Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932274AbVLUEVM (ORCPT ); Tue, 20 Dec 2005 23:21:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932277AbVLUEVM (ORCPT ); Tue, 20 Dec 2005 23:21:12 -0500 Received: from pne-smtpout1-sn2.hy.skanova.net ([81.228.8.83]:53731 "EHLO pne-smtpout1-sn2.hy.skanova.net") by vger.kernel.org with ESMTP id S932274AbVLUEVL (ORCPT ); Tue, 20 Dec 2005 23:21:11 -0500 Date: Wed, 21 Dec 2005 05:21:01 +0100 From: Voluspa To: torvalds@osdl.org Cc: linux-kernel@vger.kernel.org Subject: Re: Linux 2.6.15-rc6 Message-Id: <20051221052101.1acb6cc4.lista1@telia.com> X-Mailer: Sylpheed version 1.0.4 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1629 Lines: 42 I know that C1 isn't much of a power save, but that's what my amd64 notebook provides, and it get used in 2.6.14: loke@sleipner:~$ cat /proc/acpi/processor/CPU0/power active state: C1 max_cstate: C8 bus master activity: 00000000 states: *C1: type[C1] promotion[--] demotion[--] latency[000] usage[01399981] Not so in 2.6.15-rc2 to -rc6 (report http://marc.theaimsgroup.com/?l=linux-kernel&m=113498252000221&w=2 ) Culprit is the following commit that I humbly ask to be removed/rewritten: root@sleipner:/home/git/linux-2.6# git bisect bad 2203d6ed448ff3b777ee6bb614a53e686b483e5b is first bad commit diff-tree 2203d6ed448ff3b777ee6bb614a53e686b483e5b (from 2656c076e31a3ce3ab2a987a578e7122dc2af51d) Author: Linus Torvalds Date: Fri Nov 18 07:29:51 2005 -0800 Fix ACPI processor power block initialization Properly clear the memory, and set "pr->flags.power" only if a C2 or deeper state is valid (to make the code match both the comment and previous behaviour). This fixes a boot-time lockup reported by Maneesh Soni when using "maxcpus=1". Acked-by: Maneesh Soni Signed-off-by: Linus Torvalds :040000 040000 52be621b960ae192b36acf778c966d78ff5edbe2 04c183ce141dab8cdff049c1dae379104b637ed4 M drivers Mvh Mats Johannesson -- - 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/