From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752844AbYBROJd (ORCPT ); Mon, 18 Feb 2008 09:09:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751130AbYBROJY (ORCPT ); Mon, 18 Feb 2008 09:09:24 -0500 Received: from E23SMTP03.au.ibm.com ([202.81.18.172]:46836 "EHLO e23smtp03.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751475AbYBROJX (ORCPT ); Mon, 18 Feb 2008 09:09:23 -0500 Date: Mon, 18 Feb 2008 19:38:04 +0530 From: Kamalesh Babulal To: Heiko Carstens Cc: Kamalesh Babulal , Thomas Gleixner , Andrew Morton , linux-kernel@vger.kernel.org, linux390@de.ibm.com, linux-s390@vger.kernel.org, Andy Whitcroft Subject: Re: [BUG] 2.6.25-rc2-mm1 - kernel oops while bootup on s390x Message-ID: <20080218140804.GA32151@linux.vnet.ibm.com> Reply-To: Kamalesh Babulal References: <20080216002522.9c4bd0fb.akpm@linux-foundation.org> <47B70C3A.4050600@linux.vnet.ibm.com> <20080216114527.48408288.akpm@linux-foundation.org> <47B7ACBE.1090904@linux.vnet.ibm.com> <20080217090616.GA8030@osiris.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20080217090616.GA8030@osiris.ibm.com> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Feb 17, 2008 at 10:06:16AM +0100, Heiko Carstens wrote: > On Sun, Feb 17, 2008 at 09:10:46AM +0530, Kamalesh Babulal wrote: > > To conform the patches causing the panic, I tested the 2.6.24.2 kernel with the futex-fix-init-order.patch and > > futex-runtime-enable-pi-and-robust-functionality.patch applied and they seem to cause the kernel > > panic. > > > > Unable to handle kernel pointer dereference at virtual kernel address 0000000000 > > 000000 > > Oops: 0004 #1¨ SMP > > Modules linked in: > > CPU: 0 Not tainted 2.6.25-rc2-mm1-autotest #1 > > Process swapper (pid: 1, task: 000000003f830000, ksp: 000000003f83ba48) > > Krnl PSW : 0704a00180000000 000000000024b2be (futex_atomic_cmpxchg_std+0x12/0x28 > > ) > > R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:2 CC:2 PM:0 EA:3 > > Krnl GPRS: 0000000000000074 00000000fffffff2 0000000000000000 0000000000000000 > > 0000000000000000 0000000000000001 0000000000000000 00000000004d0764 > > 0000000000000000 00000000004d8768 0000000000000000 000000003f83bdb0 > > 0000000000000040 0000000000343950 00000000000627e4 000000003f83bdb0 > > Krnl Code: 000000000024b2b2: b90400bf lgr %r11,%r15 > > 000000000024b2b6: a718fff2 lhi %r1,-14 > > 000000000024b2ba: b2790100 sacf 256 > > >000000000024b2be: ba342000 cs %r3,%r4,0(%r2) > > 000000000024b2c2: 1813 lr %r1,%r3 > > 000000000024b2c4: b2790000 sacf 0 > > 000000000024b2c8: b9140021 lgfr %r2,%r1 > > 000000000024b2cc: e3b0b0700004 lg %r11,112(%r11) > > Call Trace: > > (<000000003f83bda8>¨ 0x3f83bda8) > > <00000000004bdeec>¨ init+0x30/0x104 > > <00000000004b0c40>¨ kernel_init+0x1e0/0x370 > > <000000000001a5c6>¨ kernel_thread_starter+0x6/0xc > > <000000000001a5c0>¨ kernel_thread_starter+0x0/0xc > > > > <4>--- end trace 561bb236c800851f ¨--- > > note: swapper1¨ exited with preempt_count 1 > > Kernel panic - not syncing: Attempted to kill init! Hi Heiko, Thanks for the patch, I have tested patch, it fixes the bootup panic. Tested-by: Kamalesh Babulal Index: linux-2.6/arch/s390/lib/uaccess_std.c =================================================================== --- linux-2.6.orig/arch/s390/lib/uaccess_std.c +++ linux-2.6/arch/s390/lib/uaccess_std.c @@ -293,8 +293,8 @@ int futex_atomic_cmpxchg_std(int __user asm volatile( " sacf 256\n" - " cs %1,%4,0(%5)\n" - "0: lr %0,%1\n" + "0: cs %1,%4,0(%5)\n" + " lr %0,%1\n" "1: sacf 0\n" EX_TABLE(0b,1b) : "=d" (ret), "+d" (oldval), "=m" (*uaddr) -- -- Thanks & Regards, Kamalesh Babulal, Linux Technology Center, IBM, ISTL.