Add description of transcendent memory

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   </ul>
 </div>
 
+<div class="slide">
+  <h1>Transcendent memory [3.0-3.5]</h1>
+  <ul class="incremental">
+    <li>
+      Abstract storage for memory pages, expected to be slower than
+      regular memory but faster than disk
+    </li>
+    <li>
+      Can provide a second layer of page cache (cleancache and frontswap)
+    </li>
+    <li>
+      Pages stored by hypervisor (Xen), compressed local memory
+      (zcache) or cluster of machines (RAMster)
+    </li>
+    <li>
+      Not yet enabled in Debian kernels, and needs some thought about
+      configuration
+    </li>
+    <li>
+      Want to make it work?  See
+      <a href="https://lwn.net/Articles/454795/">https://lwn.net/Articles/454795/</a>
+      and mail debian-kernel
+    </li>
+  </ul>
+</div>
+
 <div class="slide">
   <h1>Questions?</h1>
 </div>