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Subject[PATCH tip/core/rcu 0/16] rcu: v2 patches queued for 2.6.35
Hello!

RFC preview of RCU patches queued for 2.6.35, take 2. Take 1 is at
http://lkml.org/lkml/2010/4/5/134. Changes to old patches noted in
"[]", new patches flagged with "New".

1. substitute set_need_resched for sending resched IPIs
This reduces OS jitter.

2. make dead code really dead. [Updated commit message as suggested
by Mathieu Desnoyers.]
3. move some code from macro to function
Cleanups from Lai Jiangshan.

4. ignore offline CPUs in last non dyntick idle CPU check
Fix to my CONFIG_RCU_FAST_NO_HZ code to handle offline and
non-existent CPUs, also from Lai Jiangshan.

5. fix bogus CONFIG_PROVE_LOCKING in comments to reality
6. fix now bogus rcu_scheduler_active comments
Comment fixups.

7. shrink rcutiny by making synchronize_rcu_bh be inline
Shrink TINY_RCU some more.

8. rename rcutiny rcu_ctrlblk to rcu_sched_ctrlblk
First step towards TINY_PREEMPTIBLE_RCU.

9. refactor RCU's context switch handling
Reduce the number of needless softirqs.

10. slim down rcutiny by removing rcu_scheduler_active and friends
More shrinkage for TINY_RCU

11. New: enable CPU_STALL_VERBOSE by default. It will have been in one
release, so time to enable it.

12. New: disable CPU stall warnings upon panic

13. New: print boot-time console messages if RCU configs out of ordinary

14. New: improve RCU CPU stall-warning messages

15. New: permit discontiguous cpu_possible_mask CPU numbering

16. New: v2: reduce the number of spurious RCU_SOFTIRQ invocations

Thanx, Paul


b/Documentation/RCU/trace.txt | 35 ++++++------
b/include/linux/rcupdate.h | 15 ++---
b/include/linux/rcutiny.h | 12 +++-
b/include/linux/rcutree.h | 2
b/include/linux/srcu.h | 4 -
b/kernel/rcupdate.c | 19 ------
b/kernel/rcutiny.c | 9 ---
b/kernel/rcutiny_plugin.h | 39 +++++++++++++
b/kernel/rcutree.c | 10 +++
b/kernel/rcutree.h | 1
b/kernel/rcutree_plugin.h | 2
b/kernel/rcutree_trace.c | 4 +
b/kernel/sched.c | 2
b/kernel/softirq.c | 2
b/lib/Kconfig.debug | 2
include/linux/rcupdate.h | 12 +---
include/linux/rcutiny.h | 17 +++++
include/linux/rcutree.h | 4 +
kernel/rcutiny.c | 20 ++++--
kernel/rcutree.c | 121 +++++++++++++++++++++++++++++-------------
kernel/rcutree.h | 1
kernel/rcutree_plugin.h | 55 +++++++++++++++++--
22 files changed, 275 insertions(+), 113 deletions(-)


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