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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 */
 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 */
 74 

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