[gmokki]

Doesn't the futex2 syscall allow 1 byte futexes on recent kernel?

Double checks. Nope. The api is there and the patch to implement them has been posted multiple times: https://lore.kernel.org/lkml/20241025093944.707639534@infrad...

But the small futex2 patch will not go forward until some users say they want/need the feature