Comment 3 for bug 1028933

On 3.2.0.24
mount -t cgroup none /cpusets/ -o cpuset,noprefix
ll /cpusets/
total 4
drwxr-xr-x 2 root root 0 Jul 25 17:14 ./
drwxr-xr-x 24 root root 4096 Jul 24 11:14 ../
-rw-r--r-- 1 root root 0 Jul 25 17:14 cgroup.clone_children
--w--w--w- 1 root root 0 Jul 25 17:14 cgroup.event_control
-rw-r--r-- 1 root root 0 Jul 25 17:14 cgroup.procs
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpu_exclusive
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpus
-rw-r--r-- 1 root root 0 Jul 25 17:14 mem_exclusive
-rw-r--r-- 1 root root 0 Jul 25 17:14 mem_hardwall
-rw-r--r-- 1 root root 0 Jul 25 17:14 memory_migrate
-r--r--r-- 1 root root 0 Jul 25 17:14 memory_pressure
-rw-r--r-- 1 root root 0 Jul 25 17:14 memory_pressure_enabled
-rw-r--r-- 1 root root 0 Jul 25 17:14 memory_spread_page
-rw-r--r-- 1 root root 0 Jul 25 17:14 memory_spread_slab
-rw-r--r-- 1 root root 0 Jul 25 17:14 mems
-rw-r--r-- 1 root root 0 Jul 25 17:14 notify_on_release
-rw-r--r-- 1 root root 0 Jul 25 17:14 release_agent
-rw-r--r-- 1 root root 0 Jul 25 17:14 sched_load_balance
-rw-r--r-- 1 root root 0 Jul 25 17:14 sched_relax_domain_level
-rw-r--r-- 1 root root 0 Jul 25 17:14 tasks

mount -t cgroup none /cpusets/ -o cpuset
ll /cpusets/
total 4
drwxr-xr-x 2 root root 0 Jul 25 17:14 ./
drwxr-xr-x 24 root root 4096 Jul 24 11:14 ../
-rw-r--r-- 1 root root 0 Jul 25 17:14 cgroup.clone_children
--w--w--w- 1 root root 0 Jul 25 17:14 cgroup.event_control
-rw-r--r-- 1 root root 0 Jul 25 17:14 cgroup.procs
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpuset.cpu_exclusive
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpuset.cpus
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpuset.mem_exclusive
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpuset.mem_hardwall
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpuset.memory_migrate
-r--r--r-- 1 root root 0 Jul 25 17:14 cpuset.memory_pressure
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpuset.memory_pressure_enabled
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpuset.memory_spread_page
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpuset.memory_spread_slab
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpuset.mems
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpuset.sched_load_balance
-rw-r--r-- 1 root root 0 Jul 25 17:14 cpuset.sched_relax_domain_level
-rw-r--r-- 1 root root 0 Jul 25 17:14 notify_on_release
-rw-r--r-- 1 root root 0 Jul 25 17:14 release_agent
-rw-r--r-- 1 root root 0 Jul 25 17:14 tasks

But on 3.2.0.26+ noprefix option seems to be ignored (or broken)