From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758330AbZDXQRm (ORCPT ); Fri, 24 Apr 2009 12:17:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753920AbZDXQRb (ORCPT ); Fri, 24 Apr 2009 12:17:31 -0400 Received: from tomts40.bellnexxia.net ([209.226.175.97]:44729 "EHLO tomts40-srv.bellnexxia.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753862AbZDXQRa (ORCPT ); Fri, 24 Apr 2009 12:17:30 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AmwFAGp+8UlMQW1W/2dsb2JhbACBUM8Eg3QF Date: Fri, 24 Apr 2009 12:12:17 -0400 From: Mathieu Desnoyers To: Len Brown Cc: Andrew Morton , gregkh@suse.de, stable@kernel.org, cpufreq@vger.kernel.org, Ingo Molnar , rjw@sisk.pl, Ben Slusky , Dave Jones , linux-kernel@vger.kernel.org Subject: Re: [PATCH] cpufreq fix timer teardown in conservative governor (2.6.30-rc2) Message-ID: <20090424161217.GA25650@Krystal> References: <20090423140002.GA12852@Krystal> <20090423164638.3b5769c6.akpm@linux-foundation.org> <20090424043546.GB8091@Krystal> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline In-Reply-To: X-Editor: vi X-Info: http://krystal.dyndns.org:8080 X-Operating-System: Linux/2.6.21.3-grsec (i686) X-Uptime: 12:05:07 up 55 days, 12:31, 2 users, load average: 0.25, 0.30, 0.27 User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Len Brown (lenb@kernel.org) wrote: > Somebody please remind me why we are spending effort to > maintain the conservative governor instead of deleting it. > Documentation/cpu-freq/governors.txt "The CPUfreq governor "conservative", much like the "ondemand" governor, sets the CPU depending on the current usage. It differs in behaviour in that it gracefully increases and decreases the CPU speed rather than jumping to max speed the moment there is any load on the CPU. This behaviour more suitable in a battery powered environment." So better battery usage seems to be the reason why conservative lives. Mathieu > thanks, > Len Brown, Intel Open Source Technology Center > -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68