Re: [PATCH 0/7] KVM: Kernel-based Virtual Machine

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Arnd Bergmann wrote:
On Sunday 22 October 2006 19:01, Avi Kivity wrote:
While we don't have it yet, we're thinking about adding a sputop
or something similar that shows the utilization of spus. You don't
need that one, since get exactly that with the regular top, but you
might want to have a tool that prints statistics about how often
your guests drop out of the virtualisation mode, or the number
of interrupts delivered to them.

We have a debugfs interface and a kvm_stat script which shows exactly
that (including a breakdown of the reasons for the exit).
Ok, good. But with your own file system, you wouldn't need debugfs
any more and have all information about a guest in one place.
One last thing: permissions. The /dev/kvm model allows permissions to
be controlled using standard unix access methods. How do you control
access to spufs?
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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