Hope had been that the kernel's new support for cpuset.effective_cpus would fix this. Removing a cpu from a parent cgroup or offlining a cpu would remove it from effective_cpus, but not from cpuset.cpus. Apparently that's not the case (kernel 3.19.0-10-generic was used for the test in comment #27)
** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: New => Confirmed ** Changed in: cgmanager (Ubuntu) Status: Fix Released => Confirmed -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to cgmanager in Ubuntu. https://bugs.launchpad.net/bugs/1392176 Title: mounts cgroups unconditionally which causes undesired effects with cpu hotplug To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cgmanager/+bug/1392176/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs