[Gumstix-users] reducing kernel size to speed up boot up time

[pjw8811 <cre...@gm...>]

Hi,
I am new to gumstix and linux but i learned a lot by playing with gumstix.
all i need for my gumstix project are wifi, usb otg as pheripheral and
gpios.
Everything is working but boot up time is just too slow and i think
libertas_sdio and udev is taking lot of time.
Currently, it takes about 3min to see wifi blue wifi led blinking from power
on.
I am using Overo air with tobi but eventaully will move to pinto-th. 
Kernel I am using is 3.0.0 + from sakoman and didn't change anything in
.config file except usb otg.
Any suggestion would be helpful.(what drivers i can remove from .config and
scripts from rc#.d) 
below is a list of modules that i am using
g_ether                35520  0
libertas_sdio          20338  1
libertas               92190  1 libertas_sdio
cfg80211              161771  1 libertas
lib80211                5435  1 libertas
firmware_class 

more questions...
I also tried to change .config file to remove some services that i can
recognize and don't use, but again, kernel spends lot of time after this
line 
"libertas_sdio: Copyright Pierre Ossman"

and sometime, with reduced kernel, i get invalid format error when inserting
module. I think either i messed up .config file or some step is missing. Do
i have to compile modules every time i rebuild kernel by "#make modules" and
"#make modules_install? then above modules are all i have to compile? it
seems i can change that in "modules.builtin." am i correct?
Thanks for reading this message.

Terry

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