The single FUSE process can coordinate all that with an in-memory mutex. This thread is in the context of filesystems like ext4, which are completely unsafe fo

The single FUSE process can coordinate all that with an in-memory mutex. This thread is in the context of filesystems like ext4, which are completely unsafe for concurrent mounts - if you connect from multiple machines then it will just corrupt horrifically. If your filesystem was glusterfs, moose/lizard, or lustre, then they have ways to handle this (with on-disk locks/semaphores in some other sector).