linux-kernel - [RFT][PATCH 0/2] cpufreq: intel_pstate: Handle _PPC updates on global turbo disable/enable

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Message-ID: <9956076.F4luUDm1Dq@aspire.rjw.lan>
Date:   Fri, 01 Mar 2019 13:43:00 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux PM <linux-pm@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Chen Yu <yu.c.chen@...el.com>,
        Gabriele Mazzotta <gabriele.mzt@...il.com>
Subject: [RFT][PATCH 0/2] cpufreq: intel_pstate: Handle _PPC updates on global turbo disable/enable

Hi All,

This is how I would fix the issue reported in BZ 200759 (see this patch series
from Yu too: https://marc.info/?l=linux-pm&m=155137672924029&w=2).

Patch [1/2] causes intel_pstate to update all policies if it gets a _PPC change
notification and sees a global turbo disable/enable change.

Patch [2/2] makes it update cpuinfo.max_freq for all policies in those cases.

The patches here have not been tested yet, so testing would be much appreciated.

Of course, comments are welcome too!

Thanks,
Rafael