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Subject[PATCH tip/core/rcu 0/7] RCU_FAST_NO_HZ changes for 3.6
Hello!

This patch series provides more adjustments to the (relatively) new
large-system-safe implementation for RCU_FAST_NO_HZ:

1. Remove RCU_FAST_NO_HZ dependency on stop_machine() nature of
CPU hotplug.
2. Make RCU_FAST_NO_HZ tracing distinguish between short and
long idle intervals.
3. Move RCU_FAST_NO_HZ per-CPU state variables to the rcu_dynticks
per-CPU structure.
4. Precompute RCU_FAST_NO_HZ timer offsets so that the timers
will actually be paid attention to. This fixes the slow-boot
problem that hit a few people.
5. Convert ftrace_dump() calls in idle entry and idle exit from
DUMP_ALL to DUMP_ORIG.
6. Fix erroneous TINY_PREEMPT_RCU assumption that rcu_preempt_needs_cpu()
is a quiescent state (it is not).
7. Round RCU_FAST_NO_HZ lazy timeout to nearest second to conserve
power on systems with synchronized scheduler-clock interrupts.

I am considering pushing #1-#4 into 3.5 for the slow-boot regression.
If you object, please let me know.

Thanx, Paul


b/include/linux/rcupdate.h | 2
b/include/linux/rcutiny.h | 6 +
b/include/linux/rcutree.h | 2
b/include/trace/events/rcu.h | 1
b/kernel/rcutiny_plugin.h | 2
b/kernel/rcutree.c | 2
b/kernel/rcutree.h | 14 +++
b/kernel/rcutree_plugin.h | 8 +-
b/kernel/time/tick-sched.c | 7 +
kernel/rcutree.c | 4 -
kernel/rcutree_plugin.h | 167 ++++++++++++++++++++++---------------------
11 files changed, 124 insertions(+), 91 deletions(-)



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