On 10/11/2024 at 02:43, Felix Miata wrote:
Last week I was under a misunderstanding that upgrading EXT2 filesystems to EXT4 would be a satisfactory solution to eventual 64 bit timestamp support necessity,
Upgrade of existing filesystems is outside of partman scope.
Simply switching to EXT4 for /boot/ won't go far enough. Small sizes of those EXT4s suited to /boot/ use by default feature 128 byte inodes. Formatting those may require explicit use of '-I 256', and/or a change to mke2fs.conf to prevent small EXT4s from misfeaturing 128 byte inodes.
AFAICS /etc/mke2fs.conf already has "inode_size = 256" even for small filesystems (except for hurd) in bookworm.