Document that cpuset.cpus.partition=isolated now drives runtime updates of the housekeeping masks for kernel-noise types: nohz_full (tick suppression), RCU NOCB offloading, and managed IRQ migration. No additional cgroupfs files are required; the partition update path automatically triggers explicit housekeeping callbacks for all affected subsystems.
Signed-off-by: Jing Wu <[email protected]> Signed-off-by: Qiliang Yuan <[email protected]> --- Documentation/admin-guide/cgroup-v2.rst | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst index 6efd0095ed995..7c3b048e75cb5 100644 --- a/Documentation/admin-guide/cgroup-v2.rst +++ b/Documentation/admin-guide/cgroup-v2.rst @@ -2721,6 +2721,14 @@ Cpuset Interface Files kernel boot command line option. If those CPUs are to be put into a partition, they have to be used in an isolated partition. + When an isolated partition is created or destroyed, the kernel + automatically drives runtime updates of the housekeeping masks + for kernel-noise types (nohz_full, RCU NOCB, managed IRQ + interrupts). This extends isolation beyond scheduler domains: + the tick is stopped on isolated CPUs, RCU callbacks are + offloaded to housekeeping cores, and managed interrupts are + migrated away. No additional cgroupfs files are required. + Device controller ----------------- -- 2.43.0
