Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932276AbaLATOm (ORCPT ); Mon, 1 Dec 2014 14:14:42 -0500 Received: from e37.co.us.ibm.com ([32.97.110.158]:49888 "EHLO e37.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932254AbaLATOj (ORCPT ); Mon, 1 Dec 2014 14:14:39 -0500 Date: Mon, 1 Dec 2014 11:14:31 -0800 From: "Paul E. McKenney" To: =?iso-8859-1?Q?D=E2niel?= Fraga Cc: Linus Torvalds , Linux Kernel Mailing List Subject: Re: frequent lockups in 3.18rc4 Message-ID: <20141201191431.GA17385@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20141126024032.GA13246@redhat.com> <20141126225745.GA30346@redhat.com> <20141127225637.GA24019@redhat.com> <547b8a45.6e608c0a.20f9.1002@mx.google.com> <547bbe36.48548c0a.105c.779c@mx.google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <547bbe36.48548c0a.105c.779c@mx.google.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14120119-0025-0000-0000-00000687BFFB Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Nov 30, 2014 at 11:02:43PM -0200, D?niel Fraga wrote: > On Sun, 30 Nov 2014 16:21:19 -0800 > Linus Torvalds wrote: > > > Maybe you'll have to turn off RCU_CPU_STALL_VERBOSE first. > > > > Although I think you should be able to just edit the .config file, > > delete the like that says > > > > CONFIG_TREE_PREEMPT_RCU=y > > > > and then just do a "make oldconfig", and then verify that > > TREE_PREEMPT_RCU hasn't been re-enabled by some dependency. But it > > shouldn't have, and that "make oldconfig" should get rid of anything > > that depends on TREE_PREEMPT_RCU. > > Ok, I did exactly that, but CONFIG_TREE_PREEMPT_RCU is > re-enabled. I talked with Pranith Kumar and he suggested I could just > disable preemption (No Forced Preemption (Server)) and that's the only > way to disable CONFIG_TREE_PREEMPT_RCU. If it would help to have !CONFIG_TREE_PREEMPT_RCU with CONFIG_PREEMPT=y, please let me know and I will create a patch that forces this. (Not mainline material, but if it helps with debug...) Thanx, Paul > Now I'll try to make the system freeze, then I'll send > you the Call trace. > > Thanks. > > -- > Linux 3.17.0: Shuffling Zombie Juror > http://www.youtube.com/DanielFragaBR > http://exchangewar.info > Bitcoin: 12H6661yoLDUZaYPdah6urZS5WiXwTAUgL > -- > 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/ -- 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/