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 |
Paul Jackson | 825a46a | 2006-03-24 03:16:03 -0800 | [diff] [blame] | 7 | * Copyright (C) 2004-2006 Silicon Graphics, Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 9 | */ |
| 10 | |
| 11 | #include <linux/sched.h> |
| 12 | #include <linux/cpumask.h> |
| 13 | #include <linux/nodemask.h> |
Paul Menage | 8793d85 | 2007-10-18 23:39:39 -0700 | [diff] [blame] | 14 | #include <linux/cgroup.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
| 16 | #ifdef CONFIG_CPUSETS |
| 17 | |
Paul Jackson | 202f72d | 2006-01-08 01:01:57 -0800 | [diff] [blame] | 18 | extern int number_of_cpusets; /* How many cpusets are defined in system? */ |
| 19 | |
Paul Jackson | c417f02 | 2006-01-08 01:02:01 -0800 | [diff] [blame] | 20 | extern int cpuset_init_early(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | extern int cpuset_init(void); |
| 22 | extern void cpuset_init_smp(void); |
Paul Jackson | 909d75a | 2006-01-08 01:01:55 -0800 | [diff] [blame] | 23 | extern cpumask_t cpuset_cpus_allowed(struct task_struct *p); |
Cliff Wickman | 470fd64 | 2007-10-18 23:40:46 -0700 | [diff] [blame] | 24 | extern cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p); |
Paul Jackson | 909d75a | 2006-01-08 01:01:55 -0800 | [diff] [blame] | 25 | extern nodemask_t cpuset_mems_allowed(struct task_struct *p); |
Paul Jackson | 9276b1bc | 2006-12-06 20:31:48 -0800 | [diff] [blame] | 26 | #define cpuset_current_mems_allowed (current->mems_allowed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | void cpuset_init_current_mems_allowed(void); |
Paul Jackson | cf2a473 | 2006-01-08 01:01:54 -0800 | [diff] [blame] | 28 | void cpuset_update_task_memory_state(void); |
Paul Jackson | 5966514 | 2006-01-08 01:01:47 -0800 | [diff] [blame] | 29 | #define cpuset_nodes_subset_current_mems_allowed(nodes) \ |
| 30 | nodes_subset((nodes), current->mems_allowed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl); |
Paul Jackson | 202f72d | 2006-01-08 01:01:57 -0800 | [diff] [blame] | 32 | |
Paul Jackson | 02a0e53 | 2006-12-13 00:34:25 -0800 | [diff] [blame] | 33 | extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask); |
| 34 | extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask); |
| 35 | |
| 36 | static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) |
Paul Jackson | 202f72d | 2006-01-08 01:01:57 -0800 | [diff] [blame] | 37 | { |
Paul Jackson | 02a0e53 | 2006-12-13 00:34:25 -0800 | [diff] [blame] | 38 | return number_of_cpusets <= 1 || |
| 39 | __cpuset_zone_allowed_softwall(z, gfp_mask); |
| 40 | } |
| 41 | |
| 42 | static 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); |
Paul Jackson | 202f72d | 2006-01-08 01:01:57 -0800 | [diff] [blame] | 46 | } |
| 47 | |
David Rientjes | bbe373f | 2007-10-16 23:25:58 -0700 | [diff] [blame] | 48 | extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, |
| 49 | const struct task_struct *tsk2); |
Paul Jackson | 3e0d98b | 2006-01-08 01:01:49 -0800 | [diff] [blame] | 50 | |
| 51 | #define cpuset_memory_pressure_bump() \ |
| 52 | do { \ |
| 53 | if (cpuset_memory_pressure_enabled) \ |
| 54 | __cpuset_memory_pressure_bump(); \ |
| 55 | } while (0) |
| 56 | extern int cpuset_memory_pressure_enabled; |
| 57 | extern void __cpuset_memory_pressure_bump(void); |
| 58 | |
Arjan van de Ven | 5404732 | 2007-02-12 00:55:28 -0800 | [diff] [blame] | 59 | extern const struct file_operations proc_cpuset_operations; |
Eric W. Biederman | df5f831 | 2008-02-08 04:18:33 -0800 | [diff] [blame^] | 60 | struct seq_file; |
| 61 | extern void cpuset_task_status_allowed(struct seq_file *m, |
| 62 | struct task_struct *task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Paul Jackson | 505970b | 2006-01-14 13:21:06 -0800 | [diff] [blame] | 64 | extern void cpuset_lock(void); |
| 65 | extern void cpuset_unlock(void); |
| 66 | |
Paul Jackson | 825a46a | 2006-03-24 03:16:03 -0800 | [diff] [blame] | 67 | extern int cpuset_mem_spread_node(void); |
| 68 | |
| 69 | static inline int cpuset_do_page_mem_spread(void) |
| 70 | { |
| 71 | return current->flags & PF_SPREAD_PAGE; |
| 72 | } |
| 73 | |
| 74 | static inline int cpuset_do_slab_mem_spread(void) |
| 75 | { |
| 76 | return current->flags & PF_SPREAD_SLAB; |
| 77 | } |
| 78 | |
Paul Jackson | 38837fc | 2006-09-29 02:01:16 -0700 | [diff] [blame] | 79 | extern void cpuset_track_online_nodes(void); |
| 80 | |
Paul Menage | 8793d85 | 2007-10-18 23:39:39 -0700 | [diff] [blame] | 81 | extern int current_cpuset_is_being_rebound(void); |
| 82 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #else /* !CONFIG_CPUSETS */ |
| 84 | |
Paul Jackson | c417f02 | 2006-01-08 01:02:01 -0800 | [diff] [blame] | 85 | static inline int cpuset_init_early(void) { return 0; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | static inline int cpuset_init(void) { return 0; } |
| 87 | static inline void cpuset_init_smp(void) {} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
| 89 | static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p) |
| 90 | { |
| 91 | return cpu_possible_map; |
| 92 | } |
Cliff Wickman | 470fd64 | 2007-10-18 23:40:46 -0700 | [diff] [blame] | 93 | static inline cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p) |
| 94 | { |
| 95 | return cpu_possible_map; |
| 96 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
Paul Jackson | 909d75a | 2006-01-08 01:01:55 -0800 | [diff] [blame] | 98 | static inline nodemask_t cpuset_mems_allowed(struct task_struct *p) |
| 99 | { |
| 100 | return node_possible_map; |
| 101 | } |
| 102 | |
Christoph Lameter | 0e1e7c7 | 2007-10-16 01:25:38 -0700 | [diff] [blame] | 103 | #define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | static inline void cpuset_init_current_mems_allowed(void) {} |
Paul Jackson | cf2a473 | 2006-01-08 01:01:54 -0800 | [diff] [blame] | 105 | static inline void cpuset_update_task_memory_state(void) {} |
Paul Jackson | 5966514 | 2006-01-08 01:01:47 -0800 | [diff] [blame] | 106 | #define cpuset_nodes_subset_current_mems_allowed(nodes) (1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl) |
| 109 | { |
| 110 | return 1; |
| 111 | } |
| 112 | |
Paul Jackson | 02a0e53 | 2006-12-13 00:34:25 -0800 | [diff] [blame] | 113 | static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask) |
| 114 | { |
| 115 | return 1; |
| 116 | } |
| 117 | |
| 118 | static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | { |
| 120 | return 1; |
| 121 | } |
| 122 | |
David Rientjes | bbe373f | 2007-10-16 23:25:58 -0700 | [diff] [blame] | 123 | static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1, |
| 124 | const struct task_struct *tsk2) |
Paul Jackson | ef08e3b | 2005-09-06 15:18:13 -0700 | [diff] [blame] | 125 | { |
| 126 | return 1; |
| 127 | } |
| 128 | |
Paul Jackson | 3e0d98b | 2006-01-08 01:01:49 -0800 | [diff] [blame] | 129 | static inline void cpuset_memory_pressure_bump(void) {} |
| 130 | |
Eric W. Biederman | df5f831 | 2008-02-08 04:18:33 -0800 | [diff] [blame^] | 131 | static inline void cpuset_task_status_allowed(struct seq_file *m, |
| 132 | struct task_struct *task) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | } |
| 135 | |
Paul Jackson | 505970b | 2006-01-14 13:21:06 -0800 | [diff] [blame] | 136 | static inline void cpuset_lock(void) {} |
| 137 | static inline void cpuset_unlock(void) {} |
| 138 | |
Paul Jackson | 825a46a | 2006-03-24 03:16:03 -0800 | [diff] [blame] | 139 | static inline int cpuset_mem_spread_node(void) |
| 140 | { |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | static inline int cpuset_do_page_mem_spread(void) |
| 145 | { |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static inline int cpuset_do_slab_mem_spread(void) |
| 150 | { |
| 151 | return 0; |
| 152 | } |
| 153 | |
Paul Jackson | 38837fc | 2006-09-29 02:01:16 -0700 | [diff] [blame] | 154 | static inline void cpuset_track_online_nodes(void) {} |
| 155 | |
Paul Menage | 8793d85 | 2007-10-18 23:39:39 -0700 | [diff] [blame] | 156 | static inline int current_cpuset_is_being_rebound(void) |
| 157 | { |
| 158 | return 0; |
| 159 | } |
| 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | #endif /* !CONFIG_CPUSETS */ |
| 162 | |
| 163 | #endif /* _LINUX_CPUSET_H */ |