Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261279AbTEYFjS (ORCPT ); Sun, 25 May 2003 01:39:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261352AbTEYFjS (ORCPT ); Sun, 25 May 2003 01:39:18 -0400 Received: from pcp701542pcs.bowie01.md.comcast.net ([68.50.82.18]:59325 "EHLO lucifer.gotontheinter.net") by vger.kernel.org with ESMTP id S261279AbTEYFjR (ORCPT ); Sun, 25 May 2003 01:39:17 -0400 Subject: Re: [RFC] Fix NMI watchdog documentation From: Disconnect To: lkml In-Reply-To: References: <3ECFC2D6.2020007@gmx.net> <200305250329.h4P3TGoH004620@turing-police.cc.vt.edu> <200305250448.h4P4mqoH005720@turing-police.cc.vt.edu> Content-Type: text/plain Organization: Message-Id: <1053841936.1177.5.camel@slappy> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.4 Date: 25 May 2003 01:52:16 -0400 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1921 Lines: 44 On Sun, 2003-05-25 at 01:03, Zwane Mwaikambo wrote: > On Sun, 25 May 2003 Valdis.Kletnieks@vt.edu wrote: > > > On Sat, 24 May 2003 23:36:26 EDT, Zwane Mwaikambo said: > > > > > > Dell Latitude with broken BIOS detected. Refusing to enable the local APIC. > > > > > It's known broken with that configuration and hence blacklisted. > > > > Yes, I know it's blacklisted. The question I intended to ask was "Is the > > entire concept of IOAPIC irretrievably scrozzled on this machine, or is there > > sufficient minimum functionality to get nmi_watchdog working?" > > You don't have an IOAPIC at all, but the Local APIC has been known to > cause problems. So forget about nmi_watchdog. > > Zwane I was reading that code the other day (just out of curiosity, believe it or not) and I'm wondering how recently that has been tested - most of the blacklist/oddness workarounds listed in dmi_scan.c are model-specific, but the APIC entry is any Dell Inspiron or Latitude. I'm going to remove the test tomorrow sometime and see what happens - lots has changed since the Inspiron 8000, including a migration to p4-mobile, so its worth seeing if the newer Dells are fixed. If so, I'll submit a patch to make that more model-specific (probably I'll just add a whitelist function - no_local_apic_kills_bios or some such; seems better than listing every dell inspiron individually..) I'm encouraged by the complete lack of APM or any of the 'enter bios while running' options present on the older laptops; according to the comments, even if the APIC kills the bios on entry/exit, it won't matter since you can't trigger it to begin with.. -- Disconnect - 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/