The famfs filesystem, which is meant to provide shared access to huge memory-resident files on CXL and other
devices, returned to
the Linux Storage,
Filesystem, Memory Management, and BPF Summit (LSFMM+BPF) in 2026.
It was first discussed at LSFMM+BPF 2024 and a new implementation was described at the 2025
gathering, but it still has not made its way into the kernel; LWN looked
at a discussion about merging famfs back in April 2026.
https://lwn.net/Articles/1082687/
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