Based on what you stated, I assume this VPS is running on OpenVZ? If so, I doubt it will ever see newer kernel features, in part due to OpenVZ hosts relying on ancient LTS kernel branches and also due to OpenVZ "optimizations", whereby kernel features that use extra resources to enable just get disabled. Or, if your lucky they'll give you a button to re-enable them for youe container on an ad-hoc basis.
Heads up, $20 yearly and similar KVM deals are becoming more common, and you can run any kernel you want in KVM :P
Heads up, $20 yearly and similar KVM deals are becoming more common, and you can run any kernel you want in KVM :P