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 */
  18 enum {
  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
  27 enum 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 */