[mirror_ubuntu-artful-kernel.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>

#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);
#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_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;
}

#define cpuset_current_mems_allowed (node_online_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_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_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 */
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>
	14
	15	#ifdef CONFIG_CPUSETS
	16
202f72d5 PJ	17	extern int number_of_cpusets; /* How many cpusets are defined in system? */
202f72d5 PJ	18
c417f024	19	extern int cpuset_init_early(void);
1da177e4 LT	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);
909d75a3 PJ	24	extern cpumask_t cpuset_cpus_allowed(struct task_struct *p);
909d75a3 PJ	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
ef08e3b4	48	extern int cpuset_excl_nodes_overlap(const struct task_struct *p);
3e0d98b9 PJ	49
	50	#define cpuset_memory_pressure_bump() \
	51	do { \
	52	if (cpuset_memory_pressure_enabled) \
	53	__cpuset_memory_pressure_bump(); \
	54	} while (0)
	55	extern int cpuset_memory_pressure_enabled;
	56	extern void __cpuset_memory_pressure_bump(void);
	57
089e34b6	58	extern struct file_operations proc_cpuset_operations;
1da177e4 LT	59	extern char cpuset_task_status_allowed(struct task_struct task, char *buffer);
1da177e4 LT	60
505970b9 PJ	61	extern void cpuset_lock(void);
	62	extern void cpuset_unlock(void);
	63
825a46af PJ	64	extern int cpuset_mem_spread_node(void);
	65
	66	static inline int cpuset_do_page_mem_spread(void)
	67	{
	68	return current->flags & PF_SPREAD_PAGE;
	69	}
	70
	71	static inline int cpuset_do_slab_mem_spread(void)
	72	{
	73	return current->flags & PF_SPREAD_SLAB;
	74	}
	75
38837fc7 PJ	76	extern void cpuset_track_online_nodes(void);
38837fc7 PJ	77
1da177e4 LT	78	#else /* !CONFIG_CPUSETS */
1da177e4 LT	79
c417f024	80	static inline int cpuset_init_early(void) { return 0; }
1da177e4 LT	81	static inline int cpuset_init(void) { return 0; }
	82	static inline void cpuset_init_smp(void) {}
	83	static inline void cpuset_fork(struct task_struct *p) {}
	84	static inline void cpuset_exit(struct task_struct *p) {}
	85
	86	static inline cpumask_t cpuset_cpus_allowed(struct task_struct *p)
	87	{
	88	return cpu_possible_map;
	89	}
	90
909d75a3 PJ	91	static inline nodemask_t cpuset_mems_allowed(struct task_struct *p)
	92	{
	93	return node_possible_map;
	94	}
	95
9276b1bc	96	#define cpuset_current_mems_allowed (node_online_map)
1da177e4	97	static inline void cpuset_init_current_mems_allowed(void) {}
cf2a473c	98	static inline void cpuset_update_task_memory_state(void) {}
5966514d	99	#define cpuset_nodes_subset_current_mems_allowed(nodes) (1)
1da177e4 LT	100
	101	static inline int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
	102	{
	103	return 1;
	104	}
	105
02a0e53d PJ	106	static inline int cpuset_zone_allowed_softwall(struct zone *z, gfp_t gfp_mask)
	107	{
	108	return 1;
	109	}
	110
	111	static inline int cpuset_zone_allowed_hardwall(struct zone *z, gfp_t gfp_mask)
1da177e4 LT	112	{
	113	return 1;
	114	}
	115
ef08e3b4 PJ	116	static inline int cpuset_excl_nodes_overlap(const struct task_struct *p)
	117	{
	118	return 1;
	119	}
	120
3e0d98b9 PJ	121	static inline void cpuset_memory_pressure_bump(void) {}
3e0d98b9 PJ	122
1da177e4 LT	123	static inline char cpuset_task_status_allowed(struct task_struct task,
	124	char *buffer)
	125	{
	126	return buffer;
	127	}
	128
505970b9 PJ	129	static inline void cpuset_lock(void) {}
	130	static inline void cpuset_unlock(void) {}
	131
825a46af PJ	132	static inline int cpuset_mem_spread_node(void)
	133	{
	134	return 0;
	135	}
	136
	137	static inline int cpuset_do_page_mem_spread(void)
	138	{
	139	return 0;
	140	}
	141
	142	static inline int cpuset_do_slab_mem_spread(void)
	143	{
	144	return 0;
	145	}
	146
38837fc7 PJ	147	static inline void cpuset_track_online_nodes(void) {}
38837fc7 PJ	148
1da177e4 LT	149	#endif /* !CONFIG_CPUSETS */
	150
	151	#endif /* _LINUX_CPUSET_H */