[PATCH 0/2] cpufreq: cpufreq_driver_lock is hot on large systems

[Nathan Zimmer]

I am noticing the cpufreq_driver_lock is quite hot.
On an idle 512 system perf shows me most of the system time is spent on this
lock.  This is quite signifigant as top shows 5% of time in system time.
My solution was to first convert the lock to a rwlock and then to the rcu.


Nathan Zimmer (2):
  cpufreq: Convert the cpufreq_driver_lock to a rwlock
  cpufreq: Convert the cpufreq_driver_lock to use the rcu

 drivers/cpufreq/cpufreq.c | 139 ++++++++++++++++++++++++++--------------------
 1 file changed, 79 insertions(+), 60 deletions(-)

-- 
1.8.0.1

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