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OpenVZ and cgroups [message #48842]

Mon, 17 December 2012 14:12

polarfoxlt
Messages: 1
Registered: December 2012

Junior Member

Hello,

I have a problem mounting cgroups on hw node (Debian Squeeze):

# mount none -t cgroup /cgroup
mount: none already mounted or /cgroup busy

It is only possible to mount perf_event and net_prio subsystems. /proc/cgroups shows that some subsystems are in use:

# cat /proc/cgroups
#subsys_name    hierarchy       num_cgroups     enabled
cpuset  2       7       1
cpu     2       7       1
cpuacct 2       7       1
devices 3       6       1
freezer 3       6       1
net_cls 0       1       1
blkio   1       7       1
perf_event      0       1       1
net_prio        0       1       1

But there are no entries in /proc/mounts related to cgroups:

# cat /proc/mounts | grep cgroup
#

cgroup-bin daemons are disabled.

Some info about system:

# uname -a
Linux alytus 2.6.32-042stab065.3 #1 SMP Mon Nov 12 21:59:14 MSK 2012 x86_64 GNU/Linux

# cat /boot/config-2.6.32-042stab065.3 | grep CGROUP
CONFIG_CGROUP_SCHED=y
CONFIG_CGROUPS=y
# CONFIG_CGROUP_DEBUG is not set
CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_DEVICE=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_BLK_CGROUP=y
# CONFIG_DEBUG_BLK_CGROUP is not set
CONFIG_CGROUP_PERF=y
CONFIG_NET_CLS_CGROUP=y
CONFIG_NETPRIO_CGROUP=y

cgroups-bin daemons are disabled so no groups are mounted upon system startup.

Maybe somebody else is also experiencing similar problems?

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