Increase container volume(disk) size

I am wondering if you could give me some pointerss on a docker issue that I am facing. I am trying to increase the default fs size for containers created on OEL 7.1/docker 1.6.1 combination. I have tried setting

DOCKER_STORAGE_OPTIONS= --storage-opt dm.basesize=20G

in /etc/sysconfig/docker-storage

and also followed the instructions on the below link for reseting the sparse file size

https://jpetazzo.github.io/2014/01/29/docker-device-mapper-resize/

but even after the above, my ‘docker info’ is showing 'Data Space Total: 107.4 GB’ and new container’s default size is 10G. Any pointers?.