[$] Tracepoints for the VFS?

Adding tracepoints to some kernel subsystems has been controversial-ordisallowed-due to concerns about the user-spaceABI that they might create. The virtual filesystem (VFS) layer haslong been one of the subsystems that has not allowed any tracepoints, butthat may be changing. At the 2025 Linux Storage, Filesystem, MemoryManagement, and BPF Summit (LSFMM+BPF), Ted Ts'o led a discussion aboutwhether the ABI concerns are outweighed by the utility of tracepoints forthe VFS.