[PATCH 03/15] sched/isolation: Separate housekeeping types in enum hk_type

[Qiliang Yuan]

Most kernel noise types (TICK, TIMER, RCU, etc.) are currently
aliased to a single HK_TYPE_KERNEL_NOISE enum value. This prevents
fine-grained runtime isolation control as all masks are forced to be
identical.

Un-alias service-specific housekeeping types in enum hk_type.

This separation provides the necessary granularity for DHEI subsystems
to subscribe to and maintain independent affinity masks.

Signed-off-by: Qiliang Yuan <realwujing@xxxxxxxxx>
---
 include/linux/sched/isolation.h | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/include/linux/sched/isolation.h b/include/linux/sched/isolation.h
index 9df55237d3901..6ec64eb3f8bcb 100644
--- a/include/linux/sched/isolation.h
+++ b/include/linux/sched/isolation.h
@@ -10,21 +10,18 @@
 enum hk_type {
 	HK_TYPE_DOMAIN,
 	HK_TYPE_MANAGED_IRQ,
-	HK_TYPE_KERNEL_NOISE,
+	HK_TYPE_TICK,
+	HK_TYPE_TIMER,
+	HK_TYPE_RCU,
+	HK_TYPE_MISC,
+	HK_TYPE_WQ,
+	HK_TYPE_KTHREAD,
 	HK_TYPE_MAX,
 
-	/*
-	 * The following housekeeping types are only set by the nohz_full
-	 * boot commandline option. So they can share the same value.
-	 */
-	HK_TYPE_TICK    = HK_TYPE_KERNEL_NOISE,
-	HK_TYPE_TIMER   = HK_TYPE_KERNEL_NOISE,
-	HK_TYPE_RCU     = HK_TYPE_KERNEL_NOISE,
-	HK_TYPE_MISC    = HK_TYPE_KERNEL_NOISE,
-	HK_TYPE_WQ      = HK_TYPE_KERNEL_NOISE,
-	HK_TYPE_KTHREAD = HK_TYPE_KERNEL_NOISE
 };
 
+#define HK_TYPE_KERNEL_NOISE HK_TYPE_TICK
+
 struct housekeeping_update {
 	enum hk_type type;
 	const struct cpumask *new_mask;

-- 
2.43.0