On Thu, Aug 19, 2010 at 10:07:14PM -1000, Zachary Amsden wrote: > This patch set implements full TSC virtualization, with both > trapping and passthrough modes, and intelligent mode switching. > As a result, TSC will never go backwards, we are stable against > guest re-calibration attempts, VM reset, and migration. For guests > which require it, the TSC khz can even be preserved on migration > to a new host. > > The TSC will never be trapped on UP systems unless the host TSC > actually runs faster than the guest; other conditions, including > bad hardware and changing speeds are accomodated by using catchup > mode to keep the guest passthrough TSC in line with the host clock. > > What is still needed on top of this is a way to force TSC > trapping, or disable it entirely, for benchmarking purposes. > I refrained from adding that last bit because it wasn't clear > whether the best thing to do is a global 'force TSC trapping' / > 'force TSC passthrough' / 'intelligent choice', or if this control > should be on a per-VM level, via an ioctl(), module parameter, > or sysfs. > > John and Thomas I have cc'd on this because it may be relevant to > their interests and I always appreciate feedback, especially on > a change set as large and complex as this. > > Enjoy. This time, there are no howler monkeys. I've included > all the feedback I got from previous rounds of this and more. Applied 1-19, thanks. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
