Re: [PATCH V2 3/3] cpufreq: CPPC: Add support for frequency invariance

[Peter Zijlstra]

On Thu, Jun 17, 2021 at 04:49:36PM +0530, Viresh Kumar wrote:
> Peter: Can you help here on this ? Lemme try to explain a bit here:
> 
> We are starting an irq-work (in cppc cpufreq driver) from
> scheduler_tick()->arch_scale_freq_tick(). What will happen if the driver doesn't
> take care of CPU hotplug explicitly and make sure this work isn't queued again
> from the next tick.
> 
> Is it important for user to make sure it gets rid of the irq-work during hotplug
> here ?

irq-work is flushed on hotplug, see smpcfd_dying_cpu().