Re: [libvirt] [PATCH] Add support for RAM filesystems for LXC

On 05/09/2012 09:49 AM, Daniel P. Berrange wrote: > From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; > > Introduce a new syntax for filesystems to allow use of a RAM > filesystem > > <filesystem type='ram'> > <source usage='1024'/> > <target dir='/mnt'/> > </filesystem> > > The usasge is in KB to limit consumption of host memory. Based on what we learned with <memory>, I think you really want: <source unit='KiB' usage='1024'/> on output, as well as allowing unit='...' for scaling of input such as <source unit='G' usage='1'/> for 2^30 bytes.

> +++ b/docs/formatdomain.html.in > @@ -1617,6 +1617,12 @@ > format will be autodetected. Only used by LXC driver > <span class="since">(since 0.9.5)</span>. > </dd> > + <dt><code>type='ram'</code></dt> > + <dd> > + An in-memory filesystem, using memory from the host OS. > + The source element has a single attribute <code>usage</code> > + which gives the memory usage limit in kilobytes. > + <span class="since"> (since 0.9.13)</span></dd> > </dl> > > The filesystem block has an optional attribute <code>accessmode</code> > @@ -1656,7 +1662,8 @@ > The resource on the host that is being accessed in the guest. The > <code>name</code> attribute must be used with > <code>type='template'</code>, and the <code>dir</code> attribute must > - be used with <code>type='mount'</code> > + be used with <code>type='mount'</code>. The <code>usage</code> attribute > + is used with <code>type='ram'</code> to set the memory limit in KB. We've already cleaned up wording like this in the docs before; this should be 'kibibytes (units of 1024 bytes)'. > + > + case VIR_DOMAIN_FS_TYPE_RAM: > + virBufferAsprintf(buf, " <source usage='%lld'/>\n", > + def->usage); > + break; Where's the .h file change that adds def->usage? -- Eric Blake eblake(a)redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org

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