Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751218AbWJMWQt (ORCPT ); Fri, 13 Oct 2006 18:16:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751925AbWJMWQt (ORCPT ); Fri, 13 Oct 2006 18:16:49 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:5029 "EHLO e3.ny.us.ibm.com") by vger.kernel.org with ESMTP id S1751218AbWJMWQs (ORCPT ); Fri, 13 Oct 2006 18:16:48 -0400 Date: Sat, 14 Oct 2006 03:46:24 +0530 From: Dipankar Sarma To: Lee Revell Cc: Karsten Wiese , Ingo Molnar , linux-kernel@vger.kernel.org, Thomas Gleixner , John Stultz , "Paul E. McKenney" , Arjan van de Ven Subject: Re: 2.6.18-rt1 Message-ID: <20061013221624.GD7477@in.ibm.com> Reply-To: dipankar@in.ibm.com References: <20060920141907.GA30765@elte.hu> <1159639564.4067.43.camel@mindpipe> <20060930181804.GA28768@in.ibm.com> <200610132318.02512.annabellesgarden@yahoo.de> <20061013212450.GC7477@in.ibm.com> <1160777536.4201.31.camel@mindpipe> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1160777536.4201.31.camel@mindpipe> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1120 Lines: 28 On Fri, Oct 13, 2006 at 06:12:16PM -0400, Lee Revell wrote: > On Sat, 2006-10-14 at 02:54 +0530, Dipankar Sarma wrote: > > Can you try with nmi_watchdog=0 in the kernel command line ? > > > > Paul has an NMI-safe patch for rcupreempt which I am adopting > > and testing at the moment. If this works well, I will publish > > a new patchset. > > > > The bug is too hard to hit for me to provide useful feedback. I've only > seen it once since my original report. > > FWIW, I am also seeing hard lockups every 12-24 hours but the box is > headless and I don't have the bandwidth to debug these further. It was > stable with 2.6.17-rt*. Can you try whatever you were doing with nmi_watchdog=0 ? If it is stable, then that would explain the problem. I believe Andi enabled nmi watchdog on x86_64 by default recently, that might be why we are seeing it now. Thanks Dipankar - 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/