Kernel Log: Coming in 2.6.39 (Part 2) � Storage and file systems by Thorsten Leemhuis Various internal changes to the block layer that were specifically mentioned by Linus Torvalds are designed to enhance performance and scalability. The Ext4 file system is also said to offer improvements in this respect. Still classified as experimental, Btrfs now offers Batched Discard functionality, and LIO (