1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
3 * NUMA memory policies for Linux.
4 * Copyright 2003,2004 Andi Kleen SuSE Labs
6 #ifndef _UAPI_LINUX_MEMPOLICY_H
7 #define _UAPI_LINUX_MEMPOLICY_H
9 #include <linux/errno.h>
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.
25 MPOL_MAX, /* always last member of enum */
28 /* Flags for set_mempolicy */
29 #define MPOL_F_STATIC_NODES (1 << 15)
30 #define MPOL_F_RELATIVE_NODES (1 << 14)
31 #define MPOL_F_NUMA_BALANCING (1 << 13) /* Optimize with NUMA balancing if possible */
34 * MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
35 * either set_mempolicy() or mbind().
37 #define MPOL_MODE_FLAGS \
38 (MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES | MPOL_F_NUMA_BALANCING)
40 /* Flags for get_mempolicy */
41 #define MPOL_F_NODE (1<<0) /* return next IL mode instead of node mask */
42 #define MPOL_F_ADDR (1<<1) /* look up vma using address */
43 #define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */
46 #define MPOL_MF_STRICT (1<<0) /* Verify existing pages in the mapping */
47 #define MPOL_MF_MOVE (1<<1) /* Move pages owned by this process to conform
49 #define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to policy */
50 #define MPOL_MF_LAZY (1<<3) /* Modifies '_MOVE: lazy migrate on fault */
51 #define MPOL_MF_INTERNAL (1<<4) /* Internal flags start here */
53 #define MPOL_MF_VALID (MPOL_MF_STRICT | \
58 * Internal flags that share the struct mempolicy flags word with
59 * "mode flags". These flags are allocated from bit 0 up, as they
60 * are never OR'ed into the mode in mempolicy API arguments.
62 #define MPOL_F_SHARED (1 << 0) /* identify shared policies */
63 #define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */
64 #define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */
67 * These bit locations are exposed in the vm.zone_reclaim_mode sysctl
68 * ABI. New bits are OK, but existing bits can never change.
70 #define RECLAIM_ZONE (1<<0) /* Run shrink_inactive_list on the zone */
71 #define RECLAIM_WRITE (1<<1) /* Writeout pages during reclaim */
72 #define RECLAIM_UNMAP (1<<2) /* Unmap pages during reclaim */
74 #endif /* _UAPI_LINUX_MEMPOLICY_H */