GNU Hurd

What do you think of it? It seems pretty interesting. Microkernels clearly are superior to monolithic kernels.

http://en.wikipedia.org/wiki/GNU_Hurd

>>8

Mach's system is quite mature and doesn't need any work done to it

I dissagree, while the idea was nice the implemetation was not as good and some others stuff had been deprecated by newer better ideas. Some rt mach implemetations had even 2x times faster RPC while keeping most of the features.
Bad features like renaming port rights made them to use inferior data structures inside the kernel.

One of Hurd's major problems is that the Hurd programmers found it unexpectedly difficult to debug multiserver programs within the context of Hurd

Mach had some really nice facilities for debugging, I have no idea why they were not able to debug these programs