krej@electrum.kth.se (Kristian Ejvind) writes:
: 
:       o it's the RISC processor  (didn't apply but that's I think a good one)
: 
:       o it might be the security code    (this is my favorite)
: 
:       o tendency to OO programming       (I wonder whether that applies to
:                                             the kernel yet)
: 
:       o networking                       (this seems to be a major factor)
: 
: 
: but does anyone know for ANY specific (rather modern) kernel more details
: like what percentage of what is responsible for which size ?
: 
: Like  networking percentage
:       filesystem    
:         process control
:       system call interface
:         security (pervading all other packages)
:       et.c. 
: 
: Nat!
: 

I think the biggest reason for the differenced is the tremendous functional
capability of un?x.  Compare all of the options for the ls command to those
offered by mess-dos's "dir" command.  Beyond that, there are other things to
consider, such as optimization capability of the compilers used to create
kernel, the percentage of hand coded machine language, etc.

billp@jupiter.cse.utoledo.edu