This series introduces Dynamic Housekeeping Management (DHM) to the Linux kernel.
Previously known as the DHEI (Dynamic Housekeeping Environment Interface) patchset (RFC and v1), this series has been fundamentally refactored in response to upstream feedback. The custom sysfs interface has been entirely dropped. Instead, DHM is now natively integrated into the cgroup v2 cpuset controller. By exposing `cpuset.housekeeping.cpus` on the root cgroup, system administrators and workload orchestrators (like Kubernetes) can dynamically update the kernel's global housekeeping masks at runtime, without requiring a node reboot. This version provides dynamic reconfiguration support for the following subsystems: - RCU (NOCB offloading) - Tick/NOHZ (Full dynticks) - Global Workqueues and Timers - Managed Interrupts (genirq) - Hardlockup Detectors (Watchdog) - Scheduler Domains (Isolation) - Memory Management (vmstat/lru_add_drain) - Kthreads and Softirqs (Affinity) Many thanks to the maintainers for the valuable guidance that led to this significantly improved and upstream-aligned architecture. To: Ingo Molnar <[email protected]> To: Peter Zijlstra <[email protected]> To: Juri Lelli <[email protected]> To: Vincent Guittot <[email protected]> To: Dietmar Eggemann <[email protected]> To: Steven Rostedt <[email protected]> To: Ben Segall <[email protected]> To: Mel Gorman <[email protected]> To: Valentin Schneider <[email protected]> To: Paul E. McKenney <[email protected]> To: Frederic Weisbecker <[email protected]> To: Neeraj Upadhyay <[email protected]> To: Joel Fernandes <[email protected]> To: Josh Triplett <[email protected]> To: Boqun Feng <[email protected]> To: Uladzislau Rezki <[email protected]> To: Mathieu Desnoyers <[email protected]> To: Lai Jiangshan <[email protected]> To: Zqiang <[email protected]> To: Anna-Maria Behnsen <[email protected]> To: Ingo Molnar <[email protected]> To: Thomas Gleixner <[email protected]> To: Tejun Heo <[email protected]> To: Andrew Morton <[email protected]> To: Vlastimil Babka <[email protected]> To: Suren Baghdasaryan <[email protected]> To: Michal Hocko <[email protected]> To: Brendan Jackman <[email protected]> To: Johannes Weiner <[email protected]> To: Zi Yan <[email protected]> To: Waiman Long <[email protected]> To: Chen Ridong <[email protected]> To: Michal Koutný <[email protected]> To: Jonathan Corbet <[email protected]> To: Shuah Khan <[email protected]> To: Shuah Khan <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Changes in v2: - Rebranded series from DHEI to DHM (Dynamic Housekeeping Management). - Entirely dropped custom sysfs interface. - Integrated housekeeping control into cgroup v2 cpuset controller at the root level. - Added SMT-aware pipeline logic (cpuset.housekeeping.smt_aware) to prevent splitting SMT siblings. - Added comprehensive documentation and cgroup functional selftests for the DHM APIs. - Refactored the internal mask transition logic to use RCU-safe handover. - Separated patch series into 4 logical phases for review. v1 Link: https://lore.kernel.org/all/[email protected] Signed-off-by: Qiliang Yuan <[email protected]> --- Qiliang Yuan (12): sched/isolation: Separate housekeeping types in enum hk_type sched/isolation: Introduce housekeeping notifier infrastructure rcu: Support runtime NOCB initialization and dynamic offloading tick/nohz: Transition to dynamic full dynticks state management genirq: Support dynamic migration for managed interrupts watchdog: Allow runtime toggle of lockup detector affinity sched/core: Dynamically update scheduler domain housekeeping mask workqueue, mm: Support dynamic housekeeping mask updates cgroup/cpuset: Introduce CPUSet-driven dynamic housekeeping (DHM) cgroup/cpuset: Implement SMT-aware grouping and safety guards Documentation: cgroup-v2: Document dynamic housekeeping (DHM) selftests: cgroup: Add functional tests for dynamic housekeeping Documentation/admin-guide/cgroup-v2.rst | 24 +++++ include/linux/sched/isolation.h | 51 ++++++++--- kernel/cgroup/cpuset-internal.h | 2 + kernel/cgroup/cpuset.c | 73 +++++++++++++++ kernel/irq/manage.c | 49 ++++++++++ kernel/rcu/rcu.h | 4 + kernel/rcu/tree.c | 75 ++++++++++++++++ kernel/rcu/tree.h | 2 +- kernel/rcu/tree_nocb.h | 31 ++++--- kernel/sched/core.c | 23 +++++ kernel/sched/isolation.c | 74 ++++++++++++++- kernel/time/tick-sched.c | 130 +++++++++++++++++++++------ kernel/watchdog.c | 26 ++++++ kernel/workqueue.c | 42 +++++++++ mm/compaction.c | 27 ++++++ tools/testing/selftests/cgroup/test_cpuset.c | 36 ++++++++ 16 files changed, 620 insertions(+), 49 deletions(-) --- base-commit: bfe62a454542cfad3379f6ef5680b125f41e20f4 change-id: 20260408-wujing-dhm-8f43e2d49cd8 Best regards, -- Qiliang Yuan <[email protected]>
