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Date:   Fri, 22 Mar 2019 17:43:39 +0100
From:   Borislav Petkov <>
To:     Thomas Renninger <>
Cc:     "Rafael J. Wysocki" <>, x86 <>,
        LKML <>,
        Len Brown <>,
        Linux PM <>,
        Srinivas Pandruvada <>,
        Laura Abbott <>,
        Thomas Gleixner <>,
        Peter Zijlstra <>,
        Ingo Molnar <>,
        Simon Schricker <>,
        Hannes Reinecke <>
Subject: Re: [PATCH 1/2] PM / arch: x86: Rework the MSR_IA32_ENERGY_PERF_BIAS

On Fri, Mar 22, 2019 at 05:27:43PM +0100, Thomas Renninger wrote:
> Thanks Rafael for your quick look at and all the time you spend for this!
> A /sys userspace knob will certainly not be enough for us.
> You'll need a tool installed fixing this.

We won't pick up the second patch converting to the sysfs interface of
course - only the first one. The second patch is beginning the slow
phasing out of the direct /dev/msr access.


Good mailing practices for 400: avoid top-posting and trim the reply.

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