hm,
without digging deeper into the theme, I assume you cannot nice or 
schedule the KVM machine, as it is implemented in the kernel. So I would 
add a "CPU-consumption DoS", as kernel-mode execution has high prio. 
And, as things like scanner and audio have own groups, it makes sense to 
give a special group to the "KVM People", too. (not only temporary ....)

Corrections weclome!

Rgds,
Andreas

Anthony Liguori schrieb:
> The only harm in allowing normal users to access /dev/kvm is a potential
> memory DoS until guest swapping is implemented.  I suggest that a
> special group be made until that feature is implemented.
>

-- 
kvm: access to /dev/kvm should have a different group-ownership
https://bugs.launchpad.net/bugs/127704
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