linux-kernel - Re: [PATCH v4 0/2] cpufreq: intel_pstate: Implement passive mode with HWP enabled

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Message-ID: <24a3011a9004bdbd7a37c029f9c2153f3db61476.camel@linux.intel.com>
Date:   Sun, 02 Aug 2020 11:39:08 -0700
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     Doug Smythies <dsmythies@...us.net>
Cc:     'Linux Documentation' <linux-doc@...r.kernel.org>,
        'LKML' <linux-kernel@...r.kernel.org>,
        'Peter Zijlstra' <peterz@...radead.org>,
        'Giovanni Gherdovich' <ggherdovich@...e.cz>,
        'Francisco Jerez' <francisco.jerez.plata@...el.com>,
        'Linux PM' <linux-pm@...r.kernel.org>,
        "'Rafael J. Wysocki'" <rjw@...ysocki.net>
Subject: Re: [PATCH v4 0/2] cpufreq: intel_pstate: Implement passive mode
 with HWP enabled

On Sun, 2020-08-02 at 07:00 -0700, Doug Smythies wrote:
> On 2020.08.01 09:40 Srinivas Pandruvada wrote:
> > > On Monday, July 27, 2020 5:13:40 PM CEST Rafael J. Wysocki wrote:
> > > > On Thursday, July 16, 2020 7:37:04 PM CEST Rafael J. Wysocki
> > > > wrote:
> > > > > This really is a v2 of this patch:
> > > > > 
> > > > > https://patchwork.kernel.org/patch/11663271/
> > > > > 
> > > > > with an extra preceding cleanup patch to avoid making
> > > > > unrelated
> > > > > changes in the
> > > > > [2/2].
> > I applied this series along with
> > [PATCH] cpufreq: intel_pstate: Fix EPP setting via sysfs in active
> > mode
> > on 5.8 latest master (On top of raw epp patchset).
> 
> Hi Srinivas,
Hi Doug,

> 
> Would you be kind enough to provide a "git log --oneline" output
> of what you did.

69dd9b2b11cd (HEAD -> 5-9-devel) cpufreq: intel_pstate: Implement
passive mode with HWP enabled
63efaa01b06a cpufreq: intel_pstate: Fix EPP setting via sysfs in active
mode
e11e0a2edf83 cpufreq: intel_pstate: Rearrange the storing of new EPP
values
93c3fd6a315c cpufreq: intel_pstate: Avoid enabling HWP if EPP is not
supported
7cef1dd371c3 cpufreq: intel_pstate: Clean up aperf_mperf_shift
description
a3248d8d3a11 cpufreq: intel_pstate: Supply struct attribute description
for get_aperf_mperf_shift()
f52b6b075b07 cpufreq: intel_pstate: Fix static checker warning for epp
variable
4a59d6be0774 cpufreq: intel_pstate: Allow raw energy performance
preference value
7b34b5acdcc6 cpufreq: intel_pstate: Allow enable/disable energy
efficiency
ac3a0c847296 (origin/master, origin/HEAD, master) Merge
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Thanks,
Srinivas

> 
> I have been trying unsuccessfully to apply the patches,
> so somewhere I obviously missed something.
> 
> > When intel_pstate=passive from kernel command line then it is fine,
> > no
> > crash. But switch dynamically, crashed:
> 
> I'll try to repeat, if I can get an actual kernel.
> 
> > Attached crash.txt. I may need to try your linux-pm tree.
> 
> I also tried the linux-pm tree, same.
> ... Doug
> 
>