[libvirt-users] fstrim support in libvirt/qemu guests

Michal Privoznik mprivozn at redhat.com
Mon Nov 3 13:24:23 UTC 2014

On 01.11.2014 05:30, Dennis Jacobfeuerborn wrote:
> Hi,
> I'm trying to find out how to enable fstrim support for libvirt/qemu
> guests. Specifically I'm trying to enable this on a CentOS 7 host (qemu
> 1.5). I searched the web but only found very vague information and no
> clear documentation on the requirements or how to modify the guest xml
> to enable discard/fstrim support.
> Can someone point me in the right direction?

One thing that you'll need is the guest agent:


Then you can just use:

   # virsh domfstrim $dom


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