linux-kernel - Re: [PATCH] PM / arch: x86: Rework the MSR_IA32_ENERGY_PERF

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Message-ID: <20190321092055.GA7022@nazgul.tnic>
Date:   Thu, 21 Mar 2019 10:20:55 +0100
From:   Borislav Petkov <bp@...e.de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Len Brown <len.brown@...el.com>,
        Linux PM <linux-pm@...r.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Laura Abbott <labbott@...oraproject.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        Simon Schricker <sschricker@...e.de>,
        Hannes Reinecke <hare@...e.de>
Subject: Re: [PATCH] PM / arch: x86: Rework the MSR_IA32_ENERGY_PERF_BIAS
 handling

On Thu, Mar 21, 2019 at 08:58:07AM +0100, Peter Zijlstra wrote:
> So I hate /dev/msr with a passion. It is absolute atrocious crap.
> 
> Please, just make a real interface for this if it is important.

Yeah, and we will start converting everything using /dev/msr to real
interfaces and then taint on MSR write because, this should not have
been allowed in the first place.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--