From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f175.google.com ([209.85.223.175]:35555 "EHLO mail-io0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932842AbdHVOM2 (ORCPT ); Tue, 22 Aug 2017 10:12:28 -0400 Received: by mail-io0-f175.google.com with SMTP id 1so27305935ioy.2 for ; Tue, 22 Aug 2017 07:12:28 -0700 (PDT) Received: from [191.9.206.254] (rrcs-70-62-41-24.central.biz.rr.com. [70.62.41.24]) by smtp.gmail.com with ESMTPSA id z139sm5181639itb.41.2017.08.22.07.12.26 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 22 Aug 2017 07:12:26 -0700 (PDT) Subject: Re: finding root filesystem of a subvolume? To: linux-btrfs@vger.kernel.org References: <20170822122350.GA14804@rus.uni-stuttgart.de> <20170822124036.GA32302@carfax.org.uk> <20170822125030.GB14804@rus.uni-stuttgart.de> <16778020-9167-b7cc-4768-ee33dca2bbb7@gmail.com> <20170822133030.GE14804@rus.uni-stuttgart.de> <0c35fba9-a514-31dd-a703-17f4727ed229@gmail.com> <20170822135301.GF14804@rus.uni-stuttgart.de> From: "Austin S. Hemmelgarn" Message-ID: Date: Tue, 22 Aug 2017 10:12:25 -0400 MIME-Version: 1.0 In-Reply-To: <20170822135301.GF14804@rus.uni-stuttgart.de> Content-Type: text/plain; charset=utf-8; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 2017-08-22 09:53, Ulli Horlacher wrote: > On Tue 2017-08-22 (09:37), Austin S. Hemmelgarn wrote: > >>> root@fex:~# df -T /local/.backup/home >>> Filesystem Type 1K-blocks Used Available Use% Mounted on >>> - - 1073740800 104252160 967766336 10% /local/.backup/home >> >> Hmm, now I'm really confused, I just checked on the Ubuntu 17.04 and >> 16.04.3 VM's I have (I only run current and the most recent LTS >> version), and neither of them behave like this. > > I have this kind of output on all of my Ubuntu hosts: > > root@moep:~# grep PRETTY_NAME /etc/os-release > PRETTY_NAME="Ubuntu 16.04.3 LTS" > > root@moep:~# df -T /usb/UF/tmp/blubb > Filesystem Type 1K-blocks Used Available Use% Mounted on > - - 12581888 3690524 7253700 34% /usb/UF/tmp/blubb > > root@moep:~# btrfs subvolume show /usb/UF/tmp/blubb > /usb/UF/tmp/blubb > Name: blubb > UUID: ecf8c804-d4a3-9948-89fe-b0c1971c25cb > Parent UUID: - > Received UUID: - > Creation time: 2017-08-22 12:54:16 +0200 > Subvolume ID: 262 > Generation: 23 > Gen at creation: 22 > Parent ID: 5 > Top level ID: 5 > Flags: - > Snapshot(s): > > root@moep:~# dpkg -l | grep btrfs > ii btrfs-tools 4.4-1ubuntu1 amd64 Checksumming Copy on Write Filesystem utilities > Hmm, interesting. Are you using qgroups by chance?