Thanks for writing the man page too. I've made a few comments, mostly to make the English more grammatical and idiomatic.

This looks great, @kib! If you commit it, I'll follow up with the test suite. A few questions:

Wow! This looks much simpler than the original userspace-based implementation. I like it. I wrote some tests, too. I can commit those separately if you like, after you commit the main code. The only thing that's missing is a mention of the new option in mount_fusefs.8 . Could you please add that?

I'm afraid that with this latest patch, I get an instapanic on boot in pid 1.

Sorry, you're right @jlduran , as js just informed me elsewhere. My source tree was out of date. Sorry for the noise.