{
{  The purpose of this request is to change the segment access selections
{  associated with a segment. Three access selections are currently supported
{  for access to a segment: sequential, random, and read_tu. Sequential access
{  should be selected if access to the segment is sequential and more than 4
{  pages will be accessed sequentially. Sequential access should NOT be selected
{  for segments that are managed via ADVISE requests. Read_tu access should be
{  selected if the task is randomly accessing large blocks of data in the
{  segment, or if the task is sequentially accessing multiple parts of the
{  segment.  Random access should be selected otherwise.
{
{  An access selection of sequential causes memory manager to read an entire
{  transfer unit when a page fault occurs for a page on disk. In addition
{  pages assigned to the segment may be automatically removed when new
{  pages are added as a result of a page fault.
{
{  An access selection of read_tu causes memory manager to read multiple pages,
{  one or more transfer units, when a page fault occurs for a page on disk.  In
{  addition pages assigned to the segment are not automatically removed when new
{  pages are added as a result of a page fault.
{
{  An access selection of random causes memory manager to read one page for each
{  page fault for a page on disk.  No pages pages are removed as a result of the
{  page fault.
{
{          MMP$SET_ACCESS_SELECTIONS (PVA, ACCESS_SELECTIONS, STATUS)
{
{    PVA: (input) This parameter specifies the segment.
{
{    ACCESS_SELECTIONS: (input) This parameter specifies the access
{         selections for the segment.
{
{    STATUS: (output) This parameter specifies the request status.
{         The possible error codes are:
{              dme$unable_lo_locate_fde
{              dme$unable_to_get_fd_lock
{              mme$invalid_ring_brackets
{              mme$ring_violation
{              mme$segment_number_not_in_use
{              mme$segment_number_too_big
{              mme$segment_origin_change
{
