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SubjectRe: [PATCH 0/2] cpufreq: cpufreq_driver_lock is hot on large systems
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On Monday, February 04, 2013 04:45:11 PM Nathan Zimmer wrote:
> 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(-)

I like these changes.

Viresh, anyone, any comments?

Rafael


--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.


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