> Mach is aging and it shows. It doesn't take advantage of modern > hardware.
Are you referring to SMP here? Where else is it deficient? > Mach isn't the fastest microkernel that's around. Is this because of its design or implementation? If design, what tradeoffs do the faster microkernels make? Speed is IMHO less important than simplicity of design, maintainability of the code base, and stability. How does gnumach fare in these categories? When you mentioned that it's aging, were you also implying cruft and bitrot? Thanks

