Sourceone upgrade from 6.7.2 to 6.8.1

hello all,

I read the manual release notes about the release upgrades in question, but there 'a point that I can not understand.
About when I upgrade web services and native archive, requires a reboot of the server where I did upgrade of web services, but on the server where the web services I've also search services and mobile services.
I still have to restart even though I have not done upgrades search services and mobile services or do I still need to upgrade these first and then reboot the server?

Thank you very much for your answers