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72c6303acf
To make CPUs in isolated cpuset partition closer in isolation to the boot time isolated CPUs specified in the "isolcpus" boot command line option, we need to take those CPUs out of the workqueue unbound cpumask so that work functions from the unbound workqueues won't run on those CPUs. Otherwise, they will interfere the user tasks running on those isolated CPUs. With the introduction of the workqueue_unbound_exclude_cpumask() helper function in an earlier commit, those isolated CPUs can now be taken out from the workqueue unbound cpumask. This patch also updates cgroup-v2.rst to mention that isolated CPUs will be excluded from unbound workqueue cpumask as well as updating test_cpuset_prs.sh to verify the correctness of the new *cpuset.cpus.isolated file, if available via cgroup_debug option. Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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