Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760663Ab0FQTCJ (ORCPT ); Thu, 17 Jun 2010 15:02:09 -0400 Received: from vms173009pub.verizon.net ([206.46.173.9]:22711 "EHLO vms173009pub.verizon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757354Ab0FQTCH (ORCPT ); Thu, 17 Jun 2010 15:02:07 -0400 Date: Thu, 17 Jun 2010 15:02:03 -0400 (EDT) From: Len Brown X-X-Sender: lenb@localhost.localdomain To: Victor Lowther Cc: Linux Power Management List , Linux Kernel Mailing List , "linux-acpi@vger.kernel.org" Subject: Re: [linux-pm] RFC: /sys/power/policy_preference In-reply-to: <0F1C0B07-60D6-405B-890B-F9C320820CA5@gmail.com> Message-id: References: <0F1C0B07-60D6-405B-890B-F9C320820CA5@gmail.com> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-version: 1.0 Content-type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1194 Lines: 28 > On Jun 16, 2010, at 4:05 PM, Len Brown wrote: > > > Create /sys/power/policy_preference, giving user-space > > the ability to express its preference for kernel based > > power vs. performance decisions in a single place. > > > > This gives kernel sub-systems and drivers a central place > > to discover this system-wide policy preference. > > It also allows user-space to not have to be updated > > every time a sub-system or driver adds a new power/perf knob. > > I would prefer documenting all the current knobs and adding them to pm-utils > so that pm-powersave knows about and can manage them. Once that is done, > creating arbitrary powersave levels should be fairly simple. The idea here is to not require user-space to need updating whenever a future knob is invented. We can do a great job at documenting the past, but a poor job of documenting the future:-) cheers, Len Brown, Intel Open Source Technolgy Center -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/