linux-kernel - Re: [PATCH tip/core/rcu 0/2] RCU force_quiescent

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Message-ID: <20091029141018.GA6897@linux.vnet.ibm.com>
Date:	Thu, 29 Oct 2009 07:10:18 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, josh@...htriplett.org,
	dvhltc@...ibm.com, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu,
	dhowells@...hat.com
Subject: Re: [PATCH tip/core/rcu 0/2] RCU force_quiescent_state() fix and
	dyntick cleanup

On Thu, Oct 29, 2009 at 10:05:37AM +0100, Ingo Molnar wrote:
> 
> * Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:
> 
> > This patch series contains a cleanup and a fix:
> > 
> > o	Code cleanup from Lai Jiangshan that makes the calls to
> > 	rcu_irq_enter() and rcu_irq_exit() more obviously correct.
> > 	The previous code worked because rcu_irq_exit() is always
> > 	an empty function if !NO_HZ.
> 
> Can go via tip:core/rcu, agreed?

Agreed.

> > o	Fix a low-probability race in the TREE_RCU infrastructure
> > 	that can be triggered by extremely long grace periods.
> 
> Should go via tip:core/urgent as it's a fix for .32, agreed?

Also agreed.

							Thanx, Paul
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