From mboxrd@z Thu Jan 1 00:00:00 1970 From: Randy Dunlap Subject: Re: [patch 2/2] x86: Manage ENERGY_PERF_BIAS based on cpufreq governor Date: Tue, 02 Mar 2010 16:30:49 -0800 Message-ID: <4B8DADB9.1040302@xenotime.net> References: <20100303000649.757684000@intel.com> <20100303000849.278509000@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from xenotime.net ([72.52.64.118]:35380 "HELO xenotime.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754365Ab0CCAav (ORCPT ); Tue, 2 Mar 2010 19:30:51 -0500 Received: from chimera.site ([71.245.98.113]) by xenotime.net for ; Tue, 2 Mar 2010 16:30:49 -0800 In-Reply-To: <20100303000849.278509000@intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: venkatesh.pallipadi@intel.com Cc: Ingo Molnar , H Peter Anvin , Thomas Gleixner , Len Brown , Dave Jones , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org On 03/02/10 16:06, venkatesh.pallipadi@intel.com wrote: {bah, more difficult to review an attachment, so no leading '>'} diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 8c666d8..4945add 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -749,6 +749,10 @@ and is between 256 and 4096 characters. It is defined in the file Default value is 0. Value can be changed at runtime via /selinux/enforce. + epb [X86] Control IA32_ENERGY_PERF_BIAS setting + "disable" - Kernel will not modify this MSR + <0..15> - Kernel will set this MSR to i/p static value + Should be more like: epb= [X86] Control IA32_ENERGY_PERF_BIAS setting Format: { disable | <0...15> } "disable" - Kernel will not modify this MSR <0..15> - Kernel will set this MSR to i/p static value But what is "i/p"? Use whatever word it should be, please. What do the values mean? And what does IA32 have to do with this? does it not apply to x86_64? thanks, -- ~Randy