I've staged another fix, Laurence is seeing success with this added: https://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=dm-4.8&id=d50a6450104c237db1dc75314d17b78c990a8c05 I'll be sending all the fixes I've queued to Linus tonight or early tomorrow (since I'll then be on vacation until Monday 8/15).