From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755948Ab0E1Hpu (ORCPT ); Fri, 28 May 2010 03:45:50 -0400 Received: from cantor2.suse.de ([195.135.220.15]:52037 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755476Ab0E1Hpt (ORCPT ); Fri, 28 May 2010 03:45:49 -0400 From: Thomas Renninger Organization: SUSE Products GmbH To: Len Brown Subject: Re: [linux-pm] [PATCH 8/8] intel_idle: create a native cpuidle driver for select intel processors Date: Fri, 28 May 2010 09:46:32 +0200 User-Agent: KMail/1.13.3 (Linux/2.6.31.5-0.1-desktop; KDE/4.4.3; x86_64; ; ) Cc: linux-pm@lists.linux-foundation.org, x86@kernel.org, Linux Kernel Mailing List , sfr@canb.auug.org.au References: <1274928151-30919-1-git-send-email-lenb@kernel.org> <201005271053.31087.trenn@suse.de> In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201005280946.32981.trenn@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Friday 28 May 2010 03:44:16 Len Brown wrote: > On Thu, 27 May 2010, Thomas Renninger wrote: ... > > > This driver does not yet know about cpu online/offline > > > and thus will not yet play well with cpu-hotplug. I thought this is also about soft on/offlining. > > > What means does not play well yet, suspend or manually offlining a > > core will eventually (for sure?) hang the machine? > > It means less power savings savings than optimal > for processors not present at module load time. Ok, not really sever... > > > If this is known broken, should this already be spread through > > linux-next? > > If you know somebody with a system that supports CPU hot-add > on one of the processors supported by intel_idle, and they > are willing to test linux-next, please have them contact me. Real CPU hotplug is broken with acpi processor driver as well, eventually it got addressed lately. Anyway, not sever... Thanks, Thomas