About the kernel extension load order

This question is about the kernel extension load sequence during the system bootup, I am wondering if there's a method can force a kext e.g A loaded by system before kext B, suppose there's no any dependency between kext A and B.


Any ideas?

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No. Well, you can force the order by using a daemon to manually load the KEXTs in a specific order, but if you’re talking about automatic loading, as done by I/O Kit KEXTs, the canonical way to define an order is via dependencies.

What is the higher-level problem you’re trying to solve here?

ps macOS’s startup sequence is highly asynchronous. You’ll regularly see situations where A has started long before B has finished, where A and B are two things that you might suppose are ordered. For example, A might be 

launchd
and B might be various KEXTs. Or A might be 
loginwindow
and B might be various daemons. It’s even possible for 
loginwindow
to be up and running before all your KEXTs are loaded.

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