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