Creating an EXT4 here.
>"File systems with an inode size of 128 bytes do not support timestamps beyond January 19, 2038. Inodes which are 256 bytes or larger will support extended timestamps, project id’s, and the ability to store some extended attributes in the inode table for improved performance" t. mke2fs man page
What is this "improved performance" about? I don't care about the year 2038 bug nor extended attributes.