We have SLES 11 SP3 installed on a Blade server. In this OS we has also create KVM vm's and more than 5 vm's are installed and running. Now I would like to upgrade the Host OS from SLES 11 SP3 to SLES 11 SP4. I would like to do this either online or with SLES 11 SP4 CD and expect minimal issues with upgrade. Is this possible ?