The development of the Linux kernel continues to advance and, like every cycle, It is now available la release candidate 6.16-rc4This release arrives approximately one month ahead of the planned stable release of Linux 6.16, and brings significant new features to both the file system and hardware support, especially for AMD GPU users.
Among the main additions of this version highlights the integration of the latest batch of changes for Bcachefs, the copy-on-write file system that remains classified as experimental. These changes, which include new fixes and the journal_rewind feature to facilitate disaster recovery, were surrounded by some controversy among developers, including Linus Torvalds himself. Despite the debate, the code was eventually merged into the kernel, although the future of Bcachefs remains uncertain and it could be removed from the kernel in the next 6.17 release cycle. Torvalds has stated that he prefers to distance himself from the issue due to the disagreement regarding the bug review process, which leaves the longevity of this file system in the medium term up in the air.
Linux 6.16-rc4 continues at a steady pace
In addition to the changes in Bcachefs, Linux 6.16-rc4 Incorporates improved support for AMD GFX9 and CDNA Instinct accelerator GPUs Using 'shader cleaner'. This feature aims to strengthen security between users and applications that share resources on systems with these graphics cards, expanding compatibility to more models in AMD's professional range.
Linus Torvalds commented that, although the merge window was long, the pace of changes for RCs remains stable. In his own words, the updates are roughly divided into thirds: a part dedicated to file systems (mainly Bcachefs, but also smb and btrfs); another third to drivers (with special mentions to the device mapper, which has been reverted due to performance issues); and the rest to miscellaneous variety, including documentation, fixes for architectures like loongarch and x86, updates to selftests, and other scattered improvements.
Those interested in trying out the new features can expect to find multiple minor changes and improvements. intended to increase stability and polish details in preparation for the imminent final release. You are encouraged to the community to continue testing and reporting any issues with new Bcachefs features and security improvements for AMD GPUs.
With the availability of this release candidate, the first half of 2025 is closing, introducing new features affecting both advanced file system support and compatibility and security on professional computers based on AMD hardware, in addition to multiple minor fixes throughout the core. The stable release is planned for the end of July, allowing users to prepare for a significant leap in functionality and reliability.