From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9CED2C76186 for ; Wed, 17 Jul 2019 09:06:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8011D2077C for ; Wed, 17 Jul 2019 09:06:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729436AbfGQJGm (ORCPT ); Wed, 17 Jul 2019 05:06:42 -0400 Received: from smtp02.belwue.de ([129.143.71.87]:60345 "EHLO smtp02.belwue.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725932AbfGQJGm (ORCPT ); Wed, 17 Jul 2019 05:06:42 -0400 Received: from fex.rus.uni-stuttgart.de (fex.rus.uni-stuttgart.de [129.69.1.129]) by smtp02.belwue.de (Postfix) with SMTP id ECDE5872F for ; Wed, 17 Jul 2019 11:06:38 +0200 (MEST) Date: Wed, 17 Jul 2019 11:06:38 +0200 From: Ulli Horlacher To: "linux-btrfs@vger.kernel.org" Subject: Re: how do I know a subvolume is a snapshot? Message-ID: <20190717090638.GB3462@tik.uni-stuttgart.de> Mail-Followup-To: "linux-btrfs@vger.kernel.org" References: <20190716232456.GA26411@tik.uni-stuttgart.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Wed 2019-07-17 (08:57), misono.tomohiro@fujitsu.com wrote: > FYI, this problem should be fixed in mkfs.btrfs >= v4.16 since the top-level > subvolume also gets non-empty UUID at mkfs time. root@fex:~# lsb_release -d Description: Ubuntu 18.04.2 LTS root@fex:~# btrfs version btrfs-progs v4.15.1 *sigh* root@fex:~# uname -a Linux fex 4.15.0-54-generic #58-Ubuntu SMP Mon Jun 24 10:55:24 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux Can I use/install a newer mkfs.btrfs or do I also have to install a newer kernel version? -- Ullrich Horlacher Server und Virtualisierung Rechenzentrum TIK Universitaet Stuttgart E-Mail: horlacher@tik.uni-stuttgart.de Allmandring 30a Tel: ++49-711-68565868 70569 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/ REF: