Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934024AbXEEWls (ORCPT ); Sat, 5 May 2007 18:41:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754565AbXEEWls (ORCPT ); Sat, 5 May 2007 18:41:48 -0400 Received: from buniche.hst.terra.com.br ([200.176.10.197]:43268 "EHLO buniche.hst.terra.com.br" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754522AbXEEWlr (ORCPT ); Sat, 5 May 2007 18:41:47 -0400 X-Terra-Karma: -2% X-Terra-Hash: 3e869178a76154f6a2872012165b7c55 Message-ID: <463D0808.6030500@centralinf.com.br> Date: Sat, 05 May 2007 19:41:12 -0300 From: "Guilherme M. Schroeder" User-Agent: Thunderbird 2.0.0.0 (X11/20070326) MIME-Version: 1.0 To: john stultz CC: Andi Kleen , Andrew Morton , lkml , Thomas Gleixner Subject: Re: [PATCH] Blacklist Dell Optiplex 320 from using the HPET References: <1178314144.6094.7.camel@localhost.localdomain> <200705050118.34711.ak@suse.de> <1178321228.6094.34.camel@localhost.localdomain> In-Reply-To: <1178321228.6094.34.camel@localhost.localdomain> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3129 Lines: 75 The lspci output: 00:00.0 Host bridge: ATI Technologies Inc Radeon Xpress 200 Host Bridge (rev 01) 00:01.0 PCI bridge: ATI Technologies Inc RS480 PCI Bridge 00:12.0 SATA controller: ATI Technologies Inc SB600 Non-Raid-5 SATA 00:13.0 USB Controller: ATI Technologies Inc SB600 USB (OHCI0) 00:13.1 USB Controller: ATI Technologies Inc SB600 USB (OHCI1) 00:13.2 USB Controller: ATI Technologies Inc SB600 USB (OHCI2) 00:13.3 USB Controller: ATI Technologies Inc SB600 USB (OHCI3) 00:13.4 USB Controller: ATI Technologies Inc SB600 USB (OHCI4) 00:13.5 USB Controller: ATI Technologies Inc SB600 USB Controller (EHCI) 00:14.0 SMBus: ATI Technologies Inc SB600 SMBus (rev 13) 00:14.1 IDE interface: ATI Technologies Inc SB600 IDE 00:14.2 Audio device: ATI Technologies Inc SB600 Azalia 00:14.3 ISA bridge: ATI Technologies Inc SB600 PCI to LPC Bridge 00:14.4 PCI bridge: ATI Technologies Inc SB600 PCI to PCI Bridge 01:05.0 VGA compatible controller: ATI Technologies Inc RC410 [Radeon Xpress 200] 02:09.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02) And what about the patch? there's a final version to try? Thanks. john stultz wrote: > On Sat, 2007-05-05 at 01:18 +0200, Andi Kleen wrote: >> On Friday 04 May 2007 23:29:04 john stultz wrote: >>> One of the 2.6.21 regressions was Guilherme's problem seeing his box >>> lock up when the system detected an unstable TSC and dropped back to >>> using the HPET. >>> >>> In digging deeper, we found the HPET is not actually incrementing on >>> this system. And in fact, the reason why this issue just cropped up was >>> because of Thomas's clocksource watchdog code was comparing the TSC to >>> the HPET (which wasn't moving) and thought the TSC was broken. >>> >>> Anyway, Guliherme checked for a BIOS update and did not find one, so >>> I've added a DMI blacklist against his system so the HPET is not used. >>> >>> Many thanks to Guilherme for the slow and laborious testing that finally >>> narrowed down this issue. >> Before going to hard to maintain DMI black lists we should first check >> if it's a more general problem and can't it be solved better? Most likely >> that system isn't the one with this issue and I don't want to apply >> DMI patches forever. > > We can give it a whirl, I just didn't want to add yet another "compare > with some other counter that may or may not work" check. In this case, > probably reading three times in a row and getting the same result would > be a clearly broken box. > > >> In particular: what lspci chipset does it have? If it's Intel it might be >> worth checking the datasheet if there is some "HPET stop" bit -- perhaps it >> could be fixed up. > > Guilherme: Could you provide lspci output? > > >> We seem to have a couple of Intel systems recently with HPET trouble. > > Ok, I wasn't aware it was a common issue. > > thanks > -john > > > - 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/