Re: [PATCH v6 2/3] cpu-throttle: implement vCPU throttle

The use of atomics in this patch and the previous requires careful review by an expert on proper use of atomics.

[PATCH v6 2/3] cpu-throttle: implement vCPU throttle

From: Hyman Huang(黄勇) Impose dirty restraint on vCPU by kicking it and sleep as the auto-converge does during migration, but just kick the specified vCPU instead, not all vCPUs of vm. Start a thread to track the dirtylimit status and adjust the throttle pencentage dynamically depend on current a