1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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 */
19enum {
20 MPOL_DEFAULT,
21 MPOL_PREFERRED,
22 MPOL_BIND,
23 MPOL_INTERLEAVE,
24 MPOL_LOCAL,
25 MPOL_PREFERRED_MANY,
26 MPOL_MAX, /* always last member of enum */
27};
28
29/* Flags for set_mempolicy */
30#define MPOL_F_STATIC_NODES (1 << 15)
31#define MPOL_F_RELATIVE_NODES (1 << 14)
32#define MPOL_F_NUMA_BALANCING (1 << 13) /* Optimize with NUMA balancing if possible */
33
34/*
35 * MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
36 * either set_mempolicy() or mbind().
37 */
38#define MPOL_MODE_FLAGS \
39 (MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES | MPOL_F_NUMA_BALANCING)
40
41/* Flags for get_mempolicy */
42#define MPOL_F_NODE (1<<0) /* return next IL mode instead of node mask */
43#define MPOL_F_ADDR (1<<1) /* look up vma using address */
44#define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */
45
46/* Flags for mbind */
47#define MPOL_MF_STRICT (1<<0) /* Verify existing pages in the mapping */
48#define MPOL_MF_MOVE (1<<1) /* Move pages owned by this process to conform
49 to policy */
50#define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to policy */
51#define MPOL_MF_LAZY (1<<3) /* Modifies '_MOVE: lazy migrate on fault */
52#define MPOL_MF_INTERNAL (1<<4) /* Internal flags start here */
53
54#define MPOL_MF_VALID (MPOL_MF_STRICT | \
55 MPOL_MF_MOVE | \
56 MPOL_MF_MOVE_ALL)
57
58/*
59 * Internal flags that share the struct mempolicy flags word with
60 * "mode flags". These flags are allocated from bit 0 up, as they
61 * are never OR'ed into the mode in mempolicy API arguments.
62 */
63#define MPOL_F_SHARED (1 << 0) /* identify shared policies */
64#define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */
65#define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */
66
67/*
68 * These bit locations are exposed in the vm.zone_reclaim_mode sysctl
69 * ABI. New bits are OK, but existing bits can never change.
70 */
71#define RECLAIM_ZONE (1<<0) /* Run shrink_inactive_list on the zone */
72#define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */
73#define RECLAIM_UNMAP (1<<2) /* Unmap pages during reclaim */
74
75#endif /* _UAPI_LINUX_MEMPOLICY_H */
76

source code of linux/include/uapi/linux/mempolicy.h