[linux-2.6-block.git] / include / linux / cpuset.h

#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>
#include <linux/cgroup.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 cpumask_t cpuset_cpus_allowed(struct task_struct *p);
extern cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p);
extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
#define cpuset_current_mems_allowed (current->mems_allowed)
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_softwall(struct zone *z, gfp_t gfp_mask);
extern int __cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask);

static int inline cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
{
	return number_of_cpusets <= 1 ||
		__cpuset_zone_allowed_softwall(z, gfp_mask);
}

static int inline cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
{
	return number_of_cpusets <= 1 ||
		__cpuset_zone_allowed_hardwall(z, gfp_mask);
}

extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
					  const struct task_struct *tsk2);

#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 const 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);

extern int current_cpuset_is_being_rebound(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 cpumask_t cpuset_cpus_allowed(struct task_struct *p)
{
	return cpu_possible_map;
}
static inline cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p)
{
	return cpu_possible_map;
}

static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
{
	return node_possible_map;
}

#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
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_softwall(struct zone *z, gfp_t gfp_mask)
{
	return 1;
}

static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
{
	return 1;
}

static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
						 const struct task_struct *tsk2)
{
	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) {}

static inline int current_cpuset_is_being_rebound(void)
{
	return 0;
}

#endif /* !CONFIG_CPUSETS */

#endif /* _LINUX_CPUSET_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_CPUSET_H
	2	#define _LINUX_CPUSET_H
	3	/*
	4	* cpuset interface
	5	*
	6	* Copyright (C) 2003 BULL SA
825a46af	7	* Copyright (C) 2004-2006 Silicon Graphics, Inc.
1da177e4 LT	8	*
	9	*/
	10
	11	#include <linux/sched.h>
	12	#include <linux/cpumask.h>
	13	#include <linux/nodemask.h>
8793d854	14	#include <linux/cgroup.h>
1da177e4 LT	15
	16	#ifdef CONFIG_CPUSETS
	17
202f72d5 PJ	18	extern int number_of_cpusets; /* How many cpusets are defined in system? */
202f72d5 PJ	19
c417f024	20	extern int cpuset_init_early(void);
1da177e4 LT	21	extern int cpuset_init(void);
1da177e4 LT	22	extern void cpuset_init_smp(void);
909d75a3	23	extern cpumask_t cpuset_cpus_allowed(struct task_struct *p);
470fd646	24	extern cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p);
909d75a3	25	extern nodemask_t cpuset_mems_allowed(struct task_struct *p);
9276b1bc	26	#define cpuset_current_mems_allowed (current->mems_allowed)
1da177e4	27	void cpuset_init_current_mems_allowed(void);
cf2a473c	28	void cpuset_update_task_memory_state(void);
5966514d PJ	29	#define cpuset_nodes_subset_current_mems_allowed(nodes) \
5966514d PJ	30	nodes_subset((nodes), current->mems_allowed)
1da177e4	31	int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl);
202f72d5	32
02a0e53d PJ	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)
	37	{
	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)
202f72d5	43	{
02a0e53d PJ	44	return number_of_cpusets <= 1 \|\|
02a0e53d PJ	45	__cpuset_zone_allowed_hardwall(z, gfp_mask);
202f72d5 PJ	46	}
202f72d5 PJ	47
bbe373f2 DR	48	extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
bbe373f2 DR	49	const struct task_struct *tsk2);
3e0d98b9 PJ	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
54047320	59	extern const struct file_operations proc_cpuset_operations;
1da177e4 LT	60	extern char cpuset_task_status_allowed(struct task_struct task, char *buffer);
1da177e4 LT	61
505970b9 PJ	62	extern void cpuset_lock(void);
	63	extern void cpuset_unlock(void);
	64
825a46af PJ	65	extern int cpuset_mem_spread_node(void);
	66
	67	static inline int cpuset_do_page_mem_spread(void)
	68	{
	69	return current->flags & PF_SPREAD_PAGE;
	70	}
	71
	72	static inline int cpuset_do_slab_mem_spread(void)
	73	{
	74	return current->flags & PF_SPREAD_SLAB;
	75	}
	76
38837fc7 PJ	77	extern void cpuset_track_online_nodes(void);
38837fc7 PJ	78
8793d854 PM	79	extern int current_cpuset_is_being_rebound(void);
8793d854 PM	80
1da177e4 LT	81	#else /* !CONFIG_CPUSETS */
1da177e4 LT	82
c417f024	83	static inline int cpuset_init_early(void) { return 0; }
1da177e4 LT	84	static inline int cpuset_init(void) { return 0; }
1da177e4 LT	85	static inline void cpuset_init_smp(void) {}
1da177e4 LT	86
	87	static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
	88	{
	89	return cpu_possible_map;
	90	}
470fd646 CW	91	static inline cpumask_t cpuset_cpus_allowed_locked(struct task_struct *p)
	92	{
	93	return cpu_possible_map;
	94	}
1da177e4	95
909d75a3 PJ	96	static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
	97	{
	98	return node_possible_map;
	99	}
	100
0e1e7c7a	101	#define cpuset_current_mems_allowed (node_states[N_HIGH_MEMORY])
1da177e4	102	static inline void cpuset_init_current_mems_allowed(void) {}
cf2a473c	103	static inline void cpuset_update_task_memory_state(void) {}
5966514d	104	#define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
1da177e4 LT	105
	106	static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
	107	{
	108	return 1;
	109	}
	110
02a0e53d PJ	111	static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
	112	{
	113	return 1;
	114	}
	115
	116	static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
1da177e4 LT	117	{
	118	return 1;
	119	}
	120
bbe373f2 DR	121	static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
bbe373f2 DR	122	const struct task_struct *tsk2)
ef08e3b4 PJ	123	{
	124	return 1;
	125	}
	126
3e0d98b9 PJ	127	static inline void cpuset_memory_pressure_bump(void) {}
3e0d98b9 PJ	128
1da177e4 LT	129	static inline char cpuset_task_status_allowed(struct task_struct task,
	130	char *buffer)
	131	{
	132	return buffer;
	133	}
	134
505970b9 PJ	135	static inline void cpuset_lock(void) {}
	136	static inline void cpuset_unlock(void) {}
	137
825a46af PJ	138	static inline int cpuset_mem_spread_node(void)
	139	{
	140	return 0;
	141	}
	142
	143	static inline int cpuset_do_page_mem_spread(void)
	144	{
	145	return 0;
	146	}
	147
	148	static inline int cpuset_do_slab_mem_spread(void)
	149	{
	150	return 0;
	151	}
	152
38837fc7 PJ	153	static inline void cpuset_track_online_nodes(void) {}
38837fc7 PJ	154
8793d854 PM	155	static inline int current_cpuset_is_being_rebound(void)
	156	{
	157	return 0;
	158	}
	159
1da177e4 LT	160	#endif /* !CONFIG_CPUSETS */
	161
	162	#endif /* _LINUX_CPUSET_H */