Hello Stefan, or anyone else affected,

Accepted flashcache into zesty-proposed. The package will build now and
be available at
https://launchpad.net/ubuntu/+source/flashcache/3.1.3+git20150701-5ubuntu0.17.04.1
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-zesty to verification-done-zesty. If it does not fix
the bug for you, please add a comment stating that, and change the tag
to verification-failed-zesty. In either case, details of your testing
will help us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Description changed:

  SRU justification:
  
  Impact:
  The flashcache DKMS module is building but due to an incomplete adaptation 
for the bi_op/bi_opf split the resulting device-mapper logical volume is not 
properly writing back data to the backing device.
  !!! It is possible to write to the volume but the data is LOST !!!
  
  Fix:
  When setting up internal device-mapper IO structures we *must* also 
initialize bi_op_flags. At least when the structure is on the stack and is set 
up with individual assignments. Maybe it would not be required for the { ... } 
form but better be explicit in all cases.
  
  Testcase:
  - prereq: two block devices (disks or partitions), for testing this can also
-   be loop devices. also need flashcache-utils and flashcache-dkms
+   be loop devices. also need flashcache-utils and flashcache-dkms
  - run "sudo flashcache-create -p back <name> <cache-dev> <backing-dev>"
  - run "sudo mkfs.ext4 /dev/mapper/<name>"
  - run "sudo fsck -f /dev/mapper/<name>"
  - run "sudo dmsetup remove <name>" (this can take a bit)
  - run "sudo fsck -f <backing-dev>"
+ 
+ Regression Potential:
+ None. The fix is only properly initializing otherwise uninitialized struct 
fields.

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https://bugs.launchpad.net/bugs/1714185

Title:
  flashcache is not usable on kernel version 4.8 and later

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