linux-kernel - Re: 37afb0003242 ("cpufreq: intel_pstate: Use ACPI perf configuration") makes intel

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Message-ID: <1447779990.2778.47.camel@spandruv-desk3.jf.intel.com>
Date:	Tue, 17 Nov 2015 09:06:30 -0800
From:	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Borislav Petkov <bp@...en8.de>,
	Kristen Carlson Accardi <kristen@...ux.intel.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>
Subject: Re: 37afb0003242 ("cpufreq: intel_pstate: Use ACPI perf
 configuration") makes intel_pstate kaputt

On Tue, 2015-11-17 at 15:38 +0100, Rafael J. Wysocki wrote:
> On Tuesday, November 17, 2015 10:09:47 AM Borislav Petkov wrote:
> > Hi,
> > 

[...]
> > during boot.

Also can you try with processor.ignore_ppc=1 in kernel command line.

Thanks,
Srinivas
> > 
> > When I boot with "intel_pstate=no_acpi" it boosts normally to 3.4GHz and
> > above and turbostat says:
> > 
> >      CPU Avg_MHz   %Busy Bzy_MHz TSC_MHz
> >        -    3392   99.92    3400    2895
> >        0    3395   99.96    3400    2897
> >        1    3390   99.88    3400    2895
> >        2    3391   99.89    3400    2895
> >        3    3391   99.95    3400    2893
> > 
> > which is what it should be saying. :)
> 
> Well, sorry for the breakage.
> 
> acpidump output would help to diagnose this I suppose.
> 
> Thanks,
> Rafael
> 
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