linux-kernel - Re: [PATCH 2/3] x86/tsc: Fix erroneous TSC rate on Skylake Xeon

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Message-ID: <CAJvTdKm=CY5C=QAFXsuyGvqm1O85XjDwQK-gpXdLEYNUpeR5dw@mail.gmail.com>
Date:   Tue, 2 Jan 2018 16:09:38 -0500
From:   Len Brown <lenb@...nel.org>
To:     Prarit Bhargava <prarit@...hat.com>
Cc:     X86 ML <x86@...nel.org>, Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org, Len Brown <len.brown@...el.com>,
        stable@...r.kernel.org
Subject: Re: [PATCH 2/3] x86/tsc: Fix erroneous TSC rate on Skylake Xeon

On Tue, Jan 2, 2018 at 10:36 AM, Prarit Bhargava <prarit@...hat.com> wrote:
>
>
> On 12/22/2017 12:27 AM, Len Brown wrote:
>> From: Len Brown <len.brown@...el.com>
>>
>> Linux-4.9 added INTEL_FAM6_SKYLAKE_X to native_calibrate_tsc():

>
> Sorry, Len I didn't realize you had sent this multiple times.
>
> I lifted this code directly from tools/power/x86/turbostat/turbostat.c:4155
> -- is that code incorrect too?

yes, also a bug in turbostat -- fix is in the turbostat queue.

-- 
Len Brown, Intel Open Source Technology Center