#ifndef _LINUX_CPUSET_H #define _LINUX_CPUSET_H /* * cpuset interface * * Copyright (C) 2003 BULL SA * Copyright (C) 2004-2006 Silicon Graphics, Inc. * */ #include <linux/sched.h> #include <linux/cpumask.h> #include <linux/nodemask.h> #ifdef CONFIG_CPUSETS extern int number_of_cpusets; /* How many cpusets are defined in system? */ extern int cpuset_init_early(void); extern int cpuset_init(void); extern void cpuset_init_smp(void); extern void cpuset_fork(struct task_struct *p); extern void cpuset_exit(struct task_struct *p); extern cpumask_t cpuset_cpus_allowed(struct task_struct *p); extern nodemask_t cpuset_mems_allowed(struct task_struct *p); void cpuset_init_current_mems_allowed(void); void cpuset_update_task_memory_state(void); #define cpuset_nodes_subset_current_mems_allowed(nodes) \ nodes_subset((nodes), current->mems_allowed) int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl); extern int __cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask); static int inline cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) { return number_of_cpusets <= 1 || __cpuset_zone_allowed(z, gfp_mask); } extern int cpuset_excl_nodes_overlap(const struct task_struct *p); #define cpuset_memory_pressure_bump() \ do { \ if (cpuset_memory_pressure_enabled) \ __cpuset_memory_pressure_bump(); \ } while (0) extern int cpuset_memory_pressure_enabled; extern void __cpuset_memory_pressure_bump(void); extern struct file_operations proc_cpuset_operations; extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer); extern void cpuset_lock(void); extern void cpuset_unlock(void); extern int cpuset_mem_spread_node(void); static inline int cpuset_do_page_mem_spread(void) { return current->flags & PF_SPREAD_PAGE; } static inline int cpuset_do_slab_mem_spread(void) { return current->flags & PF_SPREAD_SLAB; } extern void cpuset_track_online_nodes(void); #else /* !CONFIG_CPUSETS */ static inline int cpuset_init_early(void) { return 0; } static inline int cpuset_init(void) { return 0; } static inline void cpuset_init_smp(void) {} static inline void cpuset_fork(struct task_struct *p) {} static inline void cpuset_exit(struct task_struct *p) {} static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p) { return cpu_possible_map; } static inline nodemask_t cpuset_mems_allowed(struct task_struct *p) { return node_possible_map; } static inline void cpuset_init_current_mems_allowed(void) {} static inline void cpuset_update_task_memory_state(void) {} #define cpuset_nodes_subset_current_mems_allowed(nodes) (1) static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl) { return 1; } static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) { return 1; } static inline int cpuset_excl_nodes_overlap(const struct task_struct *p) { return 1; } static inline void cpuset_memory_pressure_bump(void) {} static inline char *cpuset_task_status_allowed(struct task_struct *task, char *buffer) { return buffer; } static inline void cpuset_lock(void) {} static inline void cpuset_unlock(void) {} static inline int cpuset_mem_spread_node(void) { return 0; } static inline int cpuset_do_page_mem_spread(void) { return 0; } static inline int cpuset_do_slab_mem_spread(void) { return 0; } static inline void cpuset_track_online_nodes(void) {} #endif /* !CONFIG_CPUSETS */ #endif /* _LINUX_CPUSET_H */