From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Josh Triplett <josh@joshtriplett.org>,
linux-kernel@vger.kernel.org, mingo@kernel.org,
jiangshanlai@gmail.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org,
dhowells@redhat.com, edumazet@google.com, dvhart@linux.intel.com,
fweisbec@gmail.com, bobby.prani@gmail.com
Subject: Re: [PATCH tip/core/rcu 0/13] percpu-rwsem patches for 4.4
Date: Tue, 6 Oct 2015 12:33:11 -0700 [thread overview]
Message-ID: <20151006193311.GS3910@linux.vnet.ibm.com> (raw)
In-Reply-To: <20151006185055.GA15844@redhat.com>
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@joshtriplett.org>
>
> 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.
Thanx, Paul
next prev parent reply other threads:[~2015-10-06 19:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-06 16:45 [PATCH tip/core/rcu 0/13] percpu-rwsem patches for 4.4 Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 01/13] locktorture: Support rtmutex torturing Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 02/13] locking/percpu-rwsem: Export symbols for locktorture Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 03/13] locktorture: Add torture tests for percpu_rwsem Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 04/13] torture: Consolidate cond_resched_rcu_qs() into stutter_wait() Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 05/13] rcu: Create rcu_sync infrastructure Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 06/13] rcu_sync: Simplify rcu_sync using new rcu_sync_ops structure Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 07/13] rcu_sync: Add CONFIG_PROVE_RCU checks Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 08/13] rcu_sync: Introduce rcu_sync_dtor() Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 09/13] locking/percpu-rwsem: Make percpu_free_rwsem() after kzalloc() safe Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 10/13] locking/percpu-rwsem: Make use of the rcu_sync infrastructure Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 11/13] locking/percpu-rwsem: Fix the comments outdated by rcu_sync Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 12/13] locking/percpu-rwsem: Clean up the lockdep annotations in percpu_down_read() Paul E. McKenney
2015-10-06 16:45 ` [PATCH tip/core/rcu 13/13] rcu_sync: Cleanup the CONFIG_PROVE_RCU checks Paul E. McKenney
2015-10-06 17:42 ` [PATCH tip/core/rcu 0/13] percpu-rwsem patches for 4.4 Josh Triplett
2015-10-06 18:50 ` Oleg Nesterov
2015-10-06 19:33 ` Paul E. McKenney [this message]
2015-10-06 20:36 ` Josh Triplett
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