From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752579AbaBYCpk (ORCPT ); Mon, 24 Feb 2014 21:45:40 -0500 Received: from e28smtp03.in.ibm.com ([122.248.162.3]:39266 "EHLO e28smtp03.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750899AbaBYCpj (ORCPT ); Mon, 24 Feb 2014 21:45:39 -0500 Message-ID: <530C03C6.9080405@linux.vnet.ibm.com> Date: Tue, 25 Feb 2014 10:45:26 +0800 From: Michael wang User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: paulmck@linux.vnet.ibm.com CC: a.p.zijlstra@chello.nl, paulus@samba.org, Ingo Molnar , acme@ghostprotocols.net, Thomas Gleixner , "H. Peter Anvin" , x86@kernel.org, LKML Subject: Re: [BUG] sched: tip/master show panic while booting/rebooting References: <5302EBA3.10909@linux.vnet.ibm.com> <20140225003048.GJ8264@linux.vnet.ibm.com> In-Reply-To: <20140225003048.GJ8264@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14022502-3864-0000-0000-00000C9AA40C Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Paul On 02/25/2014 08:30 AM, Paul E. McKenney wrote: [snip] > > I don't see an opportunity for load_balance() to loop with interrupts > disabled, but maybe I am looking at the wrong code. The NMI handler > looks to me like it is diagnosing rather than being the problem. Thanks for the comment :) It was a stuck inside pick_next_task_fair(), and we already got one solution now ;-) Regards, Michael Wang > > Thanx, Paul > >> [] idle_balance+0x10f/0x1c0 >> [] pick_next_task_fair+0x11e/0x2a0 >> [] ? dequeue_task+0x73/0x90 >> [] __schedule+0x12a/0x670 >> [] schedule+0x29/0x70 >> [] worker_thread+0x1bf/0x370 >> [] ? manage_workers+0x160/0x160 >> [] kthread+0xc9/0xe0 >> [] ? flush_kthread_worker+0xb0/0xb0 >> [] ret_from_fork+0x7c/0xb0 >> [] ? flush_kthread_worker+0xb0/0xb0 >> Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffff9fffffff) > > -- > 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/ >