[PATCH tip/core/rcu 0/4] CPU stall-warning changes for 3.8

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

Hello!

This patch series adds updates to RCU's CPU stall warning capability,
with patches as follows:

1.	For architectures without NMI-based stack-dump capability,
	have the current CPU remotely access the stalled CPU's stack
	to dump it.
2.	Include the number of the last grace period started and completed
	in RCU CPU stall warning messages.
3.	Dump the number of RCU callbacks on the system in order to help
	diagnose situations where spurious grace periods were started.
4.	Prototype patch to provide RCU CPU stall warning messages for
	Tiny RCU.

							Thanx, Paul

 b/include/linux/sched.h   |    2 
 b/kernel/rcu.h            |    7 +++
 b/kernel/rcupdate.c       |   52 +++++++++++++++++++++++++
 b/kernel/rcutiny.c        |    6 +-
 b/kernel/rcutiny_plugin.h |   56 +++++++++++++++++++++++++++
 b/kernel/rcutree.c        |   94 +++++++++++++++++++++-------------------------
 b/kernel/rcutree.h        |    5 --
 b/kernel/sched/core.c     |    6 ++
 b/lib/Kconfig.debug       |    2 
 9 files changed, 171 insertions(+), 59 deletions(-)