CPUSet is no more working on 3.2.0.26+

[Poil]

cpuset is searching for (here on a 12.04 3.2.0.24)
ll /cpusets/
total 4
drwxr-xr-x 2 root root 0 Jul 24 11:14 ./
drwxr-xr-x 24 root root 4096 Jul 24 11:14 ../
-rw-r--r-- 1 root root 0 Jul 24 11:14 cgroup.clone_children
--w--w--w- 1 root root 0 Jul 24 11:14 cgroup.event_control
-rw-r--r-- 1 root root 0 Jul 24 11:14 cgroup.procs
-rw-r--r-- 1 root root 0 Jul 24 11:14 cpu_exclusive
-rw-r--r-- 1 root root 0 Jul 24 11:14 cpus
-rw-r--r-- 1 root root 0 Jul 24 11:14 mem_exclusive
-rw-r--r-- 1 root root 0 Jul 24 11:14 mem_hardwall
-rw-r--r-- 1 root root 0 Jul 24 11:14 memory_migrate
-r--r--r-- 1 root root 0 Jul 24 11:14 memory_pressure
-rw-r--r-- 1 root root 0 Jul 24 11:14 memory_pressure_enabled
-rw-r--r-- 1 root root 0 Jul 24 11:14 memory_spread_page
-rw-r--r-- 1 root root 0 Jul 24 11:14 memory_spread_slab
-rw-r--r-- 1 root root 0 Jul 24 11:14 mems
-rw-r--r-- 1 root root 0 Jul 24 11:14 notify_on_release
-rw-r--r-- 1 root root 0 Jul 24 11:14 release_agent
-rw-r--r-- 1 root root 0 Jul 24 11:14 sched_load_balance
-rw-r--r-- 1 root root 0 Jul 24 11:14 sched_relax_domain_level
-rw-r--r-- 1 root root 0 Jul 24 11:14 tasks

But in 3.2.0.26+ we have
ll /cpusets/
total 4
drwxr-xr-x 3 root root 0 Jul 24 17:19 ./
drwxr-xr-x 24 root root 4096 Jul 25 16:14 ../
-rw-r--r-- 1 root root 0 Jul 24 17:19 cgroup.clone_children
--w--w--w- 1 root root 0 Jul 24 17:19 cgroup.event_control
-rw-r--r-- 1 root root 0 Jul 24 17:19 cgroup.procs
-rw-r--r-- 1 root root 0 Jul 24 17:19 cpuset.cpu_exclusive
-rw-r--r-- 1 root root 0 Jul 24 17:19 cpuset.cpus
-rw-r--r-- 1 root root 0 Jul 24 17:19 cpuset.mem_exclusive
-rw-r--r-- 1 root root 0 Jul 24 17:19 cpuset.mem_hardwall
-rw-r--r-- 1 root root 0 Jul 24 17:19 cpuset.memory_migrate
-r--r--r-- 1 root root 0 Jul 24 17:19 cpuset.memory_pressure
-rw-r--r-- 1 root root 0 Jul 24 17:19 cpuset.memory_pressure_enabled
-rw-r--r-- 1 root root 0 Jul 24 17:19 cpuset.memory_spread_page
-rw-r--r-- 1 root root 0 Jul 24 17:19 cpuset.memory_spread_slab
-rw-r--r-- 1 root root 0 Jul 24 17:19 cpuset.mems
-rw-r--r-- 1 root root 0 Jul 24 17:19 cpuset.sched_load_balance
-rw-r--r-- 1 root root 0 Jul 24 17:19 cpuset.sched_relax_domain_level
drwxr-xr-x 4 root root 0 Jul 24 17:20 libvirt/
-rw-r--r-- 1 root root 0 Jul 24 17:19 notify_on_release
-rw-r--r-- 1 root root 0 Jul 24 17:19 release_agent
-rw-r--r-- 1 root root 0 Jul 24 17:19 tasks

So we need to change all path in the cset binary or we have this error
# cset set
cset: /cpusets/libvirt/lxc is not a cpuset directory
cset: **> /cpusets/libvirt/lxc is not a cpuset directory

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Poil (poil)]

More info ?
http://gitorious.org/linux-omap/mainline/commit/f9ab5b5b0f5be506640321d710b0acd3dca6154a

[Poil (poil)]

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)

[Poil (poil)]

Ok, I've reproduce it on 2 others servers
1- install cpuset
cset set
> working

2- Install libvirt
aptitude install -y qemu-kvm libvirt-bin virtinst kvm-pxe

3- try again
cset set
> working (/cpuset is always mounted with noprefix)

4- Reboot
reboot

5- Try cset again
cset set
> error, /cpuset is prefixed
ll /cpuset/

[Alex Moldovan (alexmoldovan)]

libvirt-bin depends on cgroup-lite and so cset is not working properly once cgroup-lite is installed and the computer rebooted.

[Mark Petersen (mpetersen-peak6)]

Is there a workaround? Is cgroup-lite really necessary for libvirt-bin?

[Poil (poil)]

Full cset.py patched here : http://code.google.com/p/cpuset/issues/detail?id=10

[Launchpad Janitor (janitor)]

This bug was fixed in the package cpuset - 1.5.6-3

---------------
cpuset (1.5.6-3) unstable; urgency=low

  * Include updated watch file.
  * Update Standards-Version to 3.9.4 (no changes)
  * Add Homepage field to debian/control
  * Patch cset.py to account for filesystem prefixes (LP: #1028933, #1075997)

 -- Roberto C. Sanchez <email address hidden> Sat, 03 Aug 2013 11:28:50 -0400