linux-kernel - Re: [PATCH v2 2/2] cpufreq: CPPC: Dont read counters for idle CPUs

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Message-ID: <aJpMHkrWJIyHtHL5@google.com>
Date: Mon, 11 Aug 2025 20:01:34 +0000
From: Prashant Malani <pmalani@...gle.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Viresh Kumar <viresh.kumar@...aro.org>,
	Beata Michalska <beata.michalska@....com>,
	Jie Zhan <zhanjie9@...ilicon.com>,
	Ionela Voinescu <ionela.voinescu@....com>,
	Ben Segall <bsegall@...gle.com>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Ingo Molnar <mingo@...hat.com>, Juri Lelli <juri.lelli@...hat.com>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:CPU FREQUENCY SCALING FRAMEWORK" <linux-pm@...r.kernel.org>,
	Mel Gorman <mgorman@...e.de>, Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Valentin Schneider <vschneid@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	z00813676 <zhenglifeng1@...wei.com>, sudeep.holla@....com
Subject: Re: [PATCH v2 2/2] cpufreq: CPPC: Dont read counters for idle CPUs

On Aug 11 21:19, Rafael J. Wysocki wrote:
> On Mon, Aug 11, 2025 at 8:43 PM Prashant Malani <pmalani@...gle.com> wrote:
> >
> > On Aug 11 11:35, Viresh Kumar wrote:
> > > On 06-08-25, 17:19, Prashant Malani wrote:
> > > > So, do we have consensus that the idle check is acceptable as proposed?
> > > > (Just want to make sure this thread doesn't get lost given another thread
> > > > has forked off in this conversation).
> > >
> > > I don't have any objections to this or a better solution to this.
> >
> > Thanks Viresh! Beata, can we kindly move ahead with the idle
> > optimization (which is this series), while we continue discussions for
> > the "under load" scenarios on the other thread?
> 
> I need some more time, please?
> 
> This problem is similar (if not analogous) to what happens on x86 and
> that is not handled in the cpuidle core.

My apologies! Didn't mean to rush.

Will stand by for updates.

BR,

-Prashant