{
{   The purpose of this request is free pages assigned to a segment.
{ All pages which are fully contained within the portion of
{ the segment specified are deleted from the segment and returned to
{ the free page queue. Modified pages are NOT updated on disk.
{ Use of this request requires write access to the segment.
{
{       MMP$FREE_PAGES (PVA, LENGTH, WAIT, STATUS)
{
{ PVA: (input) This parameter specifies the start of the
{       range of memory to be updated on disk.
{
{ LENGTH: (input) This parameter specifies the number of bytes
{       to be updated on disk.
{
{ WAIT: (input) This parameter specifies whether the task
{       should wait if active IO operations prevent freeing pages.
{
{ STATUS: (output) This parameter specifies the request status.
{       The possible error codes are:
{             mme$invalid_pva
{             mme$ref_to_unrecovered_file
{

