linux-kernel - Re: [PATCH 1/2] CPUFREQ: Enable acpi-cpufreq driver for VIA/Centaur CPUs

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Date:	Tue, 9 Jun 2009 00:48:30 +0100
From:	Matthew Garrett <mjg@...hat.com>
To:	"Michael S. Zick" <lkml@...ethan.org>
Cc:	Harald Welte <HaraldWelte@...tech.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Duane Griffin <duaneg@...da.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: [PATCH 1/2] CPUFREQ: Enable acpi-cpufreq driver for
	VIA/Centaur CPUs

On Mon, Jun 08, 2009 at 04:15:22PM -0500, Michael S. Zick wrote:

> Phooey, close but no cigar - - -
> 
> root@...1:/sys/devices/system/cpu/cpu0/cpufreq# cat scaling_available_frequencies
> 1200000 1000000 800000 600000 400000
> root@...1:/sys/devices/system/cpu/cpu0/cpufreq# cat stats/time_in_state
> 1200000 3281
> 1000000 120
> 800000 130
> 600000 234
> 400000 52980
> root@...1:/sys/devices/system/cpu/cpu0/cpufreq
> 
> It loads, it appears to work, but that lowest 400Mhz has ACPI entries
> even though this is a 600Mhz..1200Mhz chip.

If the BIOS tables claim it then it's likely Windows uses it on the same 
hardware. What's the stability like with the ACPI code?

-- 
Matthew Garrett | mjg59@...f.ucam.org
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