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

  • BSD mandoc
     

    NAME

    
    
    vm_fault_prefault
    
     - cluster page faults into a process's address space
    
     
    

    SYNOPSIS

       #include <sys/param.h>
       #include <vm/vm.h>
       #include <vm/pmap.h>
    void vm_fault_prefault (pmap_t pmap vm_offset_t addra vm_map_entry_t entry);
     

    DESCRIPTION

    The vm_fault_prefault ();
    function provides a means of clustering pagefaults into a process's address space. It operates upon the physical map Fa pmap . The Fa entry argument specifies the entry to be prefaulted; the Fa addra argument specifies the beginning of the mapping in the process's virtual address space.

    It is typically called by vm_fault ();
    after the first page fault. It benefits the execve(2) system call by eliminating repetitive calls to vm_fault (,);
    which would otherwise be made to bring the process's executable pages into physical memory.  

    IMPLEMENTATION NOTES

    This is a machine-independent function which calls the machine-dependent pmap_is_prefaultable9 helper function to determine if a page may be prefaulted into physical memory.  

    SEE ALSO

    execve(2), pmap_is_prefaultable9  

    AUTHORS

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


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    IMPLEMENTATION NOTES
    SEE ALSO
    AUTHORS


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