Linux 4.0.6 breaks my disk/lvm/filesystem setup

[Christian Hesse]

Hello everybody,

with Linux 4.0.5 everything was perfectly fine, Linux 4.0.6 breaks the setup
on one of my systems: Only three of my logical volumes are available, systemd
reports:

lvm2-pvscan@254:3.service: State 'stop-sigterm' timed out. Killing.

Followed by a lot of failed dependencies. The setup looks like this:

NAME                MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
sda                   8:0    0 953,9G  0 disk  
|-sda1                8:1    0     1M  0 part  
|-sda2                8:2    0   256M  0 part  /boot/efi
|-sda3                8:3    0   7,8G  0 part  
| |-vg-iso          254:0    0     4G  0 lvm   /srv/iso
| |-vg-persist      254:1    0     2G  0 lvm   /srv/iso/persist
| `-vg-boot         254:2    0   128M  0 lvm   /boot
|-sda4                8:4    0 913,9G  0 part  
| `-cvg             254:3    0 913,9G  0 crypt 
|   |-cvg-swap      254:4    0     4G  0 lvm   [SWAP]
|   |-cvg-root      254:5    0    40G  0 lvm   /
|   |-cvg-log       254:6    0     1G  0 lvm   /var/log
|   |-cvg-home      254:7    0   500G  0 lvm   /home
|   |-cvg-vbox_win7 254:8    0    32G  0 lvm   
|   |-cvg-vbox_win8 254:9    0    32G  0 lvm   
|   |-cvg-git       254:10   0    12G  0 lvm   /srv/git
|   `-cvg-chroots   254:11   0    16G  0 lvm   /var/lib/archbuild
`-sda5                8:5    0    32G  0 part

Another system is just fine, the only difference is a logical volume with
btrfs (cvg-chroots). Possibly the btrfs fixes are involved?
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