From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934242AbcHJSW0 (ORCPT ); Wed, 10 Aug 2016 14:22:26 -0400 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:16365 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932480AbcHJSWU (ORCPT ); Wed, 10 Aug 2016 14:22:20 -0400 Subject: Re: [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} still in use (1) [unmount of btrfs vda] To: Linus Torvalds , kernel test robot , Al Viro , Chris Mason , David Sterba References: <20160810053947.GG21941@yexl-desktop> CC: "J. Bruce Fields" , LKML , LKP , linux-btrfs , Linux NFS Mailing List From: Josef Bacik Message-ID: Date: Wed, 10 Aug 2016 14:22:07 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [107.15.72.49] X-ClientProxiedBy: DM2PR0501CA0031.namprd05.prod.outlook.com (10.162.29.169) To DM5PR15MB1321.namprd15.prod.outlook.com (10.173.210.11) X-MS-Office365-Filtering-Correlation-Id: 838ab4c0-b9c3-4805-677a-08d3c14b3eb8 X-Microsoft-Exchange-Diagnostics: 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1;DM5PR15MB1321;20:hppNda1G9h6sJnG3nolD0nKLS3CMyW6lYVuIAR5HT3xOeExQHY/agfrkg2FiaBnfYvG84iIddYDoX+gL1/TEj2KX7d4W98OJo8hwwRhZ14psFR1GfcAUbcPdzxxfWSaB8NlpN+RsLGj4+f2E34lH+00bEbvYHp9RHZoJCkXHXiQ= X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Aug 2016 18:22:10.1106 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR15MB1321 X-OriginatorOrg: fb.com X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-08-10_14:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/10/2016 02:06 PM, Linus Torvalds wrote: > On Tue, Aug 9, 2016 at 10:39 PM, kernel test robot > wrote: >> >> [ 1537.558739] nfsd: last server has exited, flushing export cache >> [ 1540.627795] BUG: Dentry ffff880027d7c540{i=1846f,n=0a} still in use (1) [unmount of btrfs vda] >> [ 1540.633915] ------------[ cut here ]------------ >> [ 1540.636551] WARNING: CPU: 0 PID: 20552 at fs/dcache.c:1474 umount_check+0x72/0x80 > > Hmm. Adding Al and the btrfs people to the cc, and expanding the nfs > list. Unlike the flakey-IO warning, this one sounds like a real issue. > Whether it's some dentry leak by nfsd or a VFS or btrfs issue, I can't > begin to guess. Al, ideas? > > More information in the original email on lkml. > I'm not subscribed to lkml and for some reason I can't find the original email in any of the lkml/linux-nfs archives. Could you forward more of the details? Thanks, Josef