tlepage">
              <div>
                <div>
                  <h4 class="title"><a id="filebackedregions"></a>Regions Backed by Files</h4>
                </div>
              </div>
            </div>
            <p>
           By default, shared memory regions are created as files in the environment's
           home directory (<span class="emphasis"><em>not</em></span> the environment's data
           directory). If it is available, the POSIX <code class="literal">mmap</code> 
           interfa