(Alpha and Integrity servers) GH_RES_DATA specifies the size in
    pages of the resident image data granularity hint region.

    If bit 2 of the LOAD_SYS_IMAGES parameter is set, the image
    LDR$WRAPUP releases all unused pages in the granularity hint
    region at the the end of system startup. The unused pages of the
    resident image granularity hint region are either reserved for
    future use, or given back to the free memory list.

    GH_RES_DATA has the AUTOGEN and FEEDBACK attributes.