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• set kvmclock.disable=true in /etc/cloudstack/agent/agent.properties
• Fix cgroup co-mounting error in RHEL7: 
  • unmount all cgroups:  
    • umount /sys/fs/cgroup/cpu,cpuacct
    • umount /sys/fs/cgroup/cpuset
    • umount  /sys/fs/cgroup/memory
    • umount  /sys/fs/cgroup/devices
    • umount  /sys/fs/cgroup/freezer
    • umount  /sys/fs/cgroup/net_cls
    • umount  /sys/fs/cgroup/blkio
  • rm /sys/fs/cgroup/cpu /sys/fs/cgroup/cpuacct
  • Add following in /etc/cgconfig.conf

mount {
cpuset            cpuset = /sys/fs/cgroup/cpuset;
cpu            cpu = /sys/fs/cgroup/cpu;
cpuacct            cpuacct = /sys/fs/cgroup/cpuacct;
memory            memory = /sys/fs/cgroup/memory;
devices            devices = /sys/fs/cgroup/devices;
freezer            freezer = /sys/fs/cgroup/freezer;
net           net_cls = /sys/fs/cgroup/net_cls;
blkio            blkio = /sys/fs/cgroup/blkio;
}

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