Messages in this thread | | | Date | Fri, 20 Aug 2010 14:34:41 -0300 | From | Glauber Costa <> | Subject | Re: [KVM timekeeping 11/35] Add helper functions for time computation |
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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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