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pmap_page_exists_quick (9)
  • >> pmap_page_exists_quick (9) ( FreeBSD man: Ядро )

  • BSD mandoc
     

    NAME

    
    
    pmap_page_exists_quick
    
     - determine if a page exists in a physical map
    
     
    

    SYNOPSIS

       #include <sys/param.h>
       #include <vm/vm.h>
       #include <vm/pmap.h>
    boolean_t pmap_page_exists_quick (pmap_t pmap vm_page_t m);
     

    DESCRIPTION

    The pmap_page_exists_quick ();
    function is used to quickly determine if the page Fa m exists in the physical map Fa pmap . It is typically called from the VM paging code.  

    IMPLEMENTATION NOTES

    The PV count used above may be changed upwards or downwards in future; it is only necessary that TRUE be returned for a small subset of pmaps for proper page aging.  

    RETURN VALUES

    The pmap_page_exists_quick ();
    returns TRUE only if the PV entry for the physical map Fa pmap is one of the first 16 PVs linked from the page Fa m .  

    SEE ALSO

    pmap(9)  

    AUTHORS

    This manual page was written by An Bruce M Simpson Aq [email protected] .


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    IMPLEMENTATION NOTES
    RETURN VALUES
    SEE ALSO
    AUTHORS


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