[PATCH RFC tip/core/rcu 0/4] Updates to RCU_FAST_NO_HZ

[Paul E. McKenney]

Hello!

This series covers enhancements to RCU_FAST_NO_HZ intended for v3.4-rc2.
The individual commits are as follows:

1.	Add tracing to rcu_cleanup_after_idle().
2.	Switch from hrtimer to normal timers to reduce overhead.
3.	Upgrade RCU_FAST_NO_HZ state machine to better account for
	brief pauses out of idle, which can happen due to power-management
	actions, Steven Rostedt's new RCU-idle-capable tracing macros,
	or my RCU_NONIDLE() macro.
4.	Use add_timer_on() to avoid timer migration.

							Thanx, Paul


 b/include/trace/events/rcu.h |    1 
 b/kernel/rcutree.c           |    2 
 b/kernel/rcutree.h           |    1 
 b/kernel/rcutree_plugin.h    |    1 
 kernel/rcutree_plugin.h      |  112 ++++++++++++++++++++++++++++---------------
 5 files changed, 80 insertions(+), 37 deletions(-)

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