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[Bug 1509237] Missing required logs.


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

apport-collect 1509237

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

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  dm-cache: clean cache resyncs to origin on every boot

Status in linux package in Ubuntu:

Bug description:
  On every boot an entire dm-cache resyncs to an origin device, even if
  it was clean before on shutdown. It takes time and full bandwidth of
  an origin device. There is the simple solution from the upstream:

  commit 7e0a9739fd9e72dc51490bdff92796400b12a34f
  Author: Joe Thornber <ejt redhat com>
  Date:   Thu Oct 22 18:10:55 2015 +0100

      [dm-cache] The CLEAN_SHUTDOWN flag was not being set
      or rather, it was being set on the disk, then immediately cleared again.
      If the CLEAN_SHUTDOWN flag is not set when a cache is loaded then all cache
      blocks are marked as dirty and a full writeback occurs.

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