RE: "rcu: React to callback overload by aggressively seeking quiescent states" hangs on boot

[Dexuan Cui]

> From: Paul E. McKenney <paulmck@xxxxxxxxxx>
> Sent: Sunday, December 15, 2019 12:20 PM
> 
> This is consistent with what I saw in Qian Cai's report, FYI.  So I
> am very interested in learning whether the first patch in my reply [1]
> helps you.
> 							Thanx, Paul

Hi Paul, yes, your first patch (the below) can fix the hang issue:

commit e8d6182b015bdd8221164477f4ab1c307bd2fbe9
Author: Paul E. McKenney <paulmck@xxxxxxxxxx>
Date:   Sun Dec 15 10:59:06 2019 -0800

    squash! rcu: React to callback overload by aggressively seeking quiescent states

Thanks,
-- Dexuan