Search notes:

scripts/kconfig/streamline_config.pl

scripts/kconfig/streamline_config.pl gives the ability to turn off all kernel modules that are not loaded in a system.
The comments in the script suggest to use this script as follows: 
cd /usr/src/linux-2.6.10
cp /boot/config-2.6.10-1-686-smp .config
~/bin/streamline_config > config_strip
mv .config config_sav
mv config_strip .config
make oldconfig
It seems to me that the line reading ~/bin/streamline_config should rather be reaing ./scripts/kconfig/streamline_config.pl.

See also

scripts/kconfig/

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