[virt-tools-list] Enabling fstrim within VM client

[Richard Taubo]

Hi!

As mentioned in an earlier mail I have installed 
KVM on a logical volume like this (CentOS 7):
[#] lvcreate -L 300G -n lv_vm1 VolGroup
[#] virt-install --name=vm1.mydomain.com \ 
	--disk path=/dev/VolGroup/lv_vm1 \ 
	--ram=8192 --os-type=linux --os-variant=rhel7 \ 
	--vcpus=8 --check-cpu \ 
	--network bridge:br0 --nographics \
	--location=/usr/local/src/linux_isos/CENTOS7/CentOS-7.0-1406-x86_64-Minimal.iso \ 
	--extra-args 'ks=http://www.mydomain.com/anaconda-ks.cfg ksdevice=eth0 \ 
	ip=192.168.19.2 netmask=255.255.255.192 dns=8.8.8.8 gateway=192.168.19.1 console=ttyS0,115200n8 serial’

I would like to run fstrim from within the VM client (I have fstrim working on the VM host machine).
Running fstrim from within the VM gives me errors like this:
	"fstrim: /usr: FITRIM ioctl failed: Operation not supported"

Is it possible to run fstrim on the VM client with the setup described above?

Thanks for any feedback!

Best regards,
Richard Taubo