Re: [PATCH v2 16/35] preempt,rcu: warn on PREEMPT_RCU=n, preempt=full

Peter Zijlstra
2024-06-06T11:53:33Z

On Thu, May 30, 2024 at 04:20:26PM -0700, Paul E. McKenney wrote:

> My selfish motivation here is to avoid testing this combination unless
> and until someone actually has a good use for it.

That doesn't make sense, the whole LAZY thing is fundamentally identical
to FULL, except it sometimes delays the preemption a wee bit. But all
the preemption scenarios from FULL are possible.

As such, it makes far more sense to only test FULL.