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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 Labs5 */6#ifndef _UAPI_LINUX_MEMPOLICY_H7#define _UAPI_LINUX_MEMPOLICY_H8 9#include <linux/errno.h>10 11 12/*13 * Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are14 * 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_WEIGHTED_INTERLEAVE,27 MPOL_MAX, /* always last member of enum */28};29 30/* Flags for set_mempolicy */31#define MPOL_F_STATIC_NODES (1 << 15)32#define MPOL_F_RELATIVE_NODES (1 << 14)33#define MPOL_F_NUMA_BALANCING (1 << 13) /* Optimize with NUMA balancing if possible */34 35/*36 * MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to37 * either set_mempolicy() or mbind().38 */39#define MPOL_MODE_FLAGS \40 (MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES | MPOL_F_NUMA_BALANCING)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 */49#define MPOL_MF_MOVE (1<<1) /* Move pages owned by this process to conform50 to policy */51#define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to policy */52#define MPOL_MF_LAZY (1<<3) /* UNSUPPORTED FLAG: Lazy migrate on fault */53#define MPOL_MF_INTERNAL (1<<4) /* Internal flags start here */54 55#define MPOL_MF_VALID (MPOL_MF_STRICT | \56 MPOL_MF_MOVE | \57 MPOL_MF_MOVE_ALL)58 59/*60 * Internal flags that share the struct mempolicy flags word with61 * "mode flags". These flags are allocated from bit 0 up, as they62 * are never OR'ed into the mode in mempolicy API arguments.63 */64#define MPOL_F_SHARED (1 << 0) /* identify shared policies */65#define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */66#define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */67 68/*69 * These bit locations are exposed in the vm.zone_reclaim_mode sysctl70 * 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 */75 76#endif /* _UAPI_LINUX_MEMPOLICY_H */77