Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261613AbVEOLkQ (ORCPT ); Sun, 15 May 2005 07:40:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262787AbVEOLkQ (ORCPT ); Sun, 15 May 2005 07:40:16 -0400 Received: from one.firstfloor.org ([213.235.205.2]:6785 "EHLO one.firstfloor.org") by vger.kernel.org with ESMTP id S261613AbVEOLkF (ORCPT ); Sun, 15 May 2005 07:40:05 -0400 To: Alexander Nyberg Cc: Andrew Morton , Dave Jones , linux-kernel@vger.kernel.org Subject: Re: tickle nmi watchdog whilst doing serial writes. References: <20050513184806.GA24166@redhat.com> <20050514065753.GA28213@redhat.com> <20050514000723.73bd6e5a.akpm@osdl.org> <200505140631.59336.tomlins@cam.org> <1116067987.1183.9.camel@localhost.localdomain> From: Andi Kleen Date: Sun, 15 May 2005 13:40:00 +0200 In-Reply-To: <1116067987.1183.9.camel@localhost.localdomain> (Alexander Nyberg's message of "Sat, 14 May 2005 12:53:07 +0200") Message-ID: User-Agent: Gnus/5.110002 (No Gnus v0.2) Emacs/21.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 751 Lines: 19 Alexander Nyberg writes: > > But uhm, it should take at least 5 seconds of no-interrupts before the > NMI watchdog decides the box is dead so this is kind of weird. There is a bug somewhere that makes it sometimes expire faster. I found only one bug so far - touch_nmi_watchdog has a race (fixed now in -mm*). You can try if it still happens with the next -mm. Somehow i doubt it is the race though because it should be too unlikely to trigger this. Could be some other bug too. -Andi - 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/