linux-kernel - Re: [PATCH] RCU read sched

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Message-ID: <20080930131055.GB6716@linux.vnet.ibm.com>
Date:	Tue, 30 Sep 2008 06:10:55 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH] RCU read sched

On Tue, Sep 30, 2008 at 12:08:30PM +0200, Ingo Molnar wrote:
> 
> * Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca> wrote:
> 
> > (probably already in -tip)
> > 
> > Add rcu_read_lock_sched() and rcu_read_unlock_sched() to rcupdate.h to match the
> > recently added write-side call_rcu_sched() and rcu_barrier_sched(). They also
> > match the no-so-recently-added synchronize_sched().
> > 
> > It will help following matching use of the update/read lock primitives. Those
> > new read lock will replace preempt_disable()/enable() used in pair with
> > RCU-classic synchronization.
> > 
> > Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
> > Acked-by: Peter Zijlstra <peterz@...radead.org>
> > CC: Paul E McKenney <paulmck@...ux.vnet.ibm.com>
> 
> Paul, does this API extension look good to you?

Yep!!!

> i'll apply it to tip/core/rcu if yes.

Please do!

							Thanx, Paul
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