[PATCH tip/core/rcu 0/9] Preview of additional RCU changes for 3.3

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

Hello!

This patchset is in addition to the set previously posted (see
https://lkml.org/lkml/2011/11/2/363).  This new set permits the
reworked RCU_FAST_NO_HZ code to be used from TREE_PREEMPT_RCU,
allows rcutorture to shut down the system after a fixed time
period (useful for KVM-based testing), adds an API to
replace the "->pid == 0" discussed in response to the earlier
patch set, and applies this API where applicable.  The patches are
as follows:

1.	Update the RCU_FAST_NO_HZ config definition to allow it to
	be used in TREE_PREEMPT_RCU builds, since that is now legal.
2.	Add a module parameter that permit rcutorture to shut down the
	system cleanly after the test has run for the specified time.
3.	Add a module parameter to allow rcutorture start running
	as soon as it is initialized.
4.	Add is_idle_task() API to replace open-coded tests of ->pid
	against zero.
5-9.	Apply the new is_idle_task() API where it makes sense.

For a testing-only version of this patchset from git, please see the
following subject-to-rebase branch:

git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/dev

							Thanx, Paul

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

 b/Documentation/RCU/torture.txt  |    5 +++
 b/arch/sparc/kernel/setup_32.c   |    2 -
 b/arch/tile/mm/fault.c           |    4 +-
 b/include/linux/sched.h          |    1 
 b/init/Kconfig                   |   10 +++---
 b/kernel/debug/kdb/kdb_support.c |    2 -
 b/kernel/events/core.c           |    2 -
 b/kernel/rcutiny.c               |    4 +-
 b/kernel/rcutorture.c            |   62 ++++++++++++++++++++++++++++++++++++---
 b/kernel/rcutree.c               |    4 +-
 b/kernel/sched.c                 |    9 +++++
 kernel/rcutorture.c              |    2 +
 12 files changed, 89 insertions(+), 18 deletions(-)