Re: [PATCH tip/core/rcu 0/13] percpu-rwsem patches for 4.4

[Josh Triplett]

On Tue, Oct 06, 2015 at 12:33:11PM -0700, Paul E. McKenney wrote:
> On Tue, Oct 06, 2015 at 08:50:56PM +0200, Oleg Nesterov wrote:
> > On 10/06, Josh Triplett wrote:
> > >
> > > For all 13:
> > > Reviewed-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
> > 
> > Thanks!
> > 
> > > Regarding the rcu_sync infrastructure: odd that an atomic read
> > > on the reader proves ligher weight than
> > > rcu_read_lock()/rcu_read_unlock().
> > 
> > Cough... Could you spell? ;) I am just curious and I can't understand
> > what do you mean.
> 
> I would guess that Josh is thinking of CONFIG_PREEMPT=n and that you
> worked with CONFIG_PREEMPT=y.  But it would be good to get this fully
> understood.

Right.

- Josh Triplett
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