> Linus is not saying that microkernels are architecturally bad. He concedes that it is an architecturally superior idea
This is what he actually said on Slashdot (my emphasis added):
> I think microkernels are stupid. They push the problem space into communication, which is actually a much bigger and fundamental problem than the small problem they are purporting to fix. They also lead to horrible extra complexity as you then have to fight the microkernel model, and make up new ways to avoid the extra communication latencies etc. Hurd is a great example of this kind of suckiness, where people made up whole new memory mapping models just because the normal "just make a quick system call within the same context" model had been broken by the microkernel model.
This is what he actually said on Slashdot (my emphasis added):
> I think microkernels are stupid. They push the problem space into communication, which is actually a much bigger and fundamental problem than the small problem they are purporting to fix. They also lead to horrible extra complexity as you then have to fight the microkernel model, and make up new ways to avoid the extra communication latencies etc. Hurd is a great example of this kind of suckiness, where people made up whole new memory mapping models just because the normal "just make a quick system call within the same context" model had been broken by the microkernel model.