From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leen Besselink Subject: df output wrong ? Date: Mon, 05 Sep 2011 11:50:43 +0200 Message-ID: <4E649B73.6060802@consolejunkie.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 To: linux-btrfs@vger.kernel.org Return-path: List-ID: Hi, Just noticed something about df -h output I didn't expect. I'm sorry if this has already been answered or is a know problem. Just see the test-part below to see what I did. ____ setup ____ - installed Fedora 16 Alpha on a KVM-VM with one 8GB HD-image. - did a yum update ( - got a kernel update, which broke grub setup, worked around it: kernel I use is: 3.0.0-1.fc16.x86_64) - installed btrfs-progs - created a directory /test - created 2 files with dd from /dev/zero with the size of 2GB in /test - created 2 loopback devices of the files - created a btrfs filesystem with RAID 1 data and RAID1 meta-data - created directory /test/mnt ____ test _____ - mounted the btrfs filesystem on /test/mnt - created a file of 256MB with dd from /dev/zero in /test/mnt - created a snapshot of /test/mnt in /test/mnt/snap1 - deleted 256MB file in /test/mnt - deleted snapshot /test/mnt/snap1 - checked df -h, 256MB wasn't released. The filesystem does not look empty - unmounted /test/mnt - mounted /test/mnt - checked df -h, 256MB was released. The filesystem does look empty Hope this is helpful. Have a nice day, Leen.