linux-kernel - Re: v4.8-rc1: thinkpad x60: running at low frequency even during kernel build

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Date:   Fri, 4 Nov 2016 23:20:53 +0000
From:   "Pandruvada, Srinivas" <srinivas.pandruvada@...el.com>
To:     "pavel@....cz" <pavel@....cz>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Zhang, Rui" <rui.zhang@...el.com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>,
        "viresh.kumar@...aro.org" <viresh.kumar@...aro.org>,
        "ibm-acpi-devel@...ts.sourceforge.net" 
        <ibm-acpi-devel@...ts.sourceforge.net>,
        "ibm-acpi@....eng.br" <ibm-acpi@....eng.br>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: v4.8-rc1: thinkpad x60: running at low frequency even during
 kernel build

On Fri, 2016-11-04 at 23:16 +0100, Pavel Machek wrote:
> Hi!
> 

[...]

> So we seem to have thermal or ACPI regression in v4.9-rc3.
> 
It is possible. Can you add either add printk
in acpi_processor_ppc_has_changed() or use ftrace and see do you get to
these functions

acpi_processor_ppc_init()
acpi_processor_ppc_has_changed()
acpi_processor_ppc_notifier()

?

When temperature limit is reached acpi_processor_ppc_notifier() should
be called.

Thanks,
Srinivas