I have uploaded a proof of concept patch:
http://phk.freebsd.dk/patch/fd_dev.patch
...And with this code enabled, it is possible to go from userland to device driver without touching Giant underway.
I'm sorry, I can't parse that last sentence. Could you explain in 25 words or less (or 3 lines of code) what it means?
'Giant' is the lock that Alan is trying to get rid of?
Thanks!
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