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 DHM subsystems to subscribe to and maintain independent affinity masks. Signed-off-by: Qiliang Yuan <[email protected]> --- include/linux/sched/isolation.h | 20 ++++++++------------ kernel/sched/isolation.c | 10 +++++++++- 2 files changed, 17 insertions(+), 13 deletions(-) diff --git a/include/linux/sched/isolation.h b/include/linux/sched/isolation.h index dc3975ff1b2e1..b9a041247565c 100644 --- a/include/linux/sched/isolation.h +++ b/include/linux/sched/isolation.h @@ -17,21 +17,17 @@ enum hk_type { /* Inverse of boot-time isolcpus=managed_irq argument */ HK_TYPE_MANAGED_IRQ, /* Inverse of boot-time nohz_full= or isolcpus=nohz arguments */ - 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 + #ifdef CONFIG_CPU_ISOLATION DECLARE_STATIC_KEY_FALSE(housekeeping_overridden); extern int housekeeping_any_cpu(enum hk_type type); diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c index ef152d401fe20..e05ed5118e651 100644 --- a/kernel/sched/isolation.c +++ b/kernel/sched/isolation.c @@ -15,9 +15,17 @@ enum hk_flags { HK_FLAG_DOMAIN_BOOT = BIT(HK_TYPE_DOMAIN_BOOT), HK_FLAG_DOMAIN = BIT(HK_TYPE_DOMAIN), HK_FLAG_MANAGED_IRQ = BIT(HK_TYPE_MANAGED_IRQ), - HK_FLAG_KERNEL_NOISE = BIT(HK_TYPE_KERNEL_NOISE), + HK_FLAG_TICK = BIT(HK_TYPE_TICK), + HK_FLAG_TIMER = BIT(HK_TYPE_TIMER), + HK_FLAG_RCU = BIT(HK_TYPE_RCU), + HK_FLAG_MISC = BIT(HK_TYPE_MISC), + HK_FLAG_WQ = BIT(HK_TYPE_WQ), + HK_FLAG_KTHREAD = BIT(HK_TYPE_KTHREAD), }; +#define HK_FLAG_KERNEL_NOISE (HK_FLAG_TICK | HK_FLAG_TIMER | HK_FLAG_RCU | \ + HK_FLAG_MISC | HK_FLAG_WQ | HK_FLAG_KTHREAD) + DEFINE_STATIC_KEY_FALSE(housekeeping_overridden); EXPORT_SYMBOL_GPL(housekeeping_overridden); -- 2.43.0
