Seems like this particular issue has been reported here: http://www.spinics.net/lists/linux-btrfs/msg43084.html
and fixed with upstream fix: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3d84be799194147e04c0e3129ed44a948773b80a which explains why 4.1-rc2 fixes this issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1413008 Title: Kernel BUG shortly after mounting btrfs filesystem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1413008/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs