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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 3 Jul 2018 12:39:14 -0400 Received: from b01ledav005.gho.pok.ibm.com (b01ledav005.gho.pok.ibm.com [9.57.199.110]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w63GdDcK9044330 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 3 Jul 2018 16:39:13 GMT Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9B9BBAE060; Tue, 3 Jul 2018 12:38:56 -0400 (EDT) Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5897AAE05F; Tue, 3 Jul 2018 12:38:51 -0400 (EDT) Received: from [9.79.197.55] (unknown [9.79.197.55]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 3 Jul 2018 12:38:51 -0400 (EDT) Subject: Re: Oops in kmem_cache_free() via bioset_exit() (was Re: [next-20180601][nvme][ppc] Kernel Oops is triggered when creating lvm snapshots on nvme disks) From: Abdul Haleem To: Michael Ellerman Cc: linuxppc-dev , linux-fsdevel , linux-next , linux-kernel , linux-scsi , Stephen Rothwell , sachinp , sim , manvanth , Brian King , linux-block@vger.kernel.org, Kent Overstreet , Jens Axboe Date: Tue, 03 Jul 2018 22:09:06 +0530 In-Reply-To: <87a7rf55vy.fsf@concordia.ellerman.id.au> References: <1530003645.24245.7.camel@abdul.in.ibm.com> <87d0wd7jph.fsf@concordia.ellerman.id.au> <1530176707.24245.12.camel@abdul.in.ibm.com> <87a7rf55vy.fsf@concordia.ellerman.id.au> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 18070316-0052-0000-0000-00000308756B X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009301; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01056019; UDB=6.00541679; IPR=6.00833941; MB=3.00021978; MTD=3.00000008; XFM=3.00000015; UTC=2018-07-03 16:39:17 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18070316-0053-0000-0000-00005D3B4A55 Message-Id: <1530635946.24245.15.camel@abdul.in.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-07-03_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=974 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1807030189 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2018-06-29 at 00:42 +1000, Michael Ellerman wrote: > Kent, Jens, > > This looks like it might be related to the recent bioset changes? > > cheers > > Abdul Haleem writes: > > On Tue, 2018-06-26 at 23:36 +1000, Michael Ellerman wrote: > >> Abdul Haleem writes: > ... > > I was able to reproduce again with slub_debug=FZP and DEBUG_INFO enabled > > on 4.17.0-rc7-next-20180601, but not much traces other than the Oops stack trace > > Are you still testing on that revision? It's nearly a month old. > > Please try to reproduce on mainline or today's linux-next. Problem is not reproducible on 4.18.0-rc3 mainline and today's next kernel -- Regard's Abdul Haleem IBM Linux Technology Centre