Re: [PATCH v3] cpuidle: psci: Do not suspend topology CPUs on PREEMPT_RT

From: Sebastian Andrzej Siewior
Date: Mon Jan 30 2023 - 05:04:41 EST


On 2023-01-25 11:08:04 [+0100], Ulf Hansson wrote:
> > It's the power domain sued for other devices, so we need it. Otherwise
> > other devices will keep waiting for this missing power domain provider.
>
Ach this explains my other question I had.
>
> And we are still able to use those idle states that are solely per
> CPU, which is probably nice to have. No?

If the entry/ exit latency is not known, it can be dangerous.

> Kind regards
> Uffe

Sebastian