From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261173AbTH2OjG (ORCPT ); Fri, 29 Aug 2003 10:39:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261258AbTH2OjG (ORCPT ); Fri, 29 Aug 2003 10:39:06 -0400 Received: from pc1-cwma1-5-cust4.swan.cable.ntl.com ([80.5.120.4]:39595 "EHLO dhcp23.swansea.linux.org.uk") by vger.kernel.org with ESMTP id S261173AbTH2OjE (ORCPT ); Fri, 29 Aug 2003 10:39:04 -0400 Subject: Re: Single P4, many IDE PCI cards == trouble?? From: Alan Cox To: Nick Urbanik Cc: Linux Kernel Mailing List In-Reply-To: <3F4F5C9A.5BAA1542@vtc.edu.hk> References: <3F4EA30C.CEA49F2F@vtc.edu.hk> <1062150643.26753.4.camel@dhcp23.swansea.linux.org.uk> <3F4F5C9A.5BAA1542@vtc.edu.hk> Content-Type: text/plain Content-Transfer-Encoding: 7bit Message-Id: <1062167896.27561.4.camel@dhcp23.swansea.linux.org.uk> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.3 (1.4.3-3) Date: 29 Aug 2003 15:38:17 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Gwe, 2003-08-29 at 15:00, Nick Urbanik wrote: > Is there _anyone_ who is using a number of ATA133 IDE disks (>=6), each on > its own IDE channel, on a number of PCI IDE cards, and doing so The most I know of is 8, and that was one of the people who found the shared IRQ/IDE race cases that 2.4.21 or so fixed. > > A freeze in an IRQ handler would cause that kind of thing, turning on > > the NMI watchdog might get you a trace in such a failure case - and > > that would help. > > If the NMI count is positive in /proc/interrupts, and I have nmi_watchdog=2 > in /proc/cmdline, does that mean that the NMI watchdog is turned on? If nmi watchdog trigger failure would indicate hardware problems in just about any situation I can imagine. The nmi is just that -not maskable- by software.