lz4 not being used.

[SSalekin]

If I run dmesg | grep -i zswap, it says lzo is being used for compression.

[    0.724002] zswap: loaded using pool lzo/zbud

However, sudo systemd-swap status says it's using lz4

Zswap:
.  compressor        lz4
.  enabled           Y
.  max_pool_percent  80
.  zpool             z3fold
.  .  duplicate_entry        0
.  .  pool_limit_hit         0
.  .  pool_total_size        0
.  .  reject_alloc_fail      0
.  .  reject_compress_poor   0
.  .  reject_kmemcache_fail  0
.  .  reject_reclaim_fail    0
.  .  stored_pages           0
.  .  written_back_pages     0
.  .  compress_ratio         0%
SwapFC:
.        NAME                            TYPE  SIZE  USED  PRIO
.        /var/lib/systemd-swap/swapfc/1  file  512M  0B    -1
SwapD:
.       NAME  TYPE  SIZE  USED  PRIO

Is lz4 being used actually?

PS: I have lz4,lz4_compression added in /etc/initramfs-tools/modules

cat /etc/initramfs-tools/modules

# List of modules that you want to include in your initramfs.
# They will be loaded at boot time in the order below.
#
# Syntax:  module_name [args ...]
#
# You must run update-initramfs(8) to effect this change.
#
# Examples:
#
# raid1
# sd_mod
lz4
lz4_compress

[nefelim4ag]

i.e. yes, zswap use lz4, if systemd-swap show lz4 (values readed the same way, like below)

➜  ~ grep -R . /sys/module/zswap/parameters              
/sys/module/zswap/parameters/enabled:Y
/sys/module/zswap/parameters/max_pool_percent:25
/sys/module/zswap/parameters/zpool:z3fold
/sys/module/zswap/parameters/compressor:lz4