| # V5 features that were the mkfs defaults when the upstream Linux 5.15 LTS | |
| # kernel was released at the end of 2021. | |
| [metadata] | |
| bigtime=1 | |
| crc=1 | |
| finobt=1 | |
| inobtcount=1 | |
| metadir=0 | |
| reflink=1 | |
| rmapbt=0 | |
| autofsck=0 | |
| [inode] | |
| sparse=1 | |
| nrext64=0 | |
| exchange=0 | |
| [naming] | |
| parent=0 |