/ALLOCATE
       /NOALLOCATE (default)

    Allocates pages during the next reboot of the system. The
    physical alignment of the pages is based on the maximum
    granularity hint factor that can be used to map the pages
    without exceeding the size of the memory reservation. (See the
    introduction to this section for more information about the
    /ALLOCATE qualifier.)

    Possible granularity hint factors are 512 pages (or 4 MB) and 64
    pages (or 512 KB). Therefore, assuming an 8 KB system page size,
    reserved memory is physically aligned as follows:

    o  size >= 4 MB: physically aligned on a 4 MB boundary

    o  size < 4 MB: physically aligned on a 512 KB boundary

    If you specify /NOALLOCATE, or do not specify /ALLOCATE, memory
    is reserved only by reducing the system's fluid page count, but
    no specific pages are set aside.