Hi, Tomohiro Kusumi is currently working on HAMMER2 implementation for OpenBSD, FreeBSD and NetBSD.
The repository is here: https://github.com/kusumi/openbsd_hammer2 He maintains repositories for NetBSD, FreeBSD and OpenBSD, which suggests that the implementation is portable. He also provides a patch for OpenBSD 7.3: https://github.com/kusumi/openbsd_hammer2/blob/master/patch/openbsd73.patch The patch looks very minimal to me, with no deeper changes to the kernel. I haven't found any discussion about HAMMER2 in list archives, so I'd like to bring it to devs attention, kindly asking for your opinion. Does it look like it's worth bringing in? Does it require more work? I'd appreciate any opinions from more knowledgable crowd. Cheers, Chris