Hello Stephen Please add the zuf tree below to the linux-next tree. [https://github.com/NetApp/zufs-zuf zuf] zuf is a part of a bigger project ZUFS, which has a Kernel part and a user-mode daemon part. The last mailing-list submission was here: https://lore.kernel.org/linux-fsdevel/20190926020725.19601-1-boazh@xxxxxxxxxx zuf is a zero risk code drop into a new fs/zuf/ directory. The only friction part is an easy merge fs/Makefile, fs/Kconfig && MAINTAINERS Here is a short summery from the cover letter: ZUFS - stands for Zero-copy User-mode FS It enables a full implementation of a VFS filesystem. But mainly it is a very new way to communicate with user-mode servers. * With performance and scalability never seen before. (<4us latency) Why? the core communication with user-mode is completely lock-less, per-cpu locality, NUMA aware. * True zero copy end to end of both data and meta data. * Synchronous operations (for low latency) * Numa awareness * Multy device support * pmem and DAX support The Kernel code can be found at: https://github.com/NetApp/zufs-zuf zuf Project History: It has started somewhere in 1st Q 2017. And had a few incarnations. I have presented this project in all LSF(s) and a few Plumbers since then. It is already released to Netapp costumers and is heavily tested daily. It is very stable as well as capable and preforment. I expect some more reviews and one more version posting before I will find it ready for upstream. But I would love if it can sit in linux-next and make sure there are no surprises and properly compiles under all configurations/ARCHs it should compile under. And that it is really zero risk for the rest of the Kernel. The above *zuf* branch is currently based on v5.4-rc4. And cleanly merges over last-night's linux next tree. I will keep it up to follow latest state. I might rebase it a few more times to merge in fixes and add more documentation. Thank you Boaz
