linux-kernel - Re: [PATCH v3 3/3] Documentation: intel_pstate: Add base

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Date:   Mon, 15 Oct 2018 08:49:24 -0700
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Jonathan Corbet <corbet@....net>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Robert Moore <robert.moore@...el.com>,
        "Schmauss, Erik" <erik.schmauss@...el.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>, devel@...ica.org,
        Prashanth Prakash <pprakash@...eaurora.org>,
        George Cherian <george.cherian@...ium.com>
Subject: Re: [PATCH v3 3/3] Documentation: intel_pstate: Add base_frequency
 information

On Mon, 2018-10-15 at 10:53 +0200, Rafael J. Wysocki wrote:
> On Fri, Oct 12, 2018 at 6:44 PM Srinivas Pandruvada
> <srinivas.pandruvada@...ux.intel.com> wrote:
> > 
> > Updated documentation to explain base_frequency attribute.
> > 
> > Signed-off-by: Srinivas Pandruvada <
> > srinivas.pandruvada@...ux.intel.com>
> > ---
> >  Documentation/admin-guide/pm/intel_pstate.rst | 4 ++++
> >  1 file changed, 4 insertions(+)
> > 
> > diff --git a/Documentation/admin-guide/pm/intel_pstate.rst
> > b/Documentation/admin-guide/pm/intel_pstate.rst
> > index 8f1d3de449b5..14a5505e073e 100644
> > --- a/Documentation/admin-guide/pm/intel_pstate.rst
> > +++ b/Documentation/admin-guide/pm/intel_pstate.rst
> > @@ -465,6 +465,10 @@ Next, the following policy attributes have
> > special meaning if
> >         policy for the time interval between the last two
> > invocations of the
> >         driver's utilization update callback by the CPU scheduler
> > for that CPU.
> > 
> > +``base_frequency``
> > +       When present, shows the base frequency of the CPU. Any
> > frequency above
> > +       this will be in the turbo frequency range.
> > +
> 
> This isn't entirely correct, because base_frequency is not present in
> the passive mode (and it is not present for the other drivers for
> that
> matter).
That's why it said, "when present". This keeps door open to add to
other modes too in future if needed.

Thanks,
Srinivas

> 
> >  The meaning of these attributes in the `passive mode <Passive
> > Mode_>`_ is the
> >  same as for other scaling drivers.
> 
> Instead, I would say:
> 
> "One more policy attribute is present if the `HWP feature is enabled
> in the processor <Active Mode With HWP_>`_:"
> 
> here and I would add the description of the attribute below.
> 
> Thanks,
> Rafael