Scheduler domains rely on HK_TYPE_DOMAIN to identify which CPUs are isolated from general load balancing. Currently, these boundaries are static and determined only during boot-time domain initialization.
Trigger a scheduler domain rebuild when the HK_TYPE_DOMAIN mask changes. This ensures that scheduler isolation boundaries can be reconfigured at runtime via the DHEI sysfs interface. Signed-off-by: Qiliang Yuan <[email protected]> --- kernel/sched/core.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 045f83ad261e2..ddf9951f1438c 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -39,6 +39,7 @@ #include <linux/sched/nohz.h> #include <linux/sched/rseq_api.h> #include <linux/sched/rt.h> +#include <linux/sched/topology.h> #include <linux/blkdev.h> #include <linux/context_tracking.h> @@ -10832,3 +10833,25 @@ void sched_change_end(struct sched_change_ctx *ctx) p->sched_class->prio_changed(rq, p, ctx->prio); } } + +static int sched_housekeeping_update(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct housekeeping_update *update = data; + + if (action == HK_UPDATE_MASK && update->type == HK_TYPE_DOMAIN) + rebuild_sched_domains(); + + return NOTIFY_OK; +} + +static struct notifier_block sched_housekeeping_nb = { + .notifier_call = sched_housekeeping_update, +}; + +static int __init sched_housekeeping_init(void) +{ + housekeeping_register_notifier(&sched_housekeeping_nb); + return 0; +} +late_initcall(sched_housekeeping_init); -- 2.43.0
