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Subject[PATCH v2 linux-next 0/2] cpufreq: cpufreq_driver_lock is hot on large systems
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 significant 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.

v2: Rebase to linux-next

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 | 150 +++++++++++++++++++++++++---------------------
1 file changed, 83 insertions(+), 67 deletions(-)


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