It was nearly one year ago in the Linux 6.13 kernel that [1]the ReiserFS file-system was dropped from the mainline kernel after having been deprecated in 2022. That dropped 32.8k lines of code from the Linux kernel but some documentation remnants of ReiserFS were mistakenly left in but now in the process of dropping those remnants for the defunct file-system.

David Sterba of SUSE sent out the patch today after spotting some ReiserFS remnants within the Linux kernel documentation as well as some tooling. ReiserFS mentions are being removed from the Linux kernel documentation for no longer being relevant. The exception though is around the ReiserFS R5 hash function that is still used by some code within the kernel.

[2]This patch on the Linux kernel mailing list continues clearing out those old ReiserFS references.

Meanwhile the out-of-tree [3]Reiser4 file-system code or the [4]Reiser5 evolution remain unmaintained and the [5]development repository hasn't been touched now in three years. So with the remaining documentation references being cleared out, it looks like this era of Linux file-system pursuit by convicted murderer Hans Reiser is now over for good.



[1] https://www.phoronix.com/news/ReiserFS-Deleted-Linux-6.13

[2] https://lore.kernel.org/lkml/20250813100053.1291961-1-dsterba@suse.com/

[3] https://www.phoronix.com/search/Reiser4

[4] https://www.phoronix.com/search/Reiser5

[5] https://github.com/edward6/reiser4