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Subject[PATCH tip/core/rcu 0/7] Preview of fourth set of RCU changes for 3.3
Hello!

This patchset adds to the earlier sets:

https://lkml.org/lkml/2011/11/2/363
https://lkml.org/lkml/2011/11/15/302
https://lkml.org/lkml/2011/11/28/588

This fourth set adds more infrastructure for Frederic's user-mode nohz
work, additional improvements to RCU_FAST_NO_HZ, and a few bug fixes.
The patches are as follows:

1,2. More support for user-mode nohz (courtesy of Frederic Weisbecker).
3. Ignore RCU callback batch limits if the CPU is otherwise idle.
This allows a CPU to more quickly clear a backlog of callbacks,
and thus more quickly enter dyntick-idle mode.
4. Adaptive dyntick-entry approach that more efficiently handles
the various possible grace-period begin/end scenarios.
5. Remove a redundant variable declaration.
6. Allow rcutorture to avoid attempting to offline unhotpluggable CPUs.
7. Fix RCU-lockdep splats involving RCU read-side critical sections
that partially overlap irq-disable code sections (courtesy of
Yong Zhang).

For a testing-only version of this patchset from git, please see the
following subject-to-rebase branch, based on 3.2-rc3:

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

Thanx, Paul

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

b/drivers/base/cpu.c | 12 ++++++++
b/include/linux/cpu.h | 1
b/kernel/rcutorture.c | 4 +-
b/kernel/rcutree.c | 18 +++++--------
b/kernel/rcutree.h | 1
b/kernel/rcutree_plugin.h | 14 ++++++++++
kernel/rcutree.c | 12 ++++----
kernel/rcutree_plugin.h | 62 ++++++++++++++++++++++++++++++++++++----------
8 files changed, 92 insertions(+), 32 deletions(-)



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