[PATCH tip/core/rcu 0/2] Expedited grace-period updates

[Paul E. McKenney]

Hello!

This series contains updates and fixes to expedited grace-period handling:

1.	Consolidate nearly identical code from synchronize_rcu_expedited()
	and synchronize_sched_expedited().

2.	Drive expedited grace periods from workqueue rather than user task.

3.	Stop disabling expedited RCU CPU stall warnings, enabled by
	#2 above.

4.	Make expedited RCU CPU stall warnings respond
	to the panic_on_rcu_stall sysctl setting and the
	rcupdate.rcu_cpu_stall_suppress kernel boot parameter.

5.	Exclude RCU-offline CPUs from expedited grace periods based on
	RCU's internal state.

6.	Use RCU's online-CPU state for expedited-grace-period IPI retry.

							Thanx, Paul

------------------------------------------------------------------------

 tree.h       |    1 
 tree_exp.h   |  134 ++++++++++++++++++++++++++++++++++++-----------------------
 tree_trace.c |    7 +--
 3 files changed, 87 insertions(+), 55 deletions(-)