--- /tmp/dphys-swapfile	2011-01-24 02:44:17.000000000 +0000
+++ /sbin/dphys-swapfile	2011-01-24 02:56:48.000000000 +0000
@@ -46,10 +46,7 @@
     if [ "${CONF_SWAPSIZE}" = "" ] ; then
       # compute automatic optimal size
       echo -n "computing size, "
-      # this seems to be the nearest to physical RAM size, lacks about 60k
-      KCORESIZE="`ls -l /proc/kcore | awk '{ print $5 }'`"
-      # make MBytes which rounded down will be exactly 1 too few, so add 1
-      MEMSIZE="`expr "${KCORESIZE}" / 1048576 + 1`"
+      MEMSIZE=$(($(cat /proc/meminfo | awk '/^MemTotal/ { print $2 }') / 1024))
       # default, without config file overwriding, swap=2*RAM
       CONF_SWAPSIZE="`expr "${MEMSIZE}" '*' "${SWAPFACTOR}"`"
     fi