linux-kernel - Re: [PATCH v2] powercap: Add Power Limit4 support

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Date:   Tue, 14 Jul 2020 17:13:32 -0700
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Sumeet Pawnikar <sumeet.r.pawnikar@...el.com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        "Zhang, Rui" <rui.zhang@...el.com>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Shevchenko, Andriy" <andriy.shevchenko@...el.com>
Subject: Re: [PATCH v2] powercap: Add Power Limit4 support

On Tue, 2020-07-14 at 15:21 +0200, Rafael J. Wysocki wrote:
> > 

[...]

> On Tue, Jul 14, 2020 at 10:22 AM Sumeet Pawnikar
> <sumeet.r.pawnikar@...el.com> wrote:
> 
> Srinivas, does the patch look good to you?

Some minor comments then Summet can add my 

Reviewed-and-tested-by: Srinivas Pandruvada <
srinivas.pandruvada@...ux.intel.com>

> > ---
> > Changes in v2:
> >  - Addressed review comments from Rafael.
> >  - Made the commit message more clearer.
> >  - Updated powercap documentation.
> > ---
> > 

[...]

> > 0,1).
> > +Depending on different power zones, the Intel RAPL technology
> > allows
> > +one or multiple constraints like short term, long term and peak
> > power,
> > +with different time windows to be applied to each power zone.
I think better to spell out that time window is not applicable to "peak
power". Otherwise someone will send a bug report.


[...]

> >  static int rapl_msr_probe(struct platform_device *pdev)
> >  {
> >         int ret;
> > +       const struct x86_cpu_id *id =
> > x86_match_cpu(pl4_support_ids);

To match coding style in this file:
	const struct x86_cpu_id *id = x86_match_cpu(pl4_support_ids);
        int ret;

> >         rapl_msr_priv.read_raw = rapl_msr_read_raw;

Thanks,
Srinivas