[linux-2.6-block.git] / include / uapi / linux / mempolicy.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * NUMA memory policies for Linux.
 * Copyright 2003,2004 Andi Kleen SuSE Labs
 */
#ifndef _UAPI_LINUX_MEMPOLICY_H
#define _UAPI_LINUX_MEMPOLICY_H

#include <linux/errno.h>


/*
 * Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are
 * passed by the user to either set_mempolicy() or mbind() in an 'int' actual.
 * The MPOL_MODE_FLAGS macro determines the legal set of optional mode flags.
 */

/* Policies */
enum {
	MPOL_DEFAULT,
	MPOL_PREFERRED,
	MPOL_BIND,
	MPOL_INTERLEAVE,
	MPOL_LOCAL,
	MPOL_PREFERRED_MANY,
	MPOL_WEIGHTED_INTERLEAVE,
	MPOL_MAX,	/* always last member of enum */
};

/* Flags for set_mempolicy */
#define MPOL_F_STATIC_NODES	(1 << 15)
#define MPOL_F_RELATIVE_NODES	(1 << 14)
#define MPOL_F_NUMA_BALANCING	(1 << 13) /* Optimize with NUMA balancing if possible */

/*
 * MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
 * either set_mempolicy() or mbind().
 */
#define MPOL_MODE_FLAGS							\
	(MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES | MPOL_F_NUMA_BALANCING)

/* Flags for get_mempolicy */
#define MPOL_F_NODE	(1<<0)	/* return next IL mode instead of node mask */
#define MPOL_F_ADDR	(1<<1)	/* look up vma using address */
#define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */

/* Flags for mbind */
#define MPOL_MF_STRICT	(1<<0)	/* Verify existing pages in the mapping */
#define MPOL_MF_MOVE	 (1<<1)	/* Move pages owned by this process to conform
				   to policy */
#define MPOL_MF_MOVE_ALL (1<<2)	/* Move every page to conform to policy */
#define MPOL_MF_LAZY	 (1<<3)	/* UNSUPPORTED FLAG: Lazy migrate on fault */
#define MPOL_MF_INTERNAL (1<<4)	/* Internal flags start here */

#define MPOL_MF_VALID	(MPOL_MF_STRICT   | 	\
			 MPOL_MF_MOVE     | 	\
			 MPOL_MF_MOVE_ALL)

/*
 * Internal flags that share the struct mempolicy flags word with
 * "mode flags".  These flags are allocated from bit 0 up, as they
 * are never OR'ed into the mode in mempolicy API arguments.
 */
#define MPOL_F_SHARED  (1 << 0)	/* identify shared policies */
#define MPOL_F_MOF	(1 << 3) /* this policy wants migrate on fault */
#define MPOL_F_MORON	(1 << 4) /* Migrate On protnone Reference On Node */

/*
 * These bit locations are exposed in the vm.zone_reclaim_mode sysctl
 * ABI.  New bits are OK, but existing bits can never change.
 */
#define RECLAIM_ZONE	(1<<0)	/* Run shrink_inactive_list on the zone */
#define RECLAIM_WRITE	(1<<1)	/* Writeout pages during reclaim */
#define RECLAIM_UNMAP	(1<<2)	/* Unmap pages during reclaim */

#endif /* _UAPI_LINUX_MEMPOLICY_H */
Commit	Line	Data
6f52b16c	1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
607ca46e DH	2	/*
	3	* NUMA memory policies for Linux.
	4	* Copyright 2003,2004 Andi Kleen SuSE Labs
	5	*/
	6	#ifndef _UAPI_LINUX_MEMPOLICY_H
	7	#define _UAPI_LINUX_MEMPOLICY_H
	8
	9	#include <linux/errno.h>
	10
	11
	12	/*
	13	* Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are
	14	* passed by the user to either set_mempolicy() or mbind() in an 'int' actual.
	15	* The MPOL_MODE_FLAGS macro determines the legal set of optional mode flags.
	16	*/
	17
	18	/* Policies */
	19	enum {
	20	MPOL_DEFAULT,
	21	MPOL_PREFERRED,
	22	MPOL_BIND,
	23	MPOL_INTERLEAVE,
479e2802	24	MPOL_LOCAL,
b27abacc	25	MPOL_PREFERRED_MANY,
fa3bea4e	26	MPOL_WEIGHTED_INTERLEAVE,
607ca46e DH	27	MPOL_MAX, /* always last member of enum */
	28	};
	29
607ca46e DH	30	/* Flags for set_mempolicy */
	31	#define MPOL_F_STATIC_NODES (1 << 15)
	32	#define MPOL_F_RELATIVE_NODES (1 << 14)
bda420b9	33	#define MPOL_F_NUMA_BALANCING (1 << 13) /* Optimize with NUMA balancing if possible */
607ca46e DH	34
	35	/*
	36	* MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
	37	* either set_mempolicy() or mbind().
	38	*/
bda420b9 HY	39	#define MPOL_MODE_FLAGS \
bda420b9 HY	40	(MPOL_F_STATIC_NODES \| MPOL_F_RELATIVE_NODES \| MPOL_F_NUMA_BALANCING)
607ca46e DH	41
	42	/* Flags for get_mempolicy */
	43	#define MPOL_F_NODE (1<<0) /* return next IL mode instead of node mask */
	44	#define MPOL_F_ADDR (1<<1) /* look up vma using address */
	45	#define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */
	46
	47	/* Flags for mbind */
	48	#define MPOL_MF_STRICT (1<<0) /* Verify existing pages in the mapping */
b24f53a0 LS	49	#define MPOL_MF_MOVE (1<<1) /* Move pages owned by this process to conform
	50	to policy */
	51	#define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to policy */
2cafb582	52	#define MPOL_MF_LAZY (1<<3) /* UNSUPPORTED FLAG: Lazy migrate on fault */
b24f53a0 LS	53	#define MPOL_MF_INTERNAL (1<<4) /* Internal flags start here */
	54
	55	#define MPOL_MF_VALID (MPOL_MF_STRICT \| \
	56	MPOL_MF_MOVE \| \
a720094d	57	MPOL_MF_MOVE_ALL)
607ca46e DH	58
	59	/*
	60	* Internal flags that share the struct mempolicy flags word with
	61	* "mode flags". These flags are allocated from bit 0 up, as they
	62	* are never OR'ed into the mode in mempolicy API arguments.
	63	*/
	64	#define MPOL_F_SHARED (1 << 0) /* identify shared policies */
771fb4d8	65	#define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */
8a0516ed	66	#define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */
607ca46e	67
b6676de8 DH	68	/*
	69	* These bit locations are exposed in the vm.zone_reclaim_mode sysctl
	70	* ABI. New bits are OK, but existing bits can never change.
	71	*/
	72	#define RECLAIM_ZONE (1<<0) /* Run shrink_inactive_list on the zone */
	73	#define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */
	74	#define RECLAIM_UNMAP (1<<2) /* Unmap pages during reclaim */
607ca46e DH	75
607ca46e DH	76	#endif /* _UAPI_LINUX_MEMPOLICY_H */