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

Paul E. McKenney
2012-04-23T16:16:52Z

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(-)