Re: [PATCH] [RFC] rt: kernel/sched/core: fix kthread_park() pending too long when CPU un-plugged

[Peter Zijlstra]

On Thu, Jan 07, 2021 at 05:18:41PM +0800, Ran Wang wrote:
> +
> +			if (IS_ENABLED(CONFIG_PREEMPT_RT) &&
> +			    !strncmp(p->comm, "ksoftirqd/", 10))
> +				schedule_hrtimeout(&to,
> +					HRTIMER_MODE_REL | HRTIMER_MODE_HARD);
> +			else
> +				schedule_hrtimeout(&to, HRTIMER_MODE_REL);

This is horrific, why did you not self-censor and spare me the mental
anguish of having to formulate a CoC compliant response?

It also violates coding style, but given the total lack of any sense,
that seems like a minor detail.

Why can't we use HRTIMER_MODE_HARD unconditionally?