Messages in this thread | | | Date | Thu, 4 Apr 2013 21:57:19 +0530 | Subject | Re: [PATCH linux-next v8] cpufreq: convert the cpufreq_driver to use the rcu | From | Viresh Kumar <> |
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On 4 April 2013 20:23, Nathan Zimmer <nzimmer@sgi.com> wrote: > We eventually would like to remove the rwlock cpufreq_driver_lock or convert > it back to a spinlock and protect the read sections with RCU. The first step in > that is moving the cpufreq_driver to use the rcu. > I don't see an easy wasy to protect the cpufreq_cpu_data structure with the > RCU, so I am leaving it with the rwlock for now since under certain configs > __cpufreq_cpu_get is hot spot with 256+ cores. > > v5: Go a different way and split up the lock and use the rcu > v6: use bools instead of checking function pointers > covert the cpufreq_data_lock to a rwlock > v7: Rebase to use the already accepted half > v8: Correct have_governor_per_policy > Reviewed location of rcu_read_(un)lock in several spots
Sorry for long delay or too many versions of this patch :)
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
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