Th package kernel-defaults-base does not include some kernel modules that are
needed for some basic operations like creating a podmain container checkpoint:

$ podman container checkpoint distracted_babbage
ERRO[0000] container still running                      
ERRO[0000] criu failed: type NOTIFY errno 0
log file:
/var/lib/containers/storage/btrfs-containers/ee203bab8fadb391481ec3179657eccd3970e3f9acc087ab8869890cd7938239/userdata/dump.log 
Error: `/usr/bin/runc checkpoint --image-path
/var/lib/containers/storage/btrfs-containers/ee203bab8fadb391481ec3179657eccd3970e3f9acc087ab8869890cd7938239/userdata/checkpoint
--work-path
/var/lib/containers/storage/btrfs-containers/ee203bab8fadb391481ec3179657eccd3970e3f9acc087ab8869890cd7938239/userdata
ee203bab8fadb391481ec3179657eccd3970e3f9acc087ab8869890cd7938239` failed: exit
status 1

This was detected in the context of ALP, see
https://bugzilla.suse.com/show_bug.cgi?id=1203854. Right now we have two images
for ALP (non-encrypted and encrypted). The non-encrypted one includes
kernel-defaults-base, and the encrypted one uses kernel-defaults. With the
encrypted image criu does not complain when creating a podman container
checkpoint.

These *diag modules are missing with kernel-defaults-base: raw_diag, tcp_diag,
udp_diag, unix_diag.

This issue is relevant even for TW in virtual environments (where you don���������t
need all drivers). Probably we will need to fix the packaging of kernel to
include those missing modules with kernel-defaults-base.