Major bugfixes, Major feature enhancements, Stable
This release adds support for the new ARM 64-bit architecture, ARM multiplatform, which gives the ability to boot into different ARM systems using a single kernel, support for cryptographically signed kernel modules, Btrfs support for disabling copy-on-write on a per-file basis using chattr, faster Btrfs fsync(), a new experimental 'perf trace' tool modelled after strace, support for the TCP Fast Open feature on the server side, experimental SMBv2 protocol support, stable NFS 4.1 and parallel NFS, and a vxlan tunnelling protocol that allows transfer of Layer 2 Ethernet packets over UDP.
3.2, Major bugfixes, Major feature enhancements, Stable
This release includes support for ext4 block sizes bigger than 4KB and up to 1MB, which improve performance with big files. btrfs has been updated with faster scrubbing, automatic backup of critical filesystem metadata, and tools for manual inspection of the filesystems. The process scheduler has support to set upper limits of CPU time. The desktop responsiveness in the presence of heavy writes has been improved. TCP has been updated to include an algorithm that speeds up the recovery.