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Date: Thu, 28 Sep 2017 18:08:56 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: "Levin, Alexander (Sasha Levin)" <alexander.levin@verizon.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        Sasha Levin <levinsasha928@gmail.com>,
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Subject: Re: [PATCH v3 tip/core/rcu 40/40] rcu: Make non-preemptive schedule
 be Tasks RCU quiescent state
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On Thu, Sep 28, 2017 at 03:38:16PM +0000, Levin, Alexander (Sasha Levin) wrote:
> On Thu, Sep 28, 2017 at 05:30:55AM -0700, Paul E. McKenney wrote:

> >Hmmm...  kernel/rcu/tree_plugin.h:329 thinks that someone slept (as opposed
> >to was preempted) in an RCU read-side critical section.

Sasha, was this on one of those kernels that did a printk() from
scheduler context?