From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp06.au.ibm.com (E23SMTP06.au.ibm.com [202.81.18.175]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp06.au.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 290A8DDF50 for ; Wed, 9 Apr 2008 03:45:08 +1000 (EST) Received: from sd0109e.au.ibm.com (d23rh905.au.ibm.com [202.81.18.225]) by e23smtp06.au.ibm.com (8.13.1/8.13.1) with ESMTP id m38HikQZ013450 for ; Wed, 9 Apr 2008 03:44:46 +1000 Received: from d23av04.au.ibm.com (d23av04.au.ibm.com [9.190.235.139]) by sd0109e.au.ibm.com (8.13.8/8.13.8/NCO v8.7) with ESMTP id m38HmwuI188068 for ; Wed, 9 Apr 2008 03:48:58 +1000 Received: from d23av04.au.ibm.com (loopback [127.0.0.1]) by d23av04.au.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m38Hj5o8003008 for ; Wed, 9 Apr 2008 03:45:05 +1000 Message-ID: <47FBAF1E.1040405@linux.vnet.ibm.com> Date: Tue, 08 Apr 2008 23:15:02 +0530 From: Kamalesh Babulal MIME-Version: 1.0 To: Paul Mackerras Subject: Re: [BUG] 2.6.25-rc2-git4 - Regression Kernel oops while running kernbench and tbench on powerpc References: <47BC40BC.3040405@linux.vnet.ibm.com> <18427.11023.8067.795279@cargo.ozlabs.ibm.com> <47FB5C5A.5020104@linux.vnet.ibm.com> <18427.27360.30297.84859@cargo.ozlabs.ibm.com> In-Reply-To: <18427.27360.30297.84859@cargo.ozlabs.ibm.com> Content-Type: text/plain; charset=us-ascii Cc: kernel list , linuxppc-dev@ozlabs.org, linux-next@vger.kernel.org, nacc@us.ibm.com, Andrew Morton , Balbir Singh List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Paul Mackerras wrote: > Kamalesh Babulal writes: > >> The kernel oops after applying the patch. Some time it takes more than >> one run to reproduce it, it was reproducible in the second run this >> time. >> >> Unrecoverable exception 4100 at c000000000008c8c >> Oops: Unrecoverable exception, sig: 6 [#1] >> SMP NR_CPUS=128 NUMA pSeries >> Modules linked in: >> NIP: c000000000008c8c LR: 000000000ff0135c CTR: 000000000ff012f0 >> REGS: c000000772343bb0 TRAP: 4100 Not tainted (2.6.25-rc8-autotest) >> MSR: 8000000000001030 CR: 44044228 XER: 00000000 >> TASK = c00000077cfa0900[13437] 'cc1' THREAD: c000000772340000 CPU: 2 >> GPR00: 0000000000004000 c000000772343e30 00000000000000bb 000000000000d032 >> GPR04: 00000000000000bb 0000000000000400 000000000000000a 0000000000000002 >> GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 >> GPR12: 0000000000000000 c000000000734000 0000000000000064 00000000ffe6df08 >> GPR16: 00000000105b0000 00000000105b0000 0000000010440000 00000000105b0000 >> GPR20: 00000000ffe6e008 00000000105b0000 00000000105b0000 000000000000000a >> GPR24: 000000000ffec408 0000000000000001 00000000ffe6ddca 0000000000000400 >> GPR28: 000000000ffec408 00000000f7ff8000 000000000ffebff4 0000000000000400 >> NIP [c000000000008c8c] restore+0x8c/0xc0 >> LR [000000000ff0135c] 0xff0135c >> Call Trace: >> [c000000772343e30] [c000000000008cd4] do_work+0x14/0x2c (unreliable) >> Instruction dump: >> 7c840078 7c810164 70604000 41820028 60000000 7c4c42e6 e88d01f0 f84d01f0 >> 7c841050 e84d01e8 7c422214 f84d01e8 7c7b03a6 e84101a0 7c4ff120 >> > The exception happened at c...8c8c but you looked at c...8cdc with > gdb. What's at c...8c8c? > >> please let me know if you need more information. > > The .config would be useful, but don't spam everyone on cc with it, > just send it to me privately. > > Paul. Hi Paul, Similar call trace was seen in 2.6.24-rc3-git2 kernel while bootup, I have attached the boot log to bugzilla (http://bugzilla.kernel.org/attachment.cgi?id=15666&action=view). When looking for the last good one, we found that the kernel oops seems to be reproducible from the 2.6.24-rc8-git3 kernel onwards. Thanks to nishanth for pointing it out, Please let me know if you need more information. -- Thanks & Regards, Kamalesh Babulal, Linux Technology Center, IBM, ISTL.