[fedora-virt] stop ksm on the fly?

[Tom Horsley <tom horsley att net>]

I see ksmd using 60% cpu on my kvm host which is running
many different totally different linux distros as KVMs.
It seems likely to me that ksm will be of no value on this
machine, and I could use the cpu time for the VMs themselves :-).

My question is this: Can I stop ksmd without breaking the
existing VMs? What is the best way to turn it off
"on the fly"? (Or is "service ksmd stop" perfectly
safe)?