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Date:	Tue, 6 Oct 2015 12:33:11 -0700
From:	"Paul E. McKenney" <>
To:	Oleg Nesterov <>
Cc:	Josh Triplett <>,,,,,,,,,,,,,,
Subject: Re: [PATCH tip/core/rcu 0/13] percpu-rwsem patches for 4.4

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 <>
> 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

							Thanx, Paul

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