[PATCH tip/core/rcu 0/10] Grace-period-related changes for 3.13

["Paul E. McKenney" <paulmck@linux.vnet.ibm.com>]

Hello!

This series contains updates to RCU's grace-period processsing, mostly
to improve debuggability of RCU itself.

1.	Add consistency checks to the grace-period initialization logic.

2.	Prevent spurious-wakeup DoS attack on rcu_gp_kthread.

3.	Flag lockless accesses to ->gp_flags with ACCESS_ONCE().

4-6.	Add event tracing to various aspects of RCU grace period processing.

7.	Distinguish between NOCB and non-NOCB rcu_callback trace events.

8.	Add event tracing to track rcu_nocb_kthread() sleeping and awakening.

9.	Avoid sparse warnings in rcu_nocb_wake trace event.

10.	Make RCU use resched_cpu() instead of the current set_need_resched(),
	courtesy of Peter Zijlstra.

							Thanx, Paul


 b/include/trace/events/rcu.h |   80 +++++++++++++++++++++++++++++++++++--------
 b/kernel/rcutiny.c           |    2 -
 b/kernel/rcutree.c           |   71 ++++++++++++++++++++++++++++++++------
 b/kernel/rcutree_plugin.h    |   35 ++++++++++++++++--
 b/kernel/sched/core.c        |   10 +----
 5 files changed, 160 insertions(+), 38 deletions(-)