not working data compression

[brikler]

hi,

in short: i am using f2fs since 2012 on my desktop linux, and i am also a wannabe compression user but it doesn't work (surprise surprise).

i found this messages in my journal, for zstd, lzo, and lz4:

#zstd
[  136.008011] cachyos kernel: F2FS-fs (nvme0n1p1): Image doesn't support compression
#lzo
[  152.691007] cachyos kernel: F2FS-fs (nvme0n1p1): Image doesn't support compression
#lz4
[  158.719668] cachyos kernel: F2FS-fs (nvme0n1p1): Image doesn't support compression

it seems something is missing, but what?
there are some threads about not working compression, but without a solution.

i am using kernel: 6.15.2-2-cachyos (cachyos is a archlinux clone) and f2fs-tools 1.16.0-3.1

loaded f2fs related modules are:

lsmod | grep f2fs
f2fs                 1105920  1
lz4hc_compress         20480  1 f2fs
lz4_compress           24576  1 f2fs

the f2fs related kernel settings::

CONFIG_F2FS_FS=m
CONFIG_F2FS_STAT_FS=y
CONFIG_F2FS_FS_XATTR=y
CONFIG_F2FS_FS_POSIX_ACL=y
CONFIG_F2FS_FS_SECURITY=y
CONFIG_F2FS_CHECK_FS=y
# CONFIG_F2FS_FAULT_INJECTION is not set
CONFIG_F2FS_FS_COMPRESSION=y
CONFIG_F2FS_FS_LZO=y
CONFIG_F2FS_FS_LZORLE=y
CONFIG_F2FS_FS_LZ4=y
CONFIG_F2FS_FS_LZ4HC=y
CONFIG_F2FS_FS_ZSTD=y
CONFIG_F2FS_IOSTAT=y
CONFIG_F2FS_UNFAIR_RWSEM=y

source: https://gitlab.archlinux.org/archlinux/packaging/packages/linux/-/blob/6.15.2.arch1-1/config

can i provide more useful information?
maybe you can me point in the right direction :)ilsystem

edit: the compression feature must be setup with the filsystem cration
mkfs.f2fs -l mylabel -O extra_attr,inode_checksum,sb_checksum,compression /dev/<>

many thanks for advance
sincerely tom

ps
hopefully your crystallball is well polished^