[Users] SSD trim support over a LUKS layer

[Narcis Garcia]

Does anybody know how can I solve this?

$ lsb_release -d
Description:    Devuan GNU/Linux 1.0 (jessie)

$ uname -a
Linux bell1 2.6.32-openvz-042stab134.8-amd64 #1 SMP Fri Dec 7 17:18:40
MSK 2018 x86_64 GNU/Linux

$ lsblk --discard /dev/sda
NAME           DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO
sda                   0      512B       2G         0
├─sda1                0      512B       2G         0
└─sda2                0      512B       2G         0
  └─sda2_crypt        0        0B       0B         0

$ cat /etc/crypttab
sda2_crypt UUID=***** none luks,discard

$ mount | grep -e discard
/dev/mapper/sda2_crypt on / type ext4
(rw,noatime,errors=remount-ro,barrier=1,data=ordered,discard)
/dev/sda1 on /boot type ext4 (rw,relatime,barrier=1,data=ordered,discard)

$ sudo fstrim /
fstrim: /: the discard operation is not supported

Thank you.