The Filesystem in
Userspace (FUSE) subsystem provides a way to service filesystem
requests from a user-space server, which moves the format-handling code out
of the kernel. The FUSE server can use the io_uring
facility for better performance, but Bernd Schubert is concerned that
memory is being wasted because the current implementation has a single,
large buffer size that is excessive for small I/O operations. He led a discussion on that topic
in the filesystem track of the 2026 Linux Storage,
Filesystem, Memory Management, and BPF Summit in Zagreb, Croatia.

https://lwn.net/Articles/1085618/
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