Re: need_heavy_qs flag for PREEMPT=y kernels

[Frederic Weisbecker <frederic@kernel.org>]

On Thu, Aug 15, 2019 at 01:31:07PM -0700, Paul E. McKenney wrote:
> On Thu, Aug 15, 2019 at 04:04:32PM -0400, Joel Fernandes wrote:
> > diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
> > index be9707f68024..e697c7a2ce67 100644
> > --- a/kernel/time/tick-sched.c
> > +++ b/kernel/time/tick-sched.c
> > @@ -198,6 +198,10 @@ static bool check_tick_dependency(atomic_t *dep)
> >  		return true;
> >  	}
> >  
> > +	if (val & TICK_DEP_MASK_CLOCK_RCU) {
> > +		return true;
> > +	}
> > +
> >  	return false;
> >  }
> 
> That one is not in my tree, either.  Frederic, should I add this to
> your patch?  For that matter, may I add your Signed-off-by as well?
> Your original is in my -rcu tree at:
> 
> 0cb41806c799 ("EXP nohz: Add TICK_DEP_BIT_RCU")

Of course, thanks!

> 
> I am testing Joel's suggested addition now.
> 
> 							Thanx, Paul