On Mon, Nov 13, 2017 at 06:06:02PM +0800, Quan Xu wrote: > From: Yang Zhang <yang.zhang.wz@xxxxxxxxx> > > Implement a generic idle poll which resembles the functionality > found in arch/. Provide weak arch_cpu_idle_poll function which > can be overridden by the architecture code if needed. No, we want less of those magic hooks, not more. > Interrupts arrive which may not cause a reschedule in idle loops. > In KVM guest, this costs several VM-exit/VM-entry cycles, VM-entry > for interrupts and VM-exit immediately. Also this becomes more > expensive than bare metal. Add a generic idle poll before enter > real idle path. When a reschedule event is pending, we can bypass > the real idle path. Why not do a HV specific idle driver?
