linux-kernel - Re: [PATCH 5/5] intel_pstate: delete scheduler hook in HWP mode

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Date:   Fri, 16 Jun 2017 21:27:46 -0400
From:   Len Brown <lenb@...nel.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     X86 ML <x86@...nel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Len Brown <len.brown@...el.com>
Subject: Re: [PATCH 5/5] intel_pstate: delete scheduler hook in HWP mode

On Fri, Jun 16, 2017 at 8:09 PM, Rafael J. Wysocki <rjw@...ysocki.net> wrote:
> On Wednesday, June 07, 2017 07:39:16 PM Len Brown wrote:
>> From: Len Brown <len.brown@...el.com>
>>
>> The cpufreqa/scaling_cur_freq sysfs attribute is now provided by
>> the x86 cpufreq core on all modern x86 systems, including
>> all systems supported by the intel_pstate driver.
>
> Not sure what you mean by "x86 cpufreq core"?

I refer to code that builds if (CONFIG_X86 && CONFIG_CPU_FREQ)

Since it was enough to provoke a comment form you, how about this wording?:

The cpufreq/scaling_cur_freq sysfs attribute is now provided by
shared x86 cpufreq code on modern x86 systems, including
all systems supported by the intel_pstate driver.

> Besides, I'd reorder this change with respect to patch [4/5] as this
> eliminates the hook entirely and then the "performance"-related change
> would only affect non-HWP.

I don't actually see a problem with either order,
but i'll send the refresh with the order you suggest.

thanks,
Len Brown, Intel Open Source Technology Center