Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756310AbYFYJLF (ORCPT ); Wed, 25 Jun 2008 05:11:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754356AbYFYJKx (ORCPT ); Wed, 25 Jun 2008 05:10:53 -0400 Received: from E23SMTP01.au.ibm.com ([202.81.18.162]:52442 "EHLO e23smtp01.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754506AbYFYJKw (ORCPT ); Wed, 25 Jun 2008 05:10:52 -0400 Date: Wed, 25 Jun 2008 02:04:00 -0700 From: "Paul E. McKenney" To: Ingo Molnar Cc: Alexey Dobriyan , Linus Torvalds , Oleg Nesterov , Adrian Bunk , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org Subject: Re: [Bug #10815] 2.6.26-rc4: RIP find_pid_ns+0x6b/0xa0 Message-ID: <20080625090400.GB11325@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20080615232754.GD17915@linux.vnet.ibm.com> <20080616030154.GA7445@martell.zuzino.mipt.ru> <20080616033126.GF17915@linux.vnet.ibm.com> <20080616034659.GA7600@martell.zuzino.mipt.ru> <20080617034228.GA18217@linux.vnet.ibm.com> <20080624005053.GA4827@martell.zuzino.mipt.ru> <20080624120404.GA7978@linux.vnet.ibm.com> <20080624210812.GA27486@linux.vnet.ibm.com> <20080624211547.GB27452@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080624211547.GB27452@elte.hu> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1382 Lines: 35 On Tue, Jun 24, 2008 at 11:15:47PM +0200, Ingo Molnar wrote: > > * Paul E. McKenney wrote: > > > > > Also Core 2 Duo, x86_64 [1] > > > > > > > > Race is wide -- 60 seconds of rcutorture is enough. > > > > This is rcutorture by itself, or in parallel with LTP/kernbench? > > > > (I have mostly been running on 4-CPU boxes without failure either way, > > so will try a dual-CPU box.) > > FYI, i've been running rcutorture for days on lots of testboxes ranging > all across the x86 spectrum from single CPU, through dual-core, to > dual-socket, dual-socket HT, 8-way and 16-way - both 32-bit and 64-bit > x86. > > Not a single failure has been detected in thousands of bootups of random > kernels (rcu-preempt + rcutorture was a frequent combination tested). I > added a WARN_ON() to rcutorture failures so it should show up very > clearly. > > This makes me suspect that it might be some special environment issue - > gcc for example. I'm using gcc 4.2.2 on most of the testboxes. And running rcutorture overnight on an Opteron system (9.7M updates) showed no failures. Thanx, Paul -- 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/