linux-kernel - [PATCH 0/4] Frequency invariance fixes for x86

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Date:   Thu, 16 Apr 2020 07:47:41 +0200
From:   Giovanni Gherdovich <ggherdovich@...e.cz>
To:     Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...e.de>, Len Brown <lenb@...nel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>
Cc:     x86@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Mel Gorman <mgorman@...hsingularity.net>,
        Doug Smythies <dsmythies@...us.net>,
        Like Xu <like.xu@...ux.intel.com>,
        Neil Rickert <nwr10cst-oslnx@...oo.com>,
        Chris Wilson <chris@...is-wilson.co.uk>,
        Giovanni Gherdovich <ggherdovich@...e.cz>
Subject: [PATCH 0/4] Frequency invariance fixes for x86

Patches 1-3 address bugs in the current frequency invariance support for x86,
including the incompatibility with cpu0 hotplug reported by Chris Wilson at
https://lore.kernel.org/lkml/158556634294.3228.4889951961483021094@build.alporthouse.com/
and the issue with CPUs that have less than 4 cores pointed out earlier
today by Like Xu at
https://lore.kernel.org/lkml/20200416021210.170736-1-like.xu@linux.intel.com/ 

Patch 4 is a minor code reorganization.

Giovanni Gherdovich (3):
  x86, sched: Bail out of frequency invariance if base frequency is
    unknown
  x86, sched: Account for CPUs with less than 4 cores in freq.
    invariance
  x86, sched: Move check for CPU type to caller function

Peter Zijlstra (Intel) (1):
  x86, sched: Don't enable static key when starting secondary CPUs

 arch/x86/kernel/smpboot.c | 47 +++++++++++++++++++++++++++++++++--------------
 1 file changed, 33 insertions(+), 14 deletions(-)

-- 
2.16.4