Hello everyone. My current setup (root on ZFS) looks like this:
% lsblk /dev/nvme1n1
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
nvme1n1 259:0 0 465.8G 0 disk
└─luks-c73611b6-5e9d-4272-9c56-ede008b1f9b6 254:0 0 465.7G 0 crypt
% zpool status zroot
pool: zroot
state: ONLINE
config:
NAME STATE READ WRITE CKSUM
zroot ONLINE 0 0 0
luks-c73611b6-5e9d-4272-9c56-ede008b1f9b6 ONLINE 0 0 0
I enabled TRIM for LUKS by adding rd.luks.allow-discards to Dracut’s kernel_cmdline. The output of the following command contains allow_discards, which should indicate that TRIM is indeed enabled, IIUC.
# dmsetup table /dev/mapper/luks-c736[...] --showkeys
My question is, should TRIM be enabled via ZFS as well?
# zpool set autotrim=on zroot