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Date: Tue, 10 Jul 2018 15:41:21 +0530
From: vrbagal1 <vrbagal1@linux.vnet.ibm.com>
To: Nicholas Piggin <npiggin@gmail.com>
Cc: linux-fsdevel@vger.kernel.org,
        sachinp <sachinp@linux.vnet.ibm.com>,
        linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
        Linuxppc-dev
        <linuxppc-dev-bounces+vrbagal1=linux.vnet.ibm.com@lists.ozlabs.org>
Subject: Re: [powerpc/powervm]Oops: Kernel access of bad area, sig: 11 [#1]
 while running stress-ng
In-Reply-To: <20180710180708.6e0cd26b@roar.ozlabs.ibm.com>
References: <8595a4f915a7344210a8cc7ad6923a2b@linux.vnet.ibm.com>
 <20180710180708.6e0cd26b@roar.ozlabs.ibm.com>
Message-Id: <920d9bc6a2c3449700dec191c271bdff@linux.vnet.ibm.com>
Sender: linux-fsdevel-owner@vger.kernel.org
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On 2018-07-10 13:37, Nicholas Piggin wrote:
> On Tue, 10 Jul 2018 11:58:40 +0530
> vrbagal1 <vrbagal1@linux.vnet.ibm.com> wrote:
> 
>> Hi,
>> 
>> Observing kernel oops on Power9(ZZ) box, running on PowerVM, while
>> running stress-ng.
>> 
>> 
>> Kernel: 4.18.0-rc4
>> Machine: Power9 ZZ (PowerVM)
>> Test: Stress-ng
>> 
>> Attached is .config file
>> 
>> Traces:
>> 
>>   [12251.245209] Oops: Kernel access of bad area, sig: 11 [#1]
> 
> Can you post the lines above this? Otherwise we don't know what address
> it tried to access (without decoding the instructions and 
> reconstructing
> it from registers at least, which the XFS devs wouldn't be inclined to
> do).
> 

ah my bad.

  [12251.245179] Unable to handle kernel paging request for data at 
address 0x6000000060000000
  [12251.245199] Faulting instruction address: 0xc000000000319e2c


> And I assume there is nothing else relevant to XFS in the dmesg before
> this?

Nothing relevant in dmesg

Regards,
Venkat.

> 
> Thanks,
> Nick