Serge, This is the output of what you have request.
root@ubuntu1504:/sys/fs/cgroup/cpuset# cat cpuset.cpus ; cat user.slice/cpuset.cpus 0-7 0-6 root@ubuntu1504:/sys/fs/cgroup/cpuset# cgm listcontrollers blkio cpu,cpuacct devices freezer hugetlb memory net_cls,net_prio perf_event name=systemd root@ubuntu1504:/sys/fs/cgroup/cpuset# ps aux | grep cgmanager root 28368 0.0 0.1 5120 4352 ? Ss Apr07 0:00 /sbin/cgmanager -m name=systemd -M cpuset root@ubuntu1504:/sys/fs/cgroup/cpuset# cat /proc/28368/mountinfo 55 88 0:36 / /run/cgmanager/fs rw,relatime - tmpfs cgmfs rw,size=128k,mode=755 73 87 0:4 / /proc rw,nosuid,nodev,noexec,relatime - proc proc rw 74 73 0:31 / /proc/sys/fs/binfmt_misc rw,relatime - autofs systemd-1 rw,fd=21,pgrp=1,timeout=300,minproto=5,maxproto=5,direct 76 55 0:23 / /run/cgmanager/fs/blkio rw,relatime - cgroup blkio rw,blkio 77 55 0:25 / /run/cgmanager/fs/cpu rw,relatime - cgroup cpu rw,cpu,cpuacct 78 55 0:25 / /run/cgmanager/fs/cpuacct rw,relatime - cgroup cpuacct rw,cpu,cpuacct 79 55 0:24 / /run/cgmanager/fs/devices rw,relatime - cgroup devices rw,devices 80 55 0:30 / /run/cgmanager/fs/freezer rw,relatime - cgroup freezer rw,freezer 81 55 0:29 / /run/cgmanager/fs/hugetlb rw,relatime - cgroup hugetlb rw,hugetlb,release_agent=/run/cgmanager/agents/cgm-release-agent.hugetlb 82 55 0:26 / /run/cgmanager/fs/memory rw,relatime - cgroup memory rw,memory 83 55 0:22 / /run/cgmanager/fs/net_cls rw,relatime - cgroup net_cls rw,net_cls,net_prio 84 55 0:22 / /run/cgmanager/fs/net_prio rw,relatime - cgroup net_prio rw,net_cls,net_prio 85 55 0:28 / /run/cgmanager/fs/perf_event rw,relatime - cgroup perf_event rw,perf_event,release_agent=/run/cgmanager/agents/cgm-release-agent.perf_event 86 55 0:20 / /run/cgmanager/fs/none,name=systemd rw,relatime - cgroup none,name=systemd rw,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd 87 45 253:2 / / rw,relatime - ext4 /dev/disk/by-uuid/1ce3e5ed-71cf-4682-91f5-261804741e81 rw,errors=remount-ro,data=ordered 88 87 0:16 / /run rw,nosuid,noexec,relatime - tmpfs tmpfs rw,size=403904k,mode=755 root@ubuntu1504:/sys/fs/cgroup/cpuset# cat /proc/self/mountinfo 16 21 0:15 / /sys rw,nosuid,nodev,noexec,relatime shared:7 - sysfs sysfs rw 17 21 0:4 / /proc rw,nosuid,nodev,noexec,relatime shared:12 - proc proc rw 18 21 0:6 / /dev rw,relatime shared:2 - devtmpfs udev rw,size=1972160k,nr_inodes=30815,mode=755 19 18 0:13 / /dev/pts rw,nosuid,noexec,relatime shared:3 - devpts devpts rw,gid=5,mode=620,ptmxmode=000 20 21 0:16 / /run rw,nosuid,noexec,relatime shared:5 - tmpfs tmpfs rw,size=403904k,mode=755 21 0 253:2 / / rw,relatime shared:1 - ext4 /dev/disk/by-uuid/1ce3e5ed-71cf-4682-91f5-261804741e81 rw,errors=remount-ro,data=ordered 22 16 0:11 / /sys/kernel/security rw,nosuid,nodev,noexec,relatime shared:8 - securityfs securityfs rw 23 18 0:17 / /dev/shm rw,nosuid,nodev shared:4 - tmpfs tmpfs rw 24 20 0:18 / /run/lock rw,nosuid,nodev,noexec,relatime shared:6 - tmpfs tmpfs rw,size=5120k 25 16 0:19 / /sys/fs/cgroup rw shared:9 - tmpfs tmpfs rw,mode=755 26 25 0:20 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime shared:10 - cgroup cgroup rw,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd 27 16 0:21 / /sys/fs/pstore rw,nosuid,nodev,noexec,relatime shared:11 - pstore pstore rw 28 25 0:22 / /sys/fs/cgroup/net_cls,net_prio rw,nosuid,nodev,noexec,relatime shared:13 - cgroup cgroup rw,net_cls,net_prio 29 25 0:23 / /sys/fs/cgroup/blkio rw,nosuid,nodev,noexec,relatime shared:14 - cgroup cgroup rw,blkio 30 25 0:24 / /sys/fs/cgroup/devices rw,nosuid,nodev,noexec,relatime shared:15 - cgroup cgroup rw,devices 31 25 0:25 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:16 - cgroup cgroup rw,cpu,cpuacct 32 25 0:26 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:17 - cgroup cgroup rw,memory 33 25 0:27 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:18 - cgroup cgroup rw,cpuset,clone_children 34 25 0:28 / /sys/fs/cgroup/perf_event rw,nosuid,nodev,noexec,relatime shared:19 - cgroup cgroup rw,perf_event,release_agent=/run/cgmanager/agents/cgm-release-agent.perf_event 35 25 0:29 / /sys/fs/cgroup/hugetlb rw,nosuid,nodev,noexec,relatime shared:20 - cgroup cgroup rw,hugetlb,release_agent=/run/cgmanager/agents/cgm-release-agent.hugetlb 36 25 0:30 / /sys/fs/cgroup/freezer rw,nosuid,nodev,noexec,relatime shared:21 - cgroup cgroup rw,freezer 37 17 0:31 / /proc/sys/fs/binfmt_misc rw,relatime shared:22 - autofs systemd-1 rw,fd=21,pgrp=1,timeout=300,minproto=5,maxproto=5,direct 38 16 0:7 / /sys/kernel/debug rw,relatime shared:23 - debugfs debugfs rw 39 18 0:14 / /dev/mqueue rw,relatime shared:24 - mqueue mqueue rw 40 16 0:32 / /sys/fs/fuse/connections rw,relatime shared:25 - fusectl fusectl rw 41 20 0:33 / /run/cgmanager/fs rw,relatime shared:26 - tmpfs cgmfs rw,size=128k,mode=755 42 41 0:35 / /run/cgmanager/fs rw,relatime shared:28 - tmpfs cgmfs rw,size=128k,mode=755 44 42 0:36 / /run/cgmanager/fs rw,relatime shared:29 - tmpfs cgmfs rw,size=128k,mode=755 43 20 0:34 / /run/user/1000 rw,nosuid,nodev,relatime shared:27 - tmpfs tmpfs rw,size=403904k,mode=700,uid=1000,gid=1000 46 37 0:37 / /proc/sys/fs/binfmt_misc rw,relatime shared:30 - binfmt_misc binfmt_misc rw -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1392176 Title: mounts cgroups unconditionally which causes undesired effects with cpu hotplug Status in cgmanager package in Ubuntu: Confirmed Status in linux package in Ubuntu: Confirmed Bug description: == Comment: #0 - Preeti U. Murthy <preeti.mur...@in.ibm.com> - 2014-10-20 04:40:12 == ---Problem Description--- Systemd mounts cgroups explicitly every boot. Since the user had no say in it, undesired consequences are observed in reaction to cpu hotplug operations. Here is how. Systemd moves the tasks to the cgroup mounted by it. This cgroup automatically becomes the child of the root cgroup which is present by default. The children cgroups are not expected to remember their configured cpusets after hotplug operations in the kernel. Hence when cpus are taken offline and brought back online they are no longer used for load balancing of tasks and hence remain unused. This is an undesired consequence because the user had not even asked for cgroups to be mounted, yet is not able to use the full capacity of the system. Only when the user himself creates cgroup hierarchies, should he be exposed to the side effects of cpu hotplug on cpusets. Else all online cpus must be made available to him which is not happening since systemd mounts cgroups on every boot. Hence please revert this feature or provide an explaination as to why this is being done. ---uname output--- Linux tul181p1 3.16.0-18-generic #25-Ubuntu SMP Fri Sep 26 02:39:53 UTC 2014 ppc64le ppc64le ppc64le GNU/Linux Machine Type = Tuleta 8286-42A ---Debugger--- A debugger was configured, however the system did not enter into the debugger ---Steps to Reproduce--- $ taskset -p $$ $ 0-127 $ echo 0 > /sys/devices/system/cpu/cpu7/online $ taskset -p $$ $ 0-6,8-127 $ echo 1 > /sys/devices/system/cpu/cpu7/online $ taskset -p $$ $ 0-6,8-127 Userspace tool common name: systemd The userspace tool has the following bit modes: 64-bit Userspace rpm: systemd_208-8ubuntu8_ppc64el.deb Userspace tool obtained from project website: 208-8ubuntu8 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cgmanager/+bug/1392176/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
