Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 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 | |
Paul Jackson | 202f72d | 2006-01-08 01:01:57 -0800 | [diff] [blame] | 17 | extern int number_of_cpusets; /* How many cpusets are defined in system? */ |
| 18 | |
Paul Jackson | c417f02 | 2006-01-08 01:02:01 -0800 | [diff] [blame] | 19 | extern int cpuset_init_early(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Paul Jackson | 909d75a | 2006-01-08 01:01:55 -0800 | [diff] [blame] | 24 | extern cpumask_t cpuset_cpus_allowed(struct task_struct *p); |
| 25 | extern nodemask_t cpuset_mems_allowed(struct task_struct *p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | void cpuset_init_current_mems_allowed(void); |
Paul Jackson | cf2a473c | 2006-01-08 01:01:54 -0800 | [diff] [blame] | 27 | void cpuset_update_task_memory_state(void); |
Paul Jackson | 5966514 | 2006-01-08 01:01:47 -0800 | [diff] [blame] | 28 | #define cpuset_nodes_subset_current_mems_allowed(nodes) \ |
| 29 | nodes_subset((nodes), current->mems_allowed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl); |
Paul Jackson | 202f72d | 2006-01-08 01:01:57 -0800 | [diff] [blame] | 31 | |
| 32 | extern int __cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask); |
| 33 | static int inline cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) |
| 34 | { |
| 35 | return number_of_cpusets <= 1 || __cpuset_zone_allowed(z, gfp_mask); |
| 36 | } |
| 37 | |
Paul Jackson | ef08e3b | 2005-09-06 15:18:13 -0700 | [diff] [blame] | 38 | extern int cpuset_excl_nodes_overlap(const struct task_struct *p); |
Paul Jackson | 3e0d98b | 2006-01-08 01:01:49 -0800 | [diff] [blame] | 39 | |
| 40 | #define cpuset_memory_pressure_bump() \ |
| 41 | do { \ |
| 42 | if (cpuset_memory_pressure_enabled) \ |
| 43 | __cpuset_memory_pressure_bump(); \ |
| 44 | } while (0) |
| 45 | extern int cpuset_memory_pressure_enabled; |
| 46 | extern void __cpuset_memory_pressure_bump(void); |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | extern struct file_operations proc_cpuset_operations; |
| 49 | extern char *cpuset_task_status_allowed(struct task_struct *task, char *buffer); |
| 50 | |
Paul Jackson | 505970b | 2006-01-14 13:21:06 -0800 | [diff] [blame] | 51 | extern void cpuset_lock(void); |
| 52 | extern void cpuset_unlock(void); |
| 53 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | #else /* !CONFIG_CPUSETS */ |
| 55 | |
Paul Jackson | c417f02 | 2006-01-08 01:02:01 -0800 | [diff] [blame] | 56 | static inline int cpuset_init_early(void) { return 0; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | static inline int cpuset_init(void) { return 0; } |
| 58 | static inline void cpuset_init_smp(void) {} |
| 59 | static inline void cpuset_fork(struct task_struct *p) {} |
| 60 | static inline void cpuset_exit(struct task_struct *p) {} |
| 61 | |
| 62 | static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p) |
| 63 | { |
| 64 | return cpu_possible_map; |
| 65 | } |
| 66 | |
Paul Jackson | 909d75a | 2006-01-08 01:01:55 -0800 | [diff] [blame] | 67 | static inline nodemask_t cpuset_mems_allowed(struct task_struct *p) |
| 68 | { |
| 69 | return node_possible_map; |
| 70 | } |
| 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | static inline void cpuset_init_current_mems_allowed(void) {} |
Paul Jackson | cf2a473c | 2006-01-08 01:01:54 -0800 | [diff] [blame] | 73 | static inline void cpuset_update_task_memory_state(void) {} |
Paul Jackson | 5966514 | 2006-01-08 01:01:47 -0800 | [diff] [blame] | 74 | #define cpuset_nodes_subset_current_mems_allowed(nodes) (1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
| 76 | static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl) |
| 77 | { |
| 78 | return 1; |
| 79 | } |
| 80 | |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 81 | static inline int cpuset_zone_allowed(struct zone *z, gfp_t gfp_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | { |
| 83 | return 1; |
| 84 | } |
| 85 | |
Paul Jackson | ef08e3b | 2005-09-06 15:18:13 -0700 | [diff] [blame] | 86 | static inline int cpuset_excl_nodes_overlap(const struct task_struct *p) |
| 87 | { |
| 88 | return 1; |
| 89 | } |
| 90 | |
Paul Jackson | 3e0d98b | 2006-01-08 01:01:49 -0800 | [diff] [blame] | 91 | static inline void cpuset_memory_pressure_bump(void) {} |
| 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | static inline char *cpuset_task_status_allowed(struct task_struct *task, |
| 94 | char *buffer) |
| 95 | { |
| 96 | return buffer; |
| 97 | } |
| 98 | |
Paul Jackson | 505970b | 2006-01-14 13:21:06 -0800 | [diff] [blame] | 99 | static inline void cpuset_lock(void) {} |
| 100 | static inline void cpuset_unlock(void) {} |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | #endif /* !CONFIG_CPUSETS */ |
| 103 | |
| 104 | #endif /* _LINUX_CPUSET_H */ |