Deployment -> Expert partitioner: Describe tmpfs and bcache (BSC#1180337)

Author: cwickert

xml/deployment_expert_partitioner_overview.xml

@@ -596,6 +596,42 @@
   </variablelist>
  </sect2>
 
+  <sect2 xml:id="sec-expert-partitioner-tmpfs">
+    <title><guimenu>Tmpfs</guimenu></title>
+    <para>
+      <!-- similar to sec-filesystems-tmpfs-->
+      tmpfs is a RAM-based virtual memory file system. It offers very fast file access and supports
+      Transparent HugePage Support (THP). The file system is temporary, which means files are not
+      stored on the hard disk but the kernel internal cache. When the file system is unmounted, all
+      data is discarded.
+    </para>
+    <para>
+      To add a tmpfs file system, click <guimenu>Add Tmpfs&hellip;</guimenu>, select the mount point
+      and optionally configure custom mount options.
+    </para>
+  </sect2>
+
+  <sect2 xml:id="sec-expert-partitioner-bache">
+    <title><guimenu>Bcache Devices</guimenu></title>
+    <para>
+      <!-- taken from sec-multitiercache-bcache -->
+      &bcache; is a Linux kernel block layer cache. It allows one or more fast disk drives (such as
+      SSDs) to act as a cache for one or more slower hard disks. &bcache; supports write-through and
+      write-back, and is independent of the file system used. By default it caches random reads and
+      writes only, which SSDs excel at. It is suitable for desktops, servers, and high end storage
+      arrays as well.
+    </para>
+    <para>
+      To set up &bcache;, select the <guimenu>Backing Device</guimenu> (the slow hard drive), the
+      <guimenu>Caching Device</guimenu> (typically a SSD) and the <guimenu>Cache Mode</guimenu>.
+      Then click <guimenu>Accept</guimenu> to apply the changes.
+    </para>
+    <para os="sles">
+      For information about the different cache modes, refer to
+      <xref linkend="sec-multitiercache-bcache"/>.
+    </para>
+  </sect2>
+
  <sect2 xml:id="sec-expert-partitioner-configure-options">
   <title>Advanced options</title>
   <para>