cpus in cgroups being used by tasks outside the group
Issue
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From a previous discussion, I was under the impression that if I setup a cpuset in a cgroup and then set cpuset.cpu_exclusive to 1 in that group, that the CPUs in the group could only be used by tasks assigned to that group. Although I do see the tasks I assign to that group staying on the cpus in the group, I also see outside processes using the CPUs.
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Am I mistaken on what that parameter is supposed to do? Is there a way to isolate the CPUs in my group so that nothing other than the tasks I've assigned to the group can use them?
Environment
- Red Hat Enterprise Linux 6.3
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