madvise(2) — 386BSD 1.0



MADVISE(2)                     1991                    MADVISE(2)


NAME
       madvise - give advise about use of memory

SYNOPSIS
       madvise(addr, len, behav)
       caddrt addr;
       int len, behav;

DESCRIPTION
       The   madvise  system  call  allows  a  process  that  has
       knowledge of its memory behavior to  describe  it  to  the
       system.   The  known  behaviors are given in <sys/mman.h>:
       #define  MADV_NORMAL      0     /*  no   further   special
       treatment   */  #define  MADV_RANDOM      1     /*  expect
       random            page            references            */
       #define  MADV_SEQUENTIAL  2     /*    expect    sequential
       references */ #define  MADV_WILLNEED    3     /* will need
       these  pages  */  #define  MADV_DONTNEED    4     /* don't
       need  these  pages  */  #define  MADV_SPACEAVAIL  5     /*
       insure that resources are reserved */

SEE ALSO
       msync.2, munmap.2, mprotect.2, madvise.2, mincore.2


































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