Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932326AbVL0Ofo (ORCPT ); Tue, 27 Dec 2005 09:35:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932314AbVL0Ofo (ORCPT ); Tue, 27 Dec 2005 09:35:44 -0500 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:2443 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S932326AbVL0Ofn (ORCPT ); Tue, 27 Dec 2005 09:35:43 -0500 Date: Tue, 27 Dec 2005 15:03:25 +0100 From: Pavel Machek To: "Theodore Ts'o" , Con Kolivas , linux kernel mailing list , Dominik Brodowski , Daniel Petrini , Tony Lindgren , vatsa@in.ibm.com, ck list , Adam Belay , Zwane Mwaikambo Subject: Re: [PATCH] i386 No Idle HZ aka dynticks 051221 Message-ID: <20051227140325.GA1620@elf.ucw.cz> References: <200512210310.51084.kernel@kolivas.org> <20051225171617.GA6929@thunk.org> <20051226025525.GA6697@thunk.org> <20051226203806.GC1974@elf.ucw.cz> <20051226225246.GA9915@thunk.org> <20051226232712.GH1974@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20051226232712.GH1974@elf.ucw.cz> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1369 Lines: 33 On ?t 27-12-05 00:27:12, Pavel Machek wrote: > On Po 26-12-05 17:52:48, Theodore Ts'o wrote: > > On Mon, Dec 26, 2005 at 09:38:06PM +0100, Pavel Machek wrote: > > > Stupid IBM. I've seen it appearing/disappearing, but did not work out > > > when. > > > > > > No-C4-on-AC is bad -- if you just disconnect AC and walk away, you are > > > running without benefits of C4. Bad. Changing benchmarks depending on > > > you booting on AC or battery also look nasty. > > > > The moment you disconnect AC, it C4 automagically appears. When you > > reconnect to the AC mains, the C4 state disappears again, at least > > from the listing displayed by /proc/acpi/processor/CPU0/power. So the > > first issue you brought up isn't a problem. > > It does not seem to work like that here. I'm not sure what the exact > rules are, but I know that I sometimes have C4 and sometimes not. I > have C4 now, and it is used, even when I'm on AC power. Thinkpad > X32. Well, today it _does_ behave like Theodore described (slightly different kernel, and I'm using power supply, not docking station). Strange. Pavel -- Thanks, Sharp! - 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/