Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751508AbaLBIg5 (ORCPT ); Tue, 2 Dec 2014 03:36:57 -0500 Received: from cn.fujitsu.com ([59.151.112.132]:49973 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751288AbaLBIg4 convert rfc822-to-8bit (ORCPT ); Tue, 2 Dec 2014 03:36:56 -0500 X-IronPort-AV: E=Sophos;i="5.04,848,1406563200"; d="scan'208";a="44338314" Message-ID: <547D7B05.6080403@cn.fujitsu.com> Date: Tue, 2 Dec 2014 16:40:37 +0800 From: Lai Jiangshan User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100921 Fedora/3.1.4-1.fc14 Thunderbird/3.1.4 MIME-Version: 1.0 To: CC: =?UTF-8?B?RMOibmllbCBGcmFnYQ==?= , Linus Torvalds , Linux Kernel Mailing List Subject: Re: frequent lockups in 3.18rc4 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> <20141201191431.GA17385@linux.vnet.ibm.com> In-Reply-To: <20141201191431.GA17385@linux.vnet.ibm.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT X-Originating-IP: [10.167.226.103] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/02/2014 03:14 AM, Paul E. McKenney wrote: > On Sun, Nov 30, 2014 at 11:02:43PM -0200, Dâniel 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, It is needed at lest for testing. CONFIG_TREE_PREEMPT_RCU=y with CONFIG_PREEMPT=n is needed for testing too. Please enable them (or enable them under CONFIG_RCU_TRACE=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/ > -- 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/