[libvirt] cache=none

[Stefan]

> 
>> * Is it generally a bad idea to use XFS with KVM ?
> 
> I don't know of any problems with using XFS, there was a bug a long while
> back with a combo of AIO + sparse files, but that's long since fixed.
> 

There are several warnings using XFS with KVM because of the intensive
Write-Caching. Are these warnings obsolete ? cache=none in libvirtd.conf
is not necessary anymore (sorry I'm a kvm/libvir-beginner) ?

Stefan