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David Howells607ca462012-10-13 10:46:48 +01001/*
2 * NUMA memory policies for Linux.
3 * Copyright 2003,2004 Andi Kleen SuSE Labs
4 */
5#ifndef _UAPI_LINUX_MEMPOLICY_H
6#define _UAPI_LINUX_MEMPOLICY_H
7
8#include <linux/errno.h>
9
10
11/*
12 * Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are
13 * passed by the user to either set_mempolicy() or mbind() in an 'int' actual.
14 * The MPOL_MODE_FLAGS macro determines the legal set of optional mode flags.
15 */
16
17/* Policies */
18enum {
19 MPOL_DEFAULT,
20 MPOL_PREFERRED,
21 MPOL_BIND,
22 MPOL_INTERLEAVE,
Peter Zijlstra479e2802012-10-25 14:16:28 +020023 MPOL_LOCAL,
David Howells607ca462012-10-13 10:46:48 +010024 MPOL_MAX, /* always last member of enum */
25};
26
27enum mpol_rebind_step {
28 MPOL_REBIND_ONCE, /* do rebind work at once(not by two step) */
29 MPOL_REBIND_STEP1, /* first step(set all the newly nodes) */
30 MPOL_REBIND_STEP2, /* second step(clean all the disallowed nodes)*/
31 MPOL_REBIND_NSTEP,
32};
33
34/* Flags for set_mempolicy */
35#define MPOL_F_STATIC_NODES (1 << 15)
36#define MPOL_F_RELATIVE_NODES (1 << 14)
37
38/*
39 * MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
40 * either set_mempolicy() or mbind().
41 */
42#define MPOL_MODE_FLAGS (MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES)
43
44/* Flags for get_mempolicy */
45#define MPOL_F_NODE (1<<0) /* return next IL mode instead of node mask */
46#define MPOL_F_ADDR (1<<1) /* look up vma using address */
47#define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */
48
49/* Flags for mbind */
50#define MPOL_MF_STRICT (1<<0) /* Verify existing pages in the mapping */
Lee Schermerhornb24f53a2012-10-25 14:16:32 +020051#define MPOL_MF_MOVE (1<<1) /* Move pages owned by this process to conform
52 to policy */
53#define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to policy */
54#define MPOL_MF_LAZY (1<<3) /* Modifies '_MOVE: lazy migrate on fault */
55#define MPOL_MF_INTERNAL (1<<4) /* Internal flags start here */
56
57#define MPOL_MF_VALID (MPOL_MF_STRICT | \
58 MPOL_MF_MOVE | \
Mel Gormana7200942012-11-16 09:37:58 +000059 MPOL_MF_MOVE_ALL)
David Howells607ca462012-10-13 10:46:48 +010060
61/*
62 * Internal flags that share the struct mempolicy flags word with
63 * "mode flags". These flags are allocated from bit 0 up, as they
64 * are never OR'ed into the mode in mempolicy API arguments.
65 */
66#define MPOL_F_SHARED (1 << 0) /* identify shared policies */
67#define MPOL_F_LOCAL (1 << 1) /* preferred local allocation */
68#define MPOL_F_REBINDING (1 << 2) /* identify policies in rebinding */
Lee Schermerhorn771fb4d2012-10-25 14:16:30 +020069#define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */
Mel Gorman8a0516e2015-02-12 14:58:22 -080070#define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */
David Howells607ca462012-10-13 10:46:48 +010071
72
73#endif /* _UAPI_LINUX_MEMPOLICY_H */