cgroup/rstat: Reduce cpu_lock hold time in cgroup_rstat_flush_locked() (!3564) · Merge requests · Red Hat / centos-stream / src / kernel / centos-stream-9

Waiman Long requested to merge llong1/centos-stream-9:rhel_21091_rstat into main Jan 09, 2024

JIRA: https://issues.redhat.com/browse/RHEL-21091
MR: !3564 (merged)

The occasional latency spike in the execution of cgroup_rstat_updated() is likely caused by percpu cpu_lock contention with cgroup_rstat_flush_locked(). This MR includes upstream commits that reduce the cpu_lock hold time so to reduce the maximum latency spike to cgroup_rstat_updated().

Signed-off-by: Waiman Long longman@redhat.com

Edited Jan 09, 2024 by Waiman Long

cgroup/rstat: Reduce cpu_lock hold time in cgroup_rstat_flush_locked()

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