Return-Path: linux-nfs-owner@vger.kernel.org Received: from mail-oa0-f44.google.com ([209.85.219.44]:65229 "EHLO mail-oa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750969AbaEWCOs (ORCPT ); Thu, 22 May 2014 22:14:48 -0400 Received: by mail-oa0-f44.google.com with SMTP id o6so4946368oag.3 for ; Thu, 22 May 2014 19:14:48 -0700 (PDT) Message-ID: <537EAF05.2020900@gmail.com> Date: Fri, 23 May 2014 10:14:29 +0800 From: Kinglong Mee MIME-Version: 1.0 To: Trond Myklebust CC: linux-nfs@vger.kernel.org, kinglongmee@gmail.com Subject: Get "device is busy" when umounting nfsv4 file Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-nfs-owner@vger.kernel.org List-ID: When using NFSv4 on Fedora 20 with latest kernel (3.15.0-rc6+), I can't umount the mountpoint after only an 'ls' operation. [root@localhost ~]# cat /etc/exports /nfstest *(rw,no_root_squash,no_subtree_check,insecure) [root@localhost ~]# mount -t nfs 127.0.0.1:/ /mnt/ [root@localhost ~]# ls /mnt/ nfstest [root@localhost ~]# umount /mnt/ umount.nfs4: /mnt: device is busy