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

On 17-06-21, 14:22, Peter Zijlstra wrote:

On Thu, Jun 17, 2021 at 04:49:36PM +0530, Viresh Kumar wrote:

quoted

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().

Thanks Peter.

-- 
viresh