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

[Michal Privoznik]

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:

   http://wiki.libvirt.org/page/Qemu_guest_agent

Then you can just use:

   # virsh domfstrim $dom

Michal