Messages in this thread | | | Date | Mon, 23 Aug 2010 14:58:49 -1000 | From | Zachary Amsden <> | Subject | Re: [KVM timekeeping 11/35] Add helper functions for time computation |
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On 08/20/2010 07:34 AM, Glauber Costa wrote: > 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? >
The first half of the series, at least, is good to go upstream and ready for backport. The trapping and later stuff obviously needs to get some upstream testing.
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