rebooted
opened debian
output of closechroot

7176 2.9 0.0 /usr/sbin/apache2 -k start
Nokia-N900:~# closechroot
Closing the chroot...
...closing chroot apps...
..Unmounting bound dirs...
unmounting /.debian/dev
unmounting /.debian/proc
unmounting /.debian/tmp
unmounting /.debian/var/tmp
unmounting /.debian/sys
unmounting /.debian/home
unmounting /.debian/var/run/dbus
unmounting /.debian/var/lib/dbus
unmounting /.debian/var/run/pulse
..Unmounting /.debian...
successful unmount...
chroot closed.

output of top immediatly after

.0% io 0.0% irq 0.0
Load average: 0.68 0.85 0.55
PID PPID USER STAT RSS %MEM %CPU COMMAND
991 672 root S < 21216 8.6 27.2 /usr/bin/Xorg -logfile /tmp/X
2183 2018 root R 576 0.2 9.0 top
2096 1340 user S 52540 21.3 0.0 /usr/sbin/browserd -s 2096 -n
2138 1340 user S 23048 9.3 0.0 /usr/sbin/browserd -s 2138 -n
2095 1178 user S 21228 8.6 0.0 /usr/bin/browser
2161 1178 user S 15820 6.4 0.0 /usr/bin/modest
2155 1178 user S 13108 5.3 0.0 /usr/bin/image-viewer
1290 1178 user S 10808 4.3 0.0 /usr/bin/hildon-status-menu
2132 1178 user S 10740 4.3 0.0 /usr/bin/rtcom-messaging-ui
2124 1178 user S 10368 4.2 0.0 /usr/bin/osso-addressbook
2128 1178 user S 10216 4.1 0.0 /usr/bin/rtcom-call-ui
2158 1178 user S 10124 4.1 0.0 /usr/bin/Calendar

thanks