Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757508AbYFPNxw (ORCPT ); Mon, 16 Jun 2008 09:53:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753940AbYFPNxp (ORCPT ); Mon, 16 Jun 2008 09:53:45 -0400 Received: from rv-out-0506.google.com ([209.85.198.238]:62207 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753674AbYFPNxn (ORCPT ); Mon, 16 Jun 2008 09:53:43 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=g3LvSVBgFpu0iJjt/7uUBgXCChpmRKphUpit2bJksK9Sa638jf4QY89l+DwZEiEEhr nMcLD3ZX5tkfQAZl1/1PIStVmJMegKj3ud496h9KHVX/WXIvtiABO0IfFi3u+ZxNgayo lrtfgsOCIRCRdVTPyU1LdlibYwqgBkq2EhyAk= Message-ID: <19f34abd0806160653w2e92e43o4fb20e198bcb4615@mail.gmail.com> Date: Mon, 16 Jun 2008 15:53:43 +0200 From: "Vegard Nossum" To: "Alexey Dobriyan" Subject: Re: [Bug #10815] 2.6.26-rc4: RIP find_pid_ns+0x6b/0xa0 Cc: "Linus Torvalds" , "Paul E. McKenney" , "Oleg Nesterov" , "Adrian Bunk" , "Rafael J. Wysocki" , "Linux Kernel Mailing List" In-Reply-To: <20080616030154.GA7445@martell.zuzino.mipt.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080614144200.GA26421@linux.vnet.ibm.com> <20080614181212.GB26421@linux.vnet.ibm.com> <20080614194338.GA4820@martell.zuzino.mipt.ru> <20080615033001.GE26421@linux.vnet.ibm.com> <20080615162150.GA8289@martell.zuzino.mipt.ru> <20080615181710.GA17915@linux.vnet.ibm.com> <20080615232754.GD17915@linux.vnet.ibm.com> <20080616030154.GA7445@martell.zuzino.mipt.ru> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1642 Lines: 39 On Mon, Jun 16, 2008 at 5:01 AM, Alexey Dobriyan wrote: > On Sun, Jun 15, 2008 at 04:38:24PM -0700, Linus Torvalds wrote: >> On Sun, 15 Jun 2008, Paul E. McKenney wrote: >> > >> > If that is the right thing to do. I would feel better about it if I >> > could reproduce the failure. >> >> Is there some configuration thing that might make it happen for Alexey but >> not for you? The only obvious one is the normal PREEMPT thing, but >> PREEMPT_RCU obviously depends on that, so there must be something else. >> >> CONFIG_SMP? CONFIG_NO_HZ? CONFIG_[RT|FAIR]_GROUP_SCHED? There's a number >> of config options that change scheduling details.. > > The only way I can "fix" rcutorture here is SMP=n (not maxcpus=1!). > > Among things tried and do not matter are NO_HZ, HIGH_RES_TIMERS, turning off > debugging options (one by one and in bulk), DEBUG_PER_CPU_MAPS, HZ tweaks, > SCHED_MC. > > All of this doesn't help, but SMP=n does. Maybe this is a stupid suggestion, but SLUB _is_ involved here (in poisoning the object when it is freed). Do you have SLUB_DEBUG_ON=y or did you check whether it matters if you have these options on or off? Vegard -- "The animistic metaphor of the bug that maliciously sneaked in while the programmer was not looking is intellectually dishonest as it disguises that the error is the programmer's own creation." -- E. W. Dijkstra, EWD1036 -- 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/