sched_ext: Use IRQ_WORK_INIT_HARD() to initialize sch->disable_irq_work

For built with PREEMPT_RT kernels, the scx_disable_irq_workfn() is called from per-cpu irq_work kthreads context, this means that when call the scx_dump_state() in the scx_disable_irq_workfn() to output current->comm/pid, it always output current irq_work kthread's comm/pid. this commit therefore use the IRQ_WORK_INIT_HARD() to initialize sch->disable_irq_work to make scx_disable_irq_workfn() is called from hardirq context.

Zqiang committed 6 months ago

Commit ab28a061 parent 1f91d0d1 file · +1 −1Browse files

Showing the changes to kernel (1 of 1 file). Show all

Unified · Split

kernel/sched/ext.c+1−1

@@ -6589,7 +6589,7 @@ static struct scx_sched scx_alloc_and_add_sched(struct sched_ext_ops ops, · 6588 unmodified lines
6589		6589
6590	sch->slice_dfl = SCX_SLICE_DFL;	6590	sch->slice_dfl = SCX_SLICE_DFL;
6591	atomic_set(&sch->exit_kind, SCX_EXIT_NONE);	6591	atomic_set(&sch->exit_kind, SCX_EXIT_NONE);
6592	init_irq_work(&sch->disable_irq_work, scx_disable_irq_workfn);	6592	sch->disable_irq_work = IRQ_WORK_INIT_HARD(scx_disable_irq_workfn);
6593	kthread_init_work(&sch->disable_work, scx_disable_workfn);	6593	kthread_init_work(&sch->disable_work, scx_disable_workfn);
6594	timer_setup(&sch->bypass_lb_timer, scx_bypass_lb_timerfn, 0);	6594	timer_setup(&sch->bypass_lb_timer, scx_bypass_lb_timerfn, 0);
6595		6595