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Document the memory balloon device

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* formatdomain.html.in: Document <memballoon> element
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Daniel P. Berrange 2010-07-21 11:53:56 +01:00
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@ -1506,6 +1506,53 @@ qemu-kvm -net nic,model=? /dev/null
</dd>
</dl>
<h4><a name="elementsMemBalloon">Memory balloon device</a></h4>
<p>
A virtual memory balloon device is added to all Xen and KVM/QEMU
guests. It will be seen as <code>memballoon</code> element.
It will be automatically added when appropriate, so there is no
need to explicitly add this element in the guest XML unless a
specific PCI slot needs to be assigned.
<span class="since">Since 0.8.3, Xen, QEMU and KVM only</span>
</p>
<p>
Example automatically added device with KVM
</p>
<pre>
...
&lt;devices&gt;
&lt;memballoon model='virtio'/&gt;
&lt;/devices&gt;
...</pre>
<p>
Example manually added device with static PCI slot 2 requested
</p>
<pre>
...
&lt;devices&gt;
&lt;watchdog model='virtio'/&gt;
&lt;address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/&gt;
&lt;/devices&gt;
&lt;/domain&gt;</pre>
<dl>
<dt><code>model</code></dt>
<dd>
<p>
The required <code>model</code> attribute specifies what type
of balloon device is provided. Valid values are specific to
the virtualization platform
</p>
<ul>
<li>'virtio' &mdash; default with QEMU/KVM</li>
<li>'xen' &mdash; default with Xen</li>
</ul>
</dd>
</dl>
<h2><a name="examples">Example configs</a></h2>
<p>