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SubjectRe: [PATCH v2] EXP rcu: Move expedited grace period (GP) work to RT kthread_worker
On Fri, 8 Apr 2022 08:58:34 -0700
"Paul E. McKenney" <paulmck@kernel.org> wrote:

> > I do not see why PREEMPT_RT is special here. Why was it singled out?
>
> Because I didn't see the point of doing kthread_create_worker() to create
> a pair of kthread_worker structuress that were never going to be used
> in PREEMPT_RT kernels.
>
> Or are PREEMPT_RT kernels no longer booting with rcupdate.rcu_normal?
> Last I knew, they all did this to avoid IPI latencies from expedited
> grace periods. Has this changed?

Honestly, I don't know. But I guess I can go and find out ;-)

-- Steve

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