Hi all,
I've found that the default mounted cgroup subsystem in util-vserver
init script are set by the variable CGROUP_SUBSYS. It is currently set
to "all" by default. I've also noticed that on kernels with
CONFIG_CGROUP_NS=y this mean that the "ns", meaning guests can't be run.
IMHO the default subsystems mounted should be all those present on the
system, excluding ns, so that Linux-Vserver may work on the widest
range of kernels. I wrote a script to set CGROUP_SUBSYS correctly in
the default case. My BASH is probably embarrassingly bad, but it gets
the job done, creating a comma separated list of subsystems:
#default to using all cgroup subsystems excluding ns
for SYS in `cat /proc/cgroups | grep -v subsys_name | grep -v ns | awk
'{print $1}'` ; do
if [ "${CGROUP_SUBSYS}" = "" ] ; then
CGROUP_SUBSYS=${SYS}
else
CGROUP_SUBSYS="${CGROUP_SUBSYS},${SYS}"
fi
done
Cheers,
==
From Ben Green