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A comment on Global Kernel Locks in APFS. Parent comment

Re:Global Kernel Locks in APFS by Phrodo_00 on Monday October 29, 2018 @09:09PM (#18333191)
I thought it was a mixture of OSFMK and BSD, which is why I said it can act like a microkernel. Don't know more than what wikipedia says, though.
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Re:Global Kernel Locks in APFS by rayiner on Monday October 29, 2018 @09:34PM (#18333343)
Yes, it is, but the Mach layer and BSD layer were fused into a monolithic kernel before NeXT Step turned into OS X. In OS X, HFS (and presumably APFS) are in the BSD layer.
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