From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936357AbcJRBI1 (ORCPT ); Mon, 17 Oct 2016 21:08:27 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:50917 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S934873AbcJRBIV (ORCPT ); Mon, 17 Oct 2016 21:08:21 -0400 Date: Mon, 17 Oct 2016 21:07:00 -0400 From: Chris Mason To: Dave Jones CC: Al Viro , Josef Bacik , "David Sterba" , , Linux Kernel Subject: Re: btrfs bio linked list corruption. Message-ID: <20161018010659.GA88177@clm-mbp.thefacebook.com> Mail-Followup-To: Chris Mason , Dave Jones , Al Viro , Josef Bacik , David Sterba , linux-btrfs@vger.kernel.org, Linux Kernel References: <20161011144507.okg6baqvodn2m2lh@codemonkey.org.uk> <20161012134717.n74tww5eywc7dqp7@codemonkey.org.uk> <20161012144012.7vvfehceoykswmun@codemonkey.org.uk> <20161013181622.qpi5puv6ivxvslnf@codemonkey.org.uk> <7b476728-75f8-e3d3-1261-b9b0d598ed10@fb.com> <20161016004240.hpstul32lb2f3u4g@codemonkey.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Content-Disposition: inline In-Reply-To: <20161016004240.hpstul32lb2f3u4g@codemonkey.org.uk> User-Agent: Mutt/1.5.24 (2015-08-30) X-Originating-IP: [2620:10d:c091:180::3b56] X-ClientProxiedBy: YQBPR01CA0056.CANPRD01.PROD.OUTLOOK.COM (10.169.139.24) To MWHPR15MB1245.namprd15.prod.outlook.com (10.175.3.7) X-MS-Office365-Filtering-Correlation-Id: be339bcf-6644-4d76-c54a-08d3f6f31740 X-Microsoft-Exchange-Diagnostics: 1;MWHPR15MB1245;2:2ljDhwH/lPRbPD8CsWCAz6xsd6RM0BnwlUzj7oDrSJbZm68mI+MrfE1NdBI5d8AQdEEQisqw9fIwa7relyBqwBvkI4cswvRHZsioWppyX6g4+f7oZOZlYf+JrxcuyerCAHpur4NOZBssiFix0E0w7pkL1MVwwxQmgRGhIB+ZUPgIGpkISnvSvMFWC6E1r2IfRi90UeRdLM5X0+niemPVtw==;3:aFxY/7JMrub9e87ImnLwut5ounsjx8qSkf7v7Wimww/7zJJnyej1/3buHCafCrlFxIR1rIu99S/eYgBjaGIOAWlEhUCu//GwS4rYwfXorwFiqeohGpo+mqSNUstx5ES7JTmgyRIxyfLZWwtEp1dWDQ== X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:MWHPR15MB1245; 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Uuughhhh. We're going to need a fast enough test > > > > that we can bisect. > > > > > > Progress... > > > I've found that this combination of syscalls.. > > > > > > ./trinity -C64 -q -l off -a64 --enable-fds=testfile -c fsync -c fsetxattr -c lremovexattr -c pwritev2 > > > > > > hits one of these two bugs in a few minutes runtime. > > > > > > Just the xattr syscalls + fsync isn't enough, neither is just pwrite + fsync. > > > Mix them together though, and something goes awry. > > > > > Hasn't triggered here yet. I'll leave it running though. > >The hits keep coming.. > >BUG: Bad page state in process kworker/u8:12 pfn:4988fa >page:ffffea0012623e80 count:0 mapcount:0 mapping:ffff8804450456e0 index:0x9 Hmpf, I've had this running since Friday without failing. Can you send me your .config please? -chris