[Bugme-new] [Bug 20932] New: Can not resize btrfs partition

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Fri Oct 22 07:51:15 PDT 2010


https://bugzilla.kernel.org/show_bug.cgi?id=20932

           Summary: Can not resize btrfs partition
           Product: File System
           Version: 2.5
    Kernel Version: 2.6.35
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: btrfs
        AssignedTo: fs_btrfs at kernel-bugs.osdl.org
        ReportedBy: chris.std at web.de
        Regression: No


System: Ubuntu 10.10 64Bit Desktop with
Linux Kernel 2.6.35.22.23 (reported by apt)
btrfs-tools (debian package) version 0.19+20100601-3

parted -l returns (for /dev/sda ):
--------------------------------
Model: ATA OCZ-AGILITY2 (scsi)
Disk /dev/sda: 60,0GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type      File system  Flags
 4      32,3kB  98,7MB  98,7MB  primary   ext4         boot
 2      98,7MB  33,8GB  33,7GB  extended
 5      101MB   10,0GB  9921MB  logical   btrfs
 1      33,8GB  53,5GB  19,7GB  primary   ext4
---------------------------------
with /dev/sda4 mounted as /boot and /dev/sda5 mounted as /, I tried different
ways to resize my btrfs partition but without success:

christian at PC-2:~$ sudo btrfs filesystem resize max /
Resize '/' of 'max'
ERROR: unable to resize '/'
christian at PC-2:~$ sudo btrfs filesystem resize +2g /
Resize '/' of '+2g'
ERROR: unable to resize '/'
christian at PC-2:~$ sudo btrfs filesystem resize +2m /
Resize '/' of '+2m'
ERROR: unable to resize '/'
christian at PC-2:~$ sudo btrfs filesystem resize +2k /
Resize '/' of '+2k'
ERROR: unable to resize '/'
christian at PC-2:~$

reducing size does not throw any errors but does not seem to change anything:
christian at PC-2:~$ sudo btrfs filesystem resize -1g /
Resize '/' of '-1g'
christian at PC-2:~$

but even after reboot parted shows the same partition size as before
"resizing". The only strange thing is, "adding" this "removed" 1g of size once
does not throw an error:
christian at PC-2:~$ sudo btrfs filesystem resize -1g /
Resize '/' of '-1g'
christian at PC-2:~$ sudo btrfs filesystem resize +1g /
Resize '/' of '+1g'
christian at PC-2:~$ sudo btrfs filesystem resize +1g /
Resize '/' of '+1g'
ERROR: unable to resize '/'
christian at PC-2:~$ 

why doesn't
btrfs filesystem resize max /
resize the btrfs partition so no more free space is left in the extended
partition /dev/sda2 ?

Do you need more information to answer/solve this bug?

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