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    Subject[PATCH RFC tip/core/rcu 0/4] Updates to RCU_FAST_NO_HZ
    Hello!

    This series covers enhancements to RCU_FAST_NO_HZ intended for v3.4-rc2.
    The individual commits are as follows:

    1. Add tracing to rcu_cleanup_after_idle().
    2. Switch from hrtimer to normal timers to reduce overhead.
    3. Upgrade RCU_FAST_NO_HZ state machine to better account for
    brief pauses out of idle, which can happen due to power-management
    actions, Steven Rostedt's new RCU-idle-capable tracing macros,
    or my RCU_NONIDLE() macro.
    4. Use add_timer_on() to avoid timer migration.

    Thanx, Paul


    b/include/trace/events/rcu.h | 1
    b/kernel/rcutree.c | 2
    b/kernel/rcutree.h | 1
    b/kernel/rcutree_plugin.h | 1
    kernel/rcutree_plugin.h | 112 ++++++++++++++++++++++++++++---------------
    5 files changed, 80 insertions(+), 37 deletions(-)



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