The Rust programming language
has long aimed to be a suitable replacement for C in operating-system
kernel development.  As Rust has matured, many developers have expressed
growing interest in using it in the Linux kernel. At the 2020 (virtual) Linux Plumbers Conference, the
LLVM microconference track hosted a session
on open questions about and
obstacles to accepting Rust upstream in the Linux kernel.  The interest in
this topic can be seen in the fact that this was the single most heavily
attended session at the 2020 event.