Kernel Log: Linux 2.6.30 is taking shape
Between Tuesday and Wednesday, Linus Torvalds released Linux 2.6.30-rc1, the first release candidate of version 2.6.30 of the Linux kernel. The final version is expected in eight to ten weeks. Fifteen days after the release of Linux 2.6.29, the first RC of 2.6.30 closes the merge window, the first phase of the development cycle in which the kernel hackers integrate all the major changes into the main development branch; the coming few weeks will be dedicated to eliminating any flaws the testers find in the release candidates.
Statistically, the programmers modified 8344 source code files; 980,137 lines were added or moved, and 372,613 lines were deleted. In his release email, Linus Torvalds points out that a third of the changes are "crap", as they affect the staging area, which is primarily intended for immature drivers and isn't popular with everyone. He said a further third of the changes are "real" drivers, and the final third affects other kernel areas.
What's (not) new
After two new file systems, Btrfs and SquashFS, already made it into the main development branch with Linux 2.6.29, version 2.6.30 will include a further two new file systems: NILFS2 (New Implementation of a Log-structured File System version 2) and exofs (Extended Object File System; previously known as osdfs). NILFS2 is a log-structured file system (LFS) that offers "continuous snapshotting", a technology specially optimised for Solid State Drives (SSD) without wear levelling; exofs, on the other hand, is intended for the somewhat exotic OSDs (Object-Based Storage Devices) (see also: kernel documentation for NILFS2 and exofs). Desktop users are, therefore, unlikely to have much contact with either of these file systems.
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