On Tue, Dec 05, 2023 at 05:21:14PM -0500, Waiman Long wrote: > Currently, the cpu_is_isolated() function checks only the statically > isolated CPUs specified via the "isolcpus" and "nohz_full" kernel > command line options. This function is used by vmstat and memcg to > reduce interference with isolated CPUs by not doing stat flushing > or scheduling works on those CPUs. > > Workloads running on isolated CPUs within isolated cpuset > partitions should receive the same treatment to reduce unnecessary > interference. This patch introduces a new cpuset_cpu_is_isolated() > function to be called by cpu_is_isolated() so that the set of dynamically > created cpuset isolated CPUs will be included in the check. > > Assuming that testing a bit in a cpumask is atomic, no synchronization > primitive is currently used to synchronize access to the cpuset's > isolated_cpus mask. > > Signed-off-by: Waiman Long <longman@xxxxxxxxxx> Applied to cgroup/for-6.8. Thanks. -- tejun
