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[Launchpad Bug Tracker <1507658@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.2.0-92.131

---------------
linux (3.2.0-92.131) precise; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1507935

  [ Upstream Kernel Changes ]

  * jbd2: protect all log tail updates with j_checkpoint_mutex
    - LP: #1507658

 -- Luis Henriques <luis.henriques@xxxxxxxxxxxxx>  Tue, 20 Oct 2015
16:50:34 +0100

** Changed in: linux (Ubuntu Precise)
       Status: Fix Committed => Fix Released

** Changed in: linux (Ubuntu Precise)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1507658

Title:
  [3.2.0-91-generic] kernel BUG at /build/linux-
  _q8eS2/linux-3.2.0/fs/jbd2/journal.c:832!

Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Precise:
  Fix Released

Bug description:
  Since kernel 3.2.0-91 update in Ubuntu server 12.04 LTS, 5 of our
  servers have encountered a serious problem and needed to be rebooted
  after making random I/O operations (LVM, resize2fs, etc...).

  All servers that were impacted reported this error in dmesg : kernel
  BUG at /build/linux-_q8eS2/linux-3.2.0/fs/jbd2/journal.c:832!

  This seems to be related to this discussion :
  http://permalink.gmane.org/gmane.linux.kernel.stable/151231

  break-fix: - 24bcc89c7e7c64982e6192b4952a0a92379fc341
  break-fix: - a78bb11d7acd525623c6a0c2ff4e213d527573fa
  break-fix: - 79feb521a44705262d15cc819a4117a447b11ea7

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