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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_CPUSET_H
2#define _LINUX_CPUSET_H
3/*
4 * cpuset interface
5 *
6 * Copyright (C) 2003 BULL SA
Paul Jackson825a46a2006-03-24 03:16:03 -08007 * Copyright (C) 2004-2006 Silicon Graphics, Inc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 *
9 */
10
11#include <linux/sched.h>
12#include <linux/cpumask.h>
13#include <linux/nodemask.h>
Paul Menage8793d852007-10-18 23:39:39 -070014#include <linux/cgroup.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
16#ifdef CONFIG_CPUSETS
17
Paul Jackson202f72d2006-01-08 01:01:57 -080018extern int number_of_cpusets; /* How many cpusets are defined in system? */
19
Paul Jacksonc417f022006-01-08 01:02:01 -080020extern int cpuset_init_early(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070021extern int cpuset_init(void);
22extern void cpuset_init_smp(void);
Mike Travisf9a86fc2008-04-04 18:11:07 -070023extern void cpuset_cpus_allowed(struct task_struct *p, cpumask_t *mask);
24extern void cpuset_cpus_allowed_locked(struct task_struct *p, cpumask_t *mask);
Paul Jackson909d75a2006-01-08 01:01:55 -080025extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
Paul Jackson9276b1bc2006-12-06 20:31:48 -080026#define cpuset_current_mems_allowed (current->mems_allowed)
Linus Torvalds1da177e2005-04-16 15:20:36 -070027void cpuset_init_current_mems_allowed(void);
Paul Jacksoncf2a473c2006-01-08 01:01:54 -080028void cpuset_update_task_memory_state(void);
Mel Gorman19770b32008-04-28 02:12:18 -070029int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask);
Paul Jackson202f72d2006-01-08 01:01:57 -080030
Paul Jackson02a0e532006-12-13 00:34:25 -080031extern int __cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask);
32extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);
33
34static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
Paul Jackson202f72d2006-01-08 01:01:57 -080035{
Paul Jackson02a0e532006-12-13 00:34:25 -080036 return number_of_cpusets <= 1 ||
37 __cpuset_zone_allowed_softwall(z, gfp_mask);
38}
39
40static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
41{
42 return number_of_cpusets <= 1 ||
43 __cpuset_zone_allowed_hardwall(z, gfp_mask);
Paul Jackson202f72d2006-01-08 01:01:57 -080044}
45
David Rientjesbbe373f2007-10-16 23:25:58 -070046extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
47 const struct task_struct *tsk2);
Paul Jackson3e0d98b2006-01-08 01:01:49 -080048
49#define cpuset_memory_pressure_bump() \
50 do { \
51 if (cpuset_memory_pressure_enabled) \
52 __cpuset_memory_pressure_bump(); \
53 } while (0)
54extern int cpuset_memory_pressure_enabled;
55extern void __cpuset_memory_pressure_bump(void);
56
Arjan van de Ven54047322007-02-12 00:55:28 -080057extern const struct file_operations proc_cpuset_operations;
Eric W. Biedermandf5f8312008-02-08 04:18:33 -080058struct seq_file;
59extern void cpuset_task_status_allowed(struct seq_file *m,
60 struct task_struct *task);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Paul Jackson505970b2006-01-14 13:21:06 -080062extern void cpuset_lock(void);
63extern void cpuset_unlock(void);
64
Paul Jackson825a46a2006-03-24 03:16:03 -080065extern int cpuset_mem_spread_node(void);
66
67static inline int cpuset_do_page_mem_spread(void)
68{
69 return current->flags & PF_SPREAD_PAGE;
70}
71
72static inline int cpuset_do_slab_mem_spread(void)
73{
74 return current->flags & PF_SPREAD_SLAB;
75}
76
Paul Jackson38837fc2006-09-29 02:01:16 -070077extern void cpuset_track_online_nodes(void);
78
Paul Menage8793d852007-10-18 23:39:39 -070079extern int current_cpuset_is_being_rebound(void);
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081#else /* !CONFIG_CPUSETS */
82
Paul Jacksonc417f022006-01-08 01:02:01 -080083static inline int cpuset_init_early(void) { return 0; }
Linus Torvalds1da177e2005-04-16 15:20:36 -070084static inline int cpuset_init(void) { return 0; }
85static inline void cpuset_init_smp(void) {}
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
Mike Travisf9a86fc2008-04-04 18:11:07 -070087static inline void cpuset_cpus_allowed(struct task_struct *p, cpumask_t *mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070088{
Mike Travisf9a86fc2008-04-04 18:11:07 -070089 *mask = cpu_possible_map;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090}
Mike Travisf9a86fc2008-04-04 18:11:07 -070091static inline void cpuset_cpus_allowed_locked(struct task_struct *p,
92 cpumask_t *mask)
Cliff Wickman470fd642007-10-18 23:40:46 -070093{
Mike Travisf9a86fc2008-04-04 18:11:07 -070094 *mask = cpu_possible_map;
Cliff Wickman470fd642007-10-18 23:40:46 -070095}
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Paul Jackson909d75a2006-01-08 01:01:55 -080097static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
98{
99 return node_possible_map;
100}
101
Christoph Lameter0e1e7c72007-10-16 01:25:38 -0700102#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103static inline void cpuset_init_current_mems_allowed(void) {}
Paul Jacksoncf2a473c2006-01-08 01:01:54 -0800104static inline void cpuset_update_task_memory_state(void) {}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
Mel Gorman19770b32008-04-28 02:12:18 -0700106static inline int cpuset_nodemask_valid_mems_allowed(nodemask_t *nodemask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107{
108 return 1;
109}
110
Paul Jackson02a0e532006-12-13 00:34:25 -0800111static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
112{
113 return 1;
114}
115
116static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117{
118 return 1;
119}
120
David Rientjesbbe373f2007-10-16 23:25:58 -0700121static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
122 const struct task_struct *tsk2)
Paul Jacksonef08e3b2005-09-06 15:18:13 -0700123{
124 return 1;
125}
126
Paul Jackson3e0d98b2006-01-08 01:01:49 -0800127static inline void cpuset_memory_pressure_bump(void) {}
128
Eric W. Biedermandf5f8312008-02-08 04:18:33 -0800129static inline void cpuset_task_status_allowed(struct seq_file *m,
130 struct task_struct *task)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132}
133
Paul Jackson505970b2006-01-14 13:21:06 -0800134static inline void cpuset_lock(void) {}
135static inline void cpuset_unlock(void) {}
136
Paul Jackson825a46a2006-03-24 03:16:03 -0800137static inline int cpuset_mem_spread_node(void)
138{
139 return 0;
140}
141
142static inline int cpuset_do_page_mem_spread(void)
143{
144 return 0;
145}
146
147static inline int cpuset_do_slab_mem_spread(void)
148{
149 return 0;
150}
151
Paul Jackson38837fc2006-09-29 02:01:16 -0700152static inline void cpuset_track_online_nodes(void) {}
153
Paul Menage8793d852007-10-18 23:39:39 -0700154static inline int current_cpuset_is_being_rebound(void)
155{
156 return 0;
157}
158
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159#endif /* !CONFIG_CPUSETS */
160
161#endif /* _LINUX_CPUSET_H */