Hi Daniel, I got several dmsg outputs like this after I insmod the 'wip' into system(with printk+dump_stack reactor, trivial changes for the wip): [78706.972957] event sched_waking not expected in the state preemptive [78706.972963] CPU: 2 PID: 410 Comm: kworker/2:4 Tainted: G OE 5.15.70-rt50 #1 [78706.972972] Workqueue: events igb_watchdog_task [igb] [78706.973000] Call Trace: [78706.973003] <IRQ> [78706.973006] dump_stack_lvl+0x61/0x86 [78706.973016] dump_stack+0x10/0x18 [78706.973022] handle_sched_wakeup+0x92/0xd0 [rv_poc] [78706.973028] ttwu_do_wakeup+0xc3/0x1d0 [78706.973038] ttwu_do_activate+0x6e/0x100 [78706.973044] try_to_wake_up+0x209/0x700 [78706.973049] ? hrtimer_interrupt+0x11f/0x230 [78706.973059] wake_up_process+0x15/0x30 [78706.973065] irq_exit_rcu+0x9b/0xe0 [78706.973074] sysvec_apic_timer_interrupt+0x92/0xd0 [78706.973082] </IRQ> [78706.973083] <TASK> [78706.973084] asm_sysvec_apic_timer_interrupt+0x1b/0x20 Does that mean something is not unexpected in the system? Thanks, Richard
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