FamFS Hopes To Go Upstream In 2026
The FamFS file-system being developed by Micron hopes to go upstream for Linux in "early-ish 2026".
For around two years already Micron has been working on FamFS as a new file-system that is special purpose and designed for fabric-attached memory (FAM) needs such as with CXL servers. FamFS over the past year was ported to FUSE for largely operating in user-space but some kernel changes remain.
John Groves of Micron who also serves on the CXL Software & Systems working group presented on FamFS at Linux Plumbers Conference this week in Tokyo, Japan.
The current hope is that FamFS will be able to go upstream in "early-ish 2026" and that as of Linux 6.18 the FamFS patches are now fully working with other kernel changes made.
Again, the focus is just on fabric-attached memory with FamFS not aiming to be any general purpose file-system or the like.
Some feature/roadmap plans for FamFS include interleaved file support, proper software-based cache coherency, pNFS integration, and other improvements.
Those wishing to learn more about FamFS can do so via the PDF slide deck from LPC2025.
For around two years already Micron has been working on FamFS as a new file-system that is special purpose and designed for fabric-attached memory (FAM) needs such as with CXL servers. FamFS over the past year was ported to FUSE for largely operating in user-space but some kernel changes remain.
John Groves of Micron who also serves on the CXL Software & Systems working group presented on FamFS at Linux Plumbers Conference this week in Tokyo, Japan.
The current hope is that FamFS will be able to go upstream in "early-ish 2026" and that as of Linux 6.18 the FamFS patches are now fully working with other kernel changes made.
Again, the focus is just on fabric-attached memory with FamFS not aiming to be any general purpose file-system or the like.
Some feature/roadmap plans for FamFS include interleaved file support, proper software-based cache coherency, pNFS integration, and other improvements.
Those wishing to learn more about FamFS can do so via the PDF slide deck from LPC2025.