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3. File systems
EXT4
Create nojournal_checksum mount option to disable journal checksumming (because the metadata_csum feature turns it on by default now) commit
Prevent online resize while using backup superblock commit
F2FS
Introduce "fastboot" mount option for reducing mount time as much as possible, even though normal performance can be sacrificed commit
Support storing directory entries inside inode page, can be enabled with "inline_dentry" mount option commit, commit, commit, commit
Add "dirsync" to allow sync operation on directory operations commit
AFFS
Add support to O_DIRECT commit
Squashfs
Add LZ4 compression support commit
CEPH
Support inline data feature commit