BCacheFS, a filesystem that has had a tumultuous journey within the Linux community, is now officially a DKMS (Dynamic Kernel Module Support) module, following its removal from the Linux kernel. This decision came after a series of heated debates on the Linux Kernel mailing list, where its lead developer, Kent Overstreet, had contentious exchanges with Linus Torvalds, the Linux kernel’s primary maintainer.
The conflicts stemmed from Overstreet’s insistence on introducing new features into the kernel’s release candidates without adhering to established protocols, resulting in concerns over data integrity and filesystem stability. These issues were so significant that they provoked wide-scale discussions among kernel developers, and ultimately led to BCacheFS being sidelined.
Distributions like SuSE indicated that they would disable BCacheFS starting from kernel version 6.17, which means users reliant on this filesystem would have to manually install the new DKMS module themselves. On the other hand, other distributions like Arch Linux may include it by default in their setups, so users should check their distribution’s policies regarding BCacheFS.
The developer community’s reaction has been mixed, reflecting on the implications of removing BCacheFS. Some view it as a necessary decision for ensuring kernel stability, while others express disappointment over losing a filesystem they consider promising.
For more background, you can view the discussion here, and a detailed explanation of the recent changes can be found in this video.
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