From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756703AbYGJMu0 (ORCPT ); Thu, 10 Jul 2008 08:50:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753927AbYGJMuP (ORCPT ); Thu, 10 Jul 2008 08:50:15 -0400 Received: from yx-out-2324.google.com ([74.125.44.28]:54908 "EHLO yx-out-2324.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753883AbYGJMuN (ORCPT ); Thu, 10 Jul 2008 08:50:13 -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=adQhggVwWB9U8PqTG1EBNrnWExxIHig7NX0i9Lf2t96wXnlDKIOZ8dBcT3TcwhSNFm vaVvqyV+CowvA4bS/hU68s7Y5SLxATKTEhuYfLUbucfHzkPkVcGtPflLVYemrNWFdJ/f 52ccV46jpWRdUXIM9DeLO36Xi4LFwWsHV7Mus= Message-ID: Date: Thu, 10 Jul 2008 14:50:11 +0200 From: "Dmitry Adamushko" To: "Vegard Nossum" Subject: Re: v2.6.26-rc9: kernel BUG at kernel/sched.c:5858! Cc: Yanmin , "Rusty Russell" , "Ingo Molnar" , "Peter Zijlstra" , "Dhaval Giani" , "Gautham R Shenoy" , "Heiko Carstens" , miaox@cn.fujitsu.com, "Lai Jiangshan" , "Avi Kivity" , linux-kernel@vger.kernel.org In-Reply-To: <19f34abd0807100512y7fff3716r3ff37305e863f26@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080710115954.GA3639@damson.getinternet.no> <19f34abd0807100512y7fff3716r3ff37305e863f26@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2008/7/10 Vegard Nossum : > On Thu, Jul 10, 2008 at 1:59 PM, Vegard Nossum wrote: >> Hi, >> >> Looks like CPU hotplug still has some problems. Just got this on >> latest mainline, and I couldn't find the exact same report on LKML >> or kerneloops, maybe it can be helpful for debugging the existing >> problem(s)? >> >> lockdep: fixing up alternatives. >> ------------[ cut here ]------------ >> kernel BUG at kernel/sched.c:5858! >> invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC >> Pid: 3934, comm: bash Not tainted (2.6.26-rc9-00057-g60d678c #3) >> EIP: 0060:[] EFLAGS: 00210046 CPU: 0 >> EIP is at migration_call+0x495/0x4d0 >> EAX: 00000000 EBX: c0803f00 ECX: f6bd0000 EDX: 017b0000 >> ESI: e7d24fb0 EDI: c1fb3f00 EBP: f62e7e78 ESP: f62e7e48 >> DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 >> Process bash (pid: 3934, ti=f62e6000 task=f60fbfc0 task.ti=f62e6000) >> Stack: 00000000 c06ddf70 f62e7e6c 00200246 c0803f00 00000001 c1fb3f00 f62e7e6c >> c0581fcf c074ec70 ffffffff 00000000 f62e7e98 c014d5a7 00000001 00000007 >> c074ecf4 ffffffff 00000001 e7c86f90 f62e7eac c014d619 ffffffff 00000000 >> Call Trace: >> [] ? preempt_schedule+0x3f/0x50 >> [] ? notifier_call_chain+0x37/0x70 >> [] ? __raw_notifier_call_chain+0x19/0x20 >> [] ? raw_notifier_call_chain+0x1a/0x20 >> [] ? _cpu_down+0x148/0x240 >> [] ? cpu_maps_update_begin+0xf/0x20 >> [] ? cpu_down+0x2b/0x40 >> [] ? store_online+0x39/0x80 >> [] ? store_online+0x0/0x80 >> [] ? sysdev_store+0x2b/0x40 >> [] ? sysfs_write_file+0xa2/0x100 >> [] ? vfs_write+0x96/0x130 >> [] ? sysfs_write_file+0x0/0x100 >> [] ? sys_write+0x3d/0x70 >> [] ? sysenter_past_esp+0x78/0xd1 >> ======================= >> Code: 45 e8 e8 2f 53 00 00 b8 01 00 00 00 e9 a2 fb ff ff bb 60 36 59 c0 eb 02 8b >> 1b 89 f8 ff 53 18 85 c0 89 c6 74 f3 90 e9 89 fe ff ff <0f> 0b eb fe 8d b4 26 00 >> 00 00 00 e8 8b 82 bd ff 89 f0 50 9d 0f >> EIP: [] migration_call+0x495/0x4d0 SS:ESP 0068:f62e7e48 >> >> >> Oh, I just saw >> >> commit dc7fab8b3bb388c57c6c4a43ba68c8a32ca25204 >> Author: Dmitry Adamushko >> Date: Thu Jul 10 00:32:40 2008 +0200 >> >> sched: fix cpu hotplug >> >> will apply and retry. Is this likely to fix the oops I saw, though? > > Nope, I get the same thing (just 2 lines offset): No, it shouldn't fix this particular problem. Does a patch from Miao Xie available via the link below makes this problem disappear? Both bugs are likely to have the same cause. http://lkml.org/lkml/2008/7/7/75 -- Best regards, Dmitry Adamushko