include/uapi/linux/mempolicy.h

   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 */
  19 enum {
  20         MPOL_DEFAULT,
  21         MPOL_PREFERRED,
  22         MPOL_BIND,
  23         MPOL_INTERLEAVE,
  24         MPOL_LOCAL,
  25         MPOL_MAX,       /* always last member of enum */
  26 };
  27
  28 /* Flags for set_mempolicy */
  29 #define MPOL_F_STATIC_NODES     (1 << 15)
  30 #define MPOL_F_RELATIVE_NODES   (1 << 14)
  31
  32 /*
  33  * MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
  34  * either set_mempolicy() or mbind().
  35  */
  36 #define MPOL_MODE_FLAGS (MPOL_F_STATIC_NODES | MPOL_F_RELATIVE_NODES)
  37
  38 /* Flags for get_mempolicy */
  39 #define MPOL_F_NODE     (1<<0)  /* return next IL mode instead of node mask */
  40 #define MPOL_F_ADDR     (1<<1)  /* look up vma using address */
  41 #define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */
  42
  43 /* Flags for mbind */
  44 #define MPOL_MF_STRICT  (1<<0)  /* Verify existing pages in the mapping */
  45 #define MPOL_MF_MOVE     (1<<1) /* Move pages owned by this process to conform
  46                                    to policy */
  47 #define MPOL_MF_MOVE_ALL (1<<2) /* Move every page to conform to policy */
  48 #define MPOL_MF_LAZY     (1<<3) /* Modifies '_MOVE:  lazy migrate on fault */
  49 #define MPOL_MF_INTERNAL (1<<4) /* Internal flags start here */
  50
  51 #define MPOL_MF_VALID   (MPOL_MF_STRICT   |     \
  52                          MPOL_MF_MOVE     |     \
  53                          MPOL_MF_MOVE_ALL)
  54
  55 /*
  56  * Internal flags that share the struct mempolicy flags word with
  57  * "mode flags".  These flags are allocated from bit 0 up, as they
  58  * are never OR'ed into the mode in mempolicy API arguments.
  59  */
  60 #define MPOL_F_SHARED  (1 << 0) /* identify shared policies */
  61 #define MPOL_F_LOCAL   (1 << 1) /* preferred local allocation */
  62 #define MPOL_F_MOF      (1 << 3) /* this policy wants migrate on fault */
  63 #define MPOL_F_MORON    (1 << 4) /* Migrate On protnone Reference On Node */
  64
  65
  66 #endif /* _UAPI_LINUX_MEMPOLICY_H */