[Bug 1654057] Re: btrfs balance crashed

[MichaelE]

Here is the snippet from kern.log

** Attachment added: "kern.log when btrfs balance crashed"
   https://bugs.launchpad.net/ubuntu/+source/btrfs-tools/+bug/1654057/+attachment/4800051/+files/kern.log.balance-crash

** Description changed:

- Converted a lvm partition from ext4 to btrfs, then deleted ext subvolume and started btrfs balance. Balance job crahsed after some time leaving the partion in ro status.
+ Converted a lvm partition from ext4 to btrfs, then deleted ext subvolume and started btrfs balance. Balance job crashed after some time leaving the partion in ro status.
  btrfs check on unmounted partition did not work.
  Could remount with -o recovery which also started balance job again.
  
- Can somebody tell me what cause the crash and whether any data got lost?
+ Can somebody tell me what caused the crash and whether any data got
+ lost?
  
  I'll attach the part of the kern.log as well.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: btrfs-tools 4.4-1
  ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30
  Uname: Linux 4.4.0-53-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.4
  Architecture: amd64
  Date: Wed Jan  4 20:40:30 2017
  ProcEnviron:
-  LANGUAGE=de_DE
-  TERM=xterm-256color
-  PATH=(custom, no user)
-  LANG=de_DE.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=de_DE
+  TERM=xterm-256color
+  PATH=(custom, no user)
+  LANG=de_DE.UTF-8
+  SHELL=/bin/bash
  SourcePackage: btrfs-tools
  UpgradeStatus: Upgraded to xenial on 2014-07-29 (890 days ago)

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https://bugs.launchpad.net/bugs/1654057

Title:
  btrfs balance crashed

Status in btrfs-tools package in Ubuntu:
  New

Bug description:
  Converted a lvm partition from ext4 to btrfs, then deleted ext subvolume and started btrfs balance. Balance job crashed after some time leaving the partion in ro status.
  btrfs check on unmounted partition did not work.
  Could remount with -o recovery which also started balance job again.

  Can somebody tell me what caused the crash and whether any data got
  lost?

  I'll attach the part of the kern.log as well.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: btrfs-tools 4.4-1
  ProcVersionSignature: Ubuntu 4.4.0-53.74-generic 4.4.30
  Uname: Linux 4.4.0-53-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.4
  Architecture: amd64
  Date: Wed Jan  4 20:40:30 2017
  ProcEnviron:
   LANGUAGE=de_DE
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  SourcePackage: btrfs-tools
  UpgradeStatus: Upgraded to xenial on 2014-07-29 (890 days ago)

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