From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S968281AbdADPKW (ORCPT ); Wed, 4 Jan 2017 10:10:22 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:49019 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S968259AbdADPKM (ORCPT ); Wed, 4 Jan 2017 10:10:12 -0500 Subject: Re: ext4 filesystem corruption with 4.10-rc2 on ppc64le To: Anton Blanchard , , Michael Ellerman , Benjamin Herrenschmidt , "Paul Mackerras" , Stephen Rothwell References: <20170104161808.5ad7b4fd@kryten> CC: , , , From: Jens Axboe Message-ID: Date: Wed, 4 Jan 2017 08:09:28 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <20170104161808.5ad7b4fd@kryten> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-Originating-IP: [216.160.245.98] X-ClientProxiedBy: BLUPR14CA0079.namprd14.prod.outlook.com (10.163.209.175) To DM5PR15MB1194.namprd15.prod.outlook.com (10.173.209.12) X-MS-Office365-Filtering-Correlation-Id: 0af4c40a-6a55-4d71-3dcd-08d434b3b059 X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:(22001);SRVR:DM5PR15MB1194; 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It doesn't take much to trigger it - download a ppc64le Ubuntu > cloud image, boot it in KVM and run: > > sudo apt-get update > sudo apt-get dist-upgrade > sudo reboot > > And it never makes it back up, dying with rather severe filesystem > corruption. > > I've narrowed it down to: > > 64e1c57fa474 ("ext4: Use clean_bdev_aliases() instead of iteration") > e64855c6cfaa ("fs: Add helper to clean bdev aliases under a bh and use it") > ce98321bf7d2 ("fs: Remove unmap_underlying_metadata") > > Backing these patches out fixes the issue. Fix is going out today, I see Chandan already pointed you at it. For the other reporter, it's not an LE vs BE thing, it's a fs blocksize < page size problem. -- Jens Axboe