Re: [tip: core/rcu] rcu: Enable tick for nohz_full CPUs slow to provide expedited QS

From: Paul E. McKenney
Date: Sat Jan 25 2020 - 15:09:03 EST


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