linux-kernel - Re: [PATCH 07/15] cpufreq: ondemand: Simplify idle cputime granularity test

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Message-ID: <CAJZ5v0gfT1A9OtEzeyp0MJ7JmrPJXF0PWL-8dSdtJXp4pAE8fA@mail.gmail.com>
Date: Tue, 20 Jan 2026 13:32:50 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Frederic Weisbecker <frederic@...nel.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, LKML <linux-kernel@...r.kernel.org>, 
	"Christophe Leroy (CS GROUP)" <chleroy@...nel.org>, Alexander Gordeev <agordeev@...ux.ibm.com>, 
	Anna-Maria Behnsen <anna-maria@...utronix.de>, Ben Segall <bsegall@...gle.com>, 
	Boqun Feng <boqun.feng@...il.com>, Christian Borntraeger <borntraeger@...ux.ibm.com>, 
	Dietmar Eggemann <dietmar.eggemann@....com>, Heiko Carstens <hca@...ux.ibm.com>, 
	Ingo Molnar <mingo@...hat.com>, Jan Kiszka <jan.kiszka@...mens.com>, 
	Joel Fernandes <joelagnelf@...dia.com>, Juri Lelli <juri.lelli@...hat.com>, 
	Kieran Bingham <kbingham@...nel.org>, Madhavan Srinivasan <maddy@...ux.ibm.com>, Mel Gorman <mgorman@...e.de>, 
	Michael Ellerman <mpe@...erman.id.au>, Neeraj Upadhyay <neeraj.upadhyay@...nel.org>, 
	Nicholas Piggin <npiggin@...il.com>, "Paul E . McKenney" <paulmck@...nel.org>, 
	Peter Zijlstra <peterz@...radead.org>, Steven Rostedt <rostedt@...dmis.org>, 
	Sven Schnelle <svens@...ux.ibm.com>, Thomas Gleixner <tglx@...utronix.de>, 
	Uladzislau Rezki <urezki@...il.com>, Valentin Schneider <vschneid@...hat.com>, 
	Vasily Gorbik <gor@...ux.ibm.com>, Vincent Guittot <vincent.guittot@...aro.org>, 
	Viresh Kumar <viresh.kumar@...aro.org>, Xin Zhao <jackzxcui1989@....com>, 
	linux-pm@...r.kernel.org, linux-s390@...r.kernel.org, 
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 07/15] cpufreq: ondemand: Simplify idle cputime
 granularity test

On Mon, Jan 19, 2026 at 11:07 PM Frederic Weisbecker
<frederic@...nel.org> wrote:
>
> Le Mon, Jan 19, 2026 at 01:30:07PM +0100, Rafael J. Wysocki a écrit :
> > On Fri, Jan 16, 2026 at 3:53 PM Frederic Weisbecker <frederic@...nel.org> wrote:
> > >
> > > cpufreq calls get_cpu_idle_time_us() just to know if idle cputime
> > > accounting has a nanoseconds granularity.
> > >
> > > Use the appropriate indicator instead to make that deduction.
> > >
> > > Signed-off-by: Frederic Weisbecker <frederic@...nel.org>
> >
> > Acked-by: Rafael J. Wysocki (Intel) <rafael@...nel.org>
> >
> > or please let me know if you want me to take this patch.
>
> The patch is standalone but the rest of the patchset depends on it.
> Now I don't target this patchset for v6.20-rc1.
>
> So if you manage to sneak this patch in for v6.20-rc1, it works because
> I'll rebase on -rc1. Otherwise I'll need to keep it to avoid breaking
> some code assumptions.
>
> What do you think?

It can go into -rc1.