linux-kernel - Re: [tip: core/rcu] rcu: Enable tick for nohz

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Message-ID: <20200125200854.GA8673@paulmck-ThinkPad-P72>
Date:   Sat, 25 Jan 2020 12:08:54 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     linux-kernel@...r.kernel.org, linux-tip-commits@...r.kernel.org,
        x86 <x86@...nel.org>
Subject: Re: [tip: core/rcu] rcu: Enable tick for nohz_full CPUs slow to
 provide expedited QS

On Sat, Jan 25, 2020 at 11:48:46AM -0800, Paul E. McKenney wrote:
> On Sat, Jan 25, 2020 at 06:54:42PM +0100, Borislav Petkov wrote:
> > On Sat, Jan 25, 2020 at 08:10:50AM -0800, Paul E. McKenney wrote:

[ . . . ]

> > > If that works, I will re-introduce the warning with proper protection
> > > for the merge window following this coming one.
> > 
> > My big box is at your service if you need stuff tested later.
> 
> Thank you in advance!  I just might take you up on that!

And I do have an alleged fix on branch dev of the -rcu tree:

	git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git

I am just now starting testing, so the probability of failure is
decidedly non-zero.  ;-)

							Thanx, Paul