This bug was fixed in the package flashcache - 3.1.3+git20150701-5ubuntu0.17.04.1
--------------- flashcache (3.1.3+git20150701-5ubuntu0.17.04.1) zesty; urgency=medium * Initialize bi_op_flags in dm_io_request structures (LP: #1714185). -- Stefan Bader <[email protected]> Thu, 31 Aug 2017 10:17:56 +0200 ** Changed in: flashcache (Ubuntu Zesty) Status: Fix Committed => Fix Released -- You received this bug notification because you are a member of नेपाली भाषा समायोजकहरुको समूह, which is subscribed to Xenial. Matching subscriptions: Ubuntu 16.04 Bugs https://bugs.launchpad.net/bugs/1714185 Title: flashcache is not usable on kernel version 4.8 and later Status in flashcache package in Ubuntu: Fix Released Status in flashcache source package in Xenial: Fix Committed Status in flashcache source package in Zesty: Fix Released Status in flashcache package in Debian: New Bug description: 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 - 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/flashcache/+bug/1714185/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~group.of.nepali.translators Post to : [email protected] Unsubscribe : https://launchpad.net/~group.of.nepali.translators More help : https://help.launchpad.net/ListHelp
