From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <47B7ACBE.1090904@linux.vnet.ibm.com> Date: Sun, 17 Feb 2008 09:10:46 +0530 From: Kamalesh Babulal MIME-Version: 1.0 Subject: Re: [BUG] 2.6.25-rc2-mm1 - kernel oops while bootup on s390x References: <20080216002522.9c4bd0fb.akpm@linux-foundation.org> <47B70C3A.4050600@linux.vnet.ibm.com> <20080216114527.48408288.akpm@linux-foundation.org> In-Reply-To: Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org List-Archive: List-Post: To: Thomas Gleixner Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux390@de.ibm.com, linux-s390@vger.kernel.org, Andy Whitcroft List-ID: Thomas Gleixner wrote: > On Sat, 16 Feb 2008, Thomas Gleixner wrote: >> On Sat, 16 Feb 2008, Andrew Morton wrote: >>>> The 2.6.25-rc2-mm1 kernel panic's while boot up on the s390x >>>> >>>> Unable to handle kernel pointer dereference at virtual kernel address = 0000000000 >>>> 000000 >>>> Oops: 0004 #1=A8 SMP >>> First question is: does this happen in current mainline? This is not happening with the current mainline 2.6.24.{1,2}. >>> >>> If not, it would be useful if someone could test futex-fix-init-order.p= atch >>> and futex-runtime-enable-pi-and-robust-functionality.patch on curent >>> mainline, because those are planned for 2.6.25. >> See: http://lkml.org/lkml/2008/2/16/109 >> >> It unearthed a BUG in the S390 exception fixup tables :) >=20 > Oops, wrong reference. >=20 > http://lkml.org/lkml/2008/2/16/95 >=20 > Thanks, > tglx 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 see= m to cause the kernel panic. Unable to handle kernel pointer dereference at virtual kernel address 00000= 00000 000000 Oops: 0004 #1=A8 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 0000000000000= 000 0000000000000000 0000000000000001 0000000000000000 00000000004d0= 764 0000000000000000 00000000004d8768 0000000000000000 000000003f83b= db0 0000000000000040 0000000000343950 00000000000627e4 000000003f83b= db0 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>=A8 0x3f83bda8) <00000000004bdeec>=A8 init+0x30/0x104 <00000000004b0c40>=A8 kernel_init+0x1e0/0x370 <000000000001a5c6>=A8 kernel_thread_starter+0x6/0xc <000000000001a5c0>=A8 kernel_thread_starter+0x0/0xc <4>--- end trace 561bb236c800851f =A8--- note: swapper1=A8 exited with preempt_count 1 Kernel panic - not syncing: Attempted to kill init! --=20 Thanks & Regards, Kamalesh Babulal, Linux Technology Center, IBM, ISTL.