Ignore this post if you're seeing it for the first time.
Martin, David, this script is broken. When trying to set kernel parameters, there should be a new line, it shouldn't be explicitly removed. I know it looks weird, but this seems to be proven by this output:
kinder:/etc/init.d# ./params4flash start
kinder:/etc/init.d# cat params4flash
#! /bin/sh
exit 0
PATH=/sbin:/bin
# Max time to wait for writeout
MAX_AGE=120
CENT_AGE=$((100 * $MAX_AGE))
# Max percent of mem to use for dirty pages
DRATIO=10
# Once we write, do so until this many percent of mem is still in use
DBRATIO=1
case "$1" in
start)
echo -n 0 >> /proc/sys/vm/swappiness
echo -n $MAX_AGE >> /proc/sys/vm/laptop_mode
echo -n $CENT_AGE >> /proc/sys/vm/dirty_writeback_centisecs
echo -n $CENT_AGE >> /proc/sys/vm/dirty_expire_centisecs
echo -n $DRATIO >> /proc/sys/vm/dirty_ratio
echo -n $DBRATIO >> /proc/sys/vm/dirty_background_ratio
;;
restart|reload|force-reload)
echo "Error: argument '$1' not supported" >&2
exit 3
;;
stop)
# No-op
;;
*)
echo "Usage: $0 start|stop" >&2
exit 3
;;
esac
exit 0
kinder:/etc/init.d# cat /proc/sys/vm/swappiness
60
