Good evening,
  
What are the functionality for the file systems below:
  
file-system 	FDESC		# /dev/fd  
file-system 	KERNFS		# /kern  
file-system 	NULLFS		# loopback file system  
file-system 	OVERLAY		# overlay file system  
file-system 	PORTAL		# portal filesystem (still experimental)  
file-system 	PROCFS		# /proc  
file-system 	UMAPFS		# NULLFS + uid and gid remapping  
file-system 	UNION		# union file system
  
Do netbsd kernel use these for performance related functions or I really don't
 
need these in my custom configuration?
  
Also, does having these enhance the web surfing speeds etc?
  
options 	PPP_BSDCOMP	# BSD-Compress compression support for PPP  
options 	PPP_DEFLATE	# Deflate compression support for PPP  
options 	PPP_FILTER	# Active filter support for PPP (requires bpf)  
options 	PFIL_HOOKS	# pfil(9) packet filter hooks
  
My computer has direct connection to net and at the moment I only have inet  
option enabled in kernel.  However, if having above improves the performance  
or are needed for full kernel functionings, I may want to add them back.
  
Do we also need these options when you have sound card?
  
pcppi0		at isa?  
sysbeep0	at pcppi?

  
Thank you.
  
Yours sincerely,  
S. N. Cho,  
Thursday, Feb. 06, 2003.

 --  
Sung N. Cho 
Dept. of Physics, VPI&SU 
Blacksburg, VA. 24061 
U.S.A