LXR linux/include/uapi/linux/mempolicy.h

   1/*
   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,
  23        MPOL_LOCAL,
  24        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 */
  51#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     |     \
  59                         MPOL_MF_MOVE_ALL)
  60
  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 */
  69#define MPOL_F_MOF      (1 << 3) /* this policy wants migrate on fault */
  70#define MPOL_F_MORON    (1 << 4) /* Migrate On protnone Reference On Node */
  71
  72
  73#endif /* _UAPI_LINUX_MEMPOLICY_H */
  74