linux-kernel - [PATCH tip/core/rcu 0/2] rcu: further grace-period processing cleanups

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Date:	Thu, 12 Nov 2009 22:34:39 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...e.hu, 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: [PATCH tip/core/rcu 0/2] rcu: further grace-period processing
	cleanups

This patch set provides a couple of additional grace-period-processing
cleanups:

1.	Propagate ->completed through the rcu_node hierarchy
	when RCU goes idle to prevent an additional needless
	grace period from being started.

2.	Make force_quiescent_state() take a snapshot of ->gpnum-1
	rather than ->completed for consistency with rcu_sched_qs()
	and friends.
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