On Mon, May 20, 2024 at 05:35:49PM -0400, Aleksa Sarai wrote: > Now that we have stabilised the unique 64-bit mount ID interface in > statx, we can now provide a race-free way for name_to_handle_at(2) to > provide a file handle and corresponding mount without needing to worry > about racing with /proc/mountinfo parsing. What are the guarantees for the mount ID? Is it stable across reboots? If not mixing it with file handles is a very bad idea.