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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1406867

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

** Tags added: trusty

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https://bugs.launchpad.net/bugs/1406867

Title:
  Hyper-V TRIM Feature Broken in current LTS trusty kernel

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  The TRIM/UNMAP feature is broken in the current trusty kernel with
  Hyper-V because of the reversion of this commit:

  http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-
  trusty.git;a=commit;h=81a73bce0c7b86fbf51004cb171387e73e082784

  However a proposed storvsc patch has been submitted to the upstream
  kernel mailing list which could be found here:

  https://patchwork.kernel.org/patch/5503381/

  In Hyper-V TRIM/UNMAP allows the user to reclaim allocated storage
  that is no longer in use inside a thin provisioned VHDX volume.

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