Hello,
as I got the same problem on my raspberry, probably I can give
some details.
This is the situation I started:
- put 2015-05-05-raspbian-wheezy.img on SD-card and booted
- changed sources.list and did the upgrade
- appended "systemd.debug-shell" to /boot/cmdline.txt
- reboot
For some reason it looks like /etc/init.d/cgroup-bin is still
installed even cgroup-bin is a transitional package.
This script tries to mount /sys/fs/cgroup/memory but seems to fail
and it then unmounts /sys/fs/cgroup.
Therefore systemd cannot create new cgroups or spawning
processes cannot attach to them.
By purging just cgroup-bin I got expected booting again.
cgroup-bin[455]: Kernel lacks cgroups or memory controller not available, not
starting cgroups. ... (warning).
systemd[1]: Failed to create cgroup /system.slice/ntp.service: No such file or
directory
systemd[481]: Failed at step CGROUP spawning /etc/init.d/ntp: No such file or
directory
Kind regards,
Bernhard
root@raspberrypi:/# dpkg -l cgroup-bin
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-==========================-==================-==================-=========================================================
ii cgroup-bin 0.41-6 all control
and monitor control groups (transitional package)
root@raspberrypi:/# dpkg -L cgroup-bin
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/cgroup-bin
/usr/share/doc/cgroup-bin/changelog.Debian.gz
/usr/share/doc/cgroup-bin/copyright
/etc/init.d/cgroup-bin
root@raspberrypi:/# ls -lisah /etc/init.d/cgroup-bin
36115 4.0K -rwxr-xr-x 1 root root 950 Dec 18 2013 /etc/init.d/cgroup-bin
root@raspberrypi:/# cat /etc/init.d/cgroup-bin
#! /bin/sh
### BEGIN INIT INFO
# Provides: init-cgroups
# Required-Start: mountkernfs
# Required-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Mounts cgroup filesystems
### END INIT INFO
PATH=/sbin:/bin
. /lib/lsb/init-functions
do_start () {
log_action_msg "Initializing cgroups"
mount -t tmpfs none /sys/fs/cgroup
mkdir /sys/fs/cgroup/memory
if ! mount -t cgroup none /sys/fs/cgroup/memory -o memory 2> /dev/null;
then
umount /sys/fs/cgroup
log_warning_msg "Kernel lacks cgroups or memory controller not
available, not starting cgroups."
exit 0
fi
chmod a+r /sys/fs/cgroup/memory/memory.pressure_level
}
case "$1" in
start)
do_start
;;
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
root@raspberrypi:/root# dpkg --purge cgroup-bin
(Reading database ... 100744 files and directories currently installed.)
Removing cgroup-bin (0.41-6) ...
Purging configuration files for cgroup-bin (0.41-6) ...
root@raspberrypi:/root# reboot -f
# as regular reboot did not work at this point anymore
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