit(struct task_struct *p); 24extern cpumask_t cpuset_cpus_allowed(struct task_struct *p); 25extern nodemask_t cpuset_mems_allowed(struct task_struct *p); 26#define cpuset_current_mems_allowed (current->mems_allowed) 27void cpuset_init_current_mems_allowed(void); 28void cpuset_update_task_memory_state(void); 29#define cpuset_nodes_subset_current_mems_allowed(nodes) \ 30 nodes_subset((nodes), current->mems_allowed) 31int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl); 32 33extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask); 34extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask); 35 36static 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 42static 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 48extern 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) 55extern int cpuset_memory_pressure_enabled; 56extern void __cpuset_memory_pressure_bump(void); 57 58extern const struct file_operations proc_cpuset_operations; 59extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer); 60 61extern void cpuset_lock(void); 62extern void cpuset_unlock(void); 63 64extern int cpuset_mem_spread_node(void); 65 66static inline int cpuset_do_page_mem_spread(void) 67{ 68 return current->flags & PF_SPREAD_PAGE; 69} 70 71static inline int cpuset_do_slab_mem_spread(void) 72{ 73 return current->flags & PF_SPREAD_SLAB; 74} 75 76extern void cpuset_track_online_nodes(void); 77 78#else /* !CONFIG_CPUSETS */ 79 80static inline int cpuset_init_early(void) { return 0; } 81static inline int cpuset_init(void) { return 0; } 82static inline void cpuset_init_smp(void) {} 83static inline void cpuset_fork(struct task_struct *p) {} 84static inline void cpuset_exit(struct task_struct *p) {} 85 86static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p) 87{ 88 return cpu_possible_map; 89} 90 91static 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) 97static inline void cpuset_init_current_mems_allowed(void) {} 98static inline void cpuset_update_task_memory_state(void) {} 99#define cpuset_nodes_subset_current_mems_allowed(nodes) (1) 100 101static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl) 102{ 103 return 1; 104} 105 106static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) 107{ 108 return 1; 109} 110 111static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) 112{ 113 return 1; 114} 115 116static inline int cpuset_excl_nodes_overlap(const struct task_struct *p) 117{ 118 return 1; 119} 120 121static inline void cpuset_memory_pressure_bump(void) {} 122 123static inline char *cpuset_task_status_allowed(struct task_struct *task, 124 char *buffer) 125{ 126 return buffer; 127} 128 129static inline void cpuset_lock(void) {} 130static inline void cpuset_unlock(void) {} 131 132static inline int cpuset_mem_spread_node(void) 133{ 134 return 0; 135} 136 137static inline int cpuset_do_page_mem_spread(void) 138{ 139 return 0; 140} 141 142static inline int cpuset_do_slab_mem_spread(void) 143{ 144 return 0; 145} 146 147static inline void cpuset_track_online_nodes(void) {} 148 149static inline cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p) 150{ 151 return cpu_possible_map; 152} 153 154#endif /* !CONFIG_CPUSETS */ 155 156#endif /* _LINUX_CPUSET_H */ 157