Commit ab28a067 authored by Zqiang's avatar Zqiang Committed by Tejun Heo
Browse files

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.

Fixes: f4a6c506 ("sched_ext: Always bounce scx_disable() through irq_work")
Signed-off-by: default avatarZqiang <qiang.zhang@linux.dev>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 1f91d0d5

kernel/sched/ext.c

+1 −1
Original line number Diff line number Diff line
@@ -6589,7 +6589,7 @@ static struct scx_sched *scx_alloc_and_add_sched(struct sched_ext_ops *ops, 


	sch->slice_dfl = SCX_SLICE_DFL;

	atomic_set(&sch->exit_kind, SCX_EXIT_NONE);

	init_irq_work(&sch->disable_irq_work, scx_disable_irq_workfn);

	sch->disable_irq_work = IRQ_WORK_INIT_HARD(scx_disable_irq_workfn);

	kthread_init_work(&sch->disable_work, scx_disable_workfn);

	timer_setup(&sch->bypass_lb_timer, scx_bypass_lb_timerfn, 0);