Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753220AbXLEPE6 (ORCPT ); Wed, 5 Dec 2007 10:04:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751613AbXLEPEv (ORCPT ); Wed, 5 Dec 2007 10:04:51 -0500 Received: from mail.gmx.net ([213.165.64.20]:49027 "HELO mail.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1750898AbXLEPEu (ORCPT ); Wed, 5 Dec 2007 10:04:50 -0500 X-Authenticated: #20450766 X-Provags-ID: V01U2FsdGVkX18+DBFHeow+GK+PgWZF4KmkaP93OxjP/a1dP1E67C xYTPKK04ll6lJ9 Date: Wed, 5 Dec 2007 16:05:06 +0100 (CET) From: Guennadi Liakhovetski To: Pavel Machek , Robert Hancock cc: linux-kernel@vger.kernel.org Subject: Re: [Timers SMP] can this machine be helped? In-Reply-To: <4756B6EC.1000103@shaw.ca> Message-ID: References: <47560A98.9080700@shaw.ca> <4756B6EC.1000103@shaw.ca> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2412 Lines: 66 On Mon, 3 Dec 2007, Pavel Machek wrote: > On Mon 2007-12-03 22:45:06, Guennadi Liakhovetski wrote: > > On Sun, 2 Dec 2007, Pavel Machek wrote: > > > > > > I compiled a .24-ish kernel for it with CONFIG_NO_HZ and > > > > CONFIG_HIGH_RES_TIMERS. To get the system boot at least sometimes I have > > > > to specify nohz=off. Then I get > > > > > > Try highres=off, too... Hehe, and even idle=poll might help. > > > > Ok, for now I've compiled a kernel with all "advanced" features off like > > hrt, nohz. Will see how it behaves. But thanks for the hints. > > Let us know... Ok, it cold-booted (after a power-off, which is usually the most difficult case for this machine) once fine. On another boot it was veeeeery slow. I have a dmesg from that boot, here're some of the first differences with a subsequent normal boot: -apm: BIOS version 1.2 Flags 0x03 (Driver version 1.16ac) +apm: BIOS version 1.2 Flags 0x0b (Driver version 1.16ac) ... Serial: 8250/16550 driver $Revision: 1.90 $ 2 ports, IRQ sharing disabled +serial 00:08: activated 00:08: ttyS0 at I/O 0x3e8 (irq = 4) is a 16550A +serial 00:09: activated 00:09: ttyS1 at I/O 0x2e8 (irq = 3) is a NS16550A ... ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx PIIX4: IDE controller (0x8086:0x7111 rev 0x01) at PCI slot 0000:00:14.1 PIIX4: not 100% native mode: will probe irqs later -PIIX4: IDE port disabled + ide0: BM-DMA at 0x58c0-0x58c7, BIOS settings: hda:pio, hdb:pio ide1: BM-DMA at 0x58c8-0x58cf, BIOS settings: hdc:pio, hdd:pio +Probing IDE interface ide0... Probing IDE interface ide1... Probing IDE interface ide0... Probing IDE interface ide1... "+" is the slow boot. A reboot helped. And I've got two soft lockups now on that new boot each for 13s (hm, it's always 13s...:-() and this time I didn't specify "clocksource=tsc" as the last time. On Wed, 5 Dec 2007, Robert Hancock wrote: > On a machine that old, you shouldn't need ACPI to detect both CPUs, it should > be able to use MPS.. Don't know the details, but remember it didn't work without ACPI. The only solution was acpi=noirq. Thanks Guennadi --- Guennadi Liakhovetski -- 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/