Re: [KVM timekeeping 11/35] Add helper functions for time computation

[Glauber Costa]

On Thu, Aug 19, 2010 at 10:07:25PM -1000, Zachary Amsden wrote:
> Add a helper function to compute the kernel time and convert nanoseconds
> back to CPU specific cycles.  Note that these must not be called in preemptible
> context, as that would mean the kernel could enter software suspend state,
> which would cause non-atomic operation.
> 
> Also, convert the KVM_SET_CLOCK / KVM_GET_CLOCK ioctls to use the kernel
> time helper, these should be bootbased as well.
This is one of the things I believe should be applied right now.
Maybe we want a cut version of this patch, that exposes this API while
adjusting KVM_SET_CLOCK / KVM_GET_CLOCK to get in early rather than late?
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