From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752300Ab1ILQn1 (ORCPT ); Mon, 12 Sep 2011 12:43:27 -0400 Received: from christianhoffmann.info ([88.175.101.52]:49912 "EHLO christianhoffmann.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751150Ab1ILQn0 (ORCPT ); Mon, 12 Sep 2011 12:43:26 -0400 Message-ID: <4E6E36A5.2030702@christianhoffmann.info> Date: Mon, 12 Sep 2011 18:43:17 +0200 From: Christian Hoffmann User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.21) Gecko/20110831 Lightning/1.0b2 Thunderbird/3.1.13 MIME-Version: 1.0 To: paulmck@linux.vnet.ibm.com CC: Josh Boyer , LKML Subject: Re: scheduling while atomic: swapper/0/0x10000002 References: <4E6B6624.1000406@christianhoffmann.info> <4E6B9BC1.4060000@christianhoffmann.info> <20110910195820.GC4118@linux.vnet.ibm.com> In-Reply-To: <20110910195820.GC4118@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/10/2011 09:58 PM, Paul E. McKenney wrote: > On Sat, Sep 10, 2011 at 07:17:53PM +0200, Christian Hoffmann wrote: >> On 09/10/2011 06:44 PM, Josh Boyer wrote: >>> On Sat, Sep 10, 2011 at 9:29 AM, Christian Hoffmann >>> wrote: >>>> Hi, >>>> >>>> I can see the following bug report in the kernel 3.1 rc5 dmesg: >>>> >>>> [ 0.000008] BUG: scheduling while atomic: swapper/0/0x10000002 >>>> [ 0.000012] Modules linked in: >>>> [ 0.000015] Pid: 0, comm: swapper Not tainted 3.1.0-rc5-ch+ #2 >>>> [ 0.000017] Call Trace: >>>> [ 0.000024] [] __schedule_bug+0x66/0x70 >>>> [ 0.000028] [] schedule+0x99d/0x9b0 >>>> [ 0.000032] [] ? pidmap_init+0x9f/0xdf >>>> [ 0.000035] [] __cond_resched+0x2a/0x40 >>>> [ 0.000038] [] _cond_resched+0x31/0x40 >>>> [ 0.000041] [] kmem_cache_alloc_trace+0x53/0x160 >>>> [ 0.000043] [] pidmap_init+0x9f/0xdf >>>> [ 0.000046] [] start_kernel+0x333/0x3c8 >>>> [ 0.000049] [] x86_64_start_reservations+0x132/0x136 >>>> [ 0.000051] [] x86_64_start_kernel+0x101/0x110 >>> >>> Paul McKenney has a patch that solves this oops. You can find it here: >>> >>> http://marc.info/?l=linux-kernel&m=131537669921538&w=2 >>> >>> We had discussed getting this into 3.1, but apparently that didn't >>> happen (yet?). I thought it had been sent upstream with my tested-by, >>> but I don't see it included in Linus' tree. >> >> Hi, >> >> the patch up there doesn't seem to apply cleanly to 3.1 rc5, as it >> misses the rename done in "[PATCH tip/core/rcu 23/55] rcu: Simplify >> quiescent-state accounting" >> (http://marc.info/?l=linux-kernel&m=131537654621392&w=2). > > For 3.1-rc5, you will be wanting this one: > > https://lkml.org/lkml/2011/8/19/355 Hi, yes, this applies and makes the stack disappear. Thanks, Chris