linux-kernel - Re: 4.19-rc1: ./include/linux/rcupdate.h:631 rcu_read

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Message-ID: <20180905090702.339d94b2@gandalf.local.home>
Date:   Wed, 5 Sep 2018 09:07:02 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     Borislav Petkov <bp@...en8.de>, x86-ml <x86@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        lkml <linux-kernel@...r.kernel.org>, joel@...lfernandes.org
Subject: Re: 4.19-rc1: ./include/linux/rcupdate.h:631 rcu_read_lock() used
 illegally while idle!

On Wed, 5 Sep 2018 05:59:41 -0700
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> wrote:

> On Wed, Sep 05, 2018 at 10:22:54AM +0200, Borislav Petkov wrote:
> > On Tue, Sep 04, 2018 at 01:53:21PM -0700, Paul E. McKenney wrote:  
> > > I must defer to Borislav on this one.  Assuming it has the desired
> > > effect, I am good with it.  
> > 
> > It did survive a bunch of reboots (the WARN would fire after boot
> > finishes, normally) so I guess we can run with it and see how it works
> > out in the next couple of weeks.
> > 
> > Thanks guys!  
> 
> Woo-hoo!!!  Thank you for testing this!

OK, I'll make this into an official patch and put it into my test
suite. I should be able to push it out to Linus tomorrow.

-- Steve