linux-kernel - Re: stable: commit "cpuidle: menu: Avoid discarding useful information" causes regressions

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Message-ID: <CAJZ5v0ii-pBMj2aQmH8no920wb_XO7ReOVQmy+V=CozmFm8HfA@mail.gmail.com>
Date: Thu, 16 Oct 2025 12:05:58 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Sergey Senozhatsky <senozhatsky@...omium.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, Doug Smythies <dsmythies@...us.net>, 
	Christian Loehle <christian.loehle@....com>, "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>, Sasha Levin <sashal@...nel.org>, 
	Daniel Lezcano <daniel.lezcano@...aro.org>, linux-pm@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Tomasz Figa <tfiga@...omium.org>, stable@...r.kernel.org
Subject: Re: stable: commit "cpuidle: menu: Avoid discarding useful
 information" causes regressions

On Thu, Oct 16, 2025 at 12:00 PM Sergey Senozhatsky
<senozhatsky@...omium.org> wrote:
>
> On (25/10/16 11:48), Rafael J. Wysocki wrote:
> > All right, let's see what RAPL on that system has to say.
> >
> > Please send the output of "grep .
> > /sys/class/powercap/intel-rapl/intel-rapl:0/constraint_*"
>
> /sys/class/powercap/intel-rapl/intel-rapl:0/constraint_0_max_power_uw:6000000
> /sys/class/powercap/intel-rapl/intel-rapl:0/constraint_0_name:long_term
> /sys/class/powercap/intel-rapl/intel-rapl:0/constraint_0_power_limit_uw:6000000
> /sys/class/powercap/intel-rapl/intel-rapl:0/constraint_0_time_window_us:27983872
> /sys/class/powercap/intel-rapl/intel-rapl:0/constraint_1_max_power_uw:0
> /sys/class/powercap/intel-rapl/intel-rapl:0/constraint_1_name:short_term
> /sys/class/powercap/intel-rapl/intel-rapl:0/constraint_1_power_limit_uw:12000000
> /sys/class/powercap/intel-rapl/intel-rapl:0/constraint_1_time_window_us:976

This looks reasonable, so I'd rather not recommend playing with it.