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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2015-07-18 11:30:59 +0530 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-07-21 01:12:01 +0200 |
| commit | 44152cb82d1ad6ae6f8b47c5437f6f1e65ca82c4 (patch) | |
| tree | d4a0d3058f60345d6ae6bee7fdcc881fe0df690b /drivers/cpufreq/cpufreq_governor.h | |
| parent | 42994af63cd1aafc9289035cf621e501b08732e9 (diff) | |
| download | linux-44152cb82d1ad6ae6f8b47c5437f6f1e65ca82c4.tar.bz2 | |
cpufreq: governor: Keep single copy of information common to policy->cpus
Some information is common to all CPUs belonging to a policy, but are
kept on per-cpu basis. Lets keep that in another structure common to all
policy->cpus. That will make updates/reads to that less complex and less
error prone.
The memory for cpu_common_dbs_info is allocated/freed at INIT/EXIT, so
that it we don't reallocate it for STOP/START sequence. It will be also
be used (in next patch) while the governor is stopped and so must not be
freed that early.
Reviewed-and-tested-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq_governor.h')
| -rw-r--r-- | drivers/cpufreq/cpufreq_governor.h | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h index a0f8eb79ee6d..8e4a25f0730c 100644 --- a/drivers/cpufreq/cpufreq_governor.h +++ b/drivers/cpufreq/cpufreq_governor.h @@ -128,6 +128,18 @@ static void *get_cpu_dbs_info_s(int cpu) \ * cs_*: Conservative governor */ +/* Common to all CPUs of a policy */ +struct cpu_common_dbs_info { + struct cpufreq_policy *policy; + /* + * percpu mutex that serializes governor limit change with gov_dbs_timer + * invocation. We do not want gov_dbs_timer to run when user is changing + * the governor or limits. + */ + struct mutex timer_mutex; + ktime_t time_stamp; +}; + /* Per cpu structures */ struct cpu_dbs_info { u64 prev_cpu_idle; @@ -140,15 +152,8 @@ struct cpu_dbs_info { * wake-up from idle. */ unsigned int prev_load; - struct cpufreq_policy *policy; struct delayed_work dwork; - /* - * percpu mutex that serializes governor limit change with gov_dbs_timer - * invocation. We do not want gov_dbs_timer to run when user is changing - * the governor or limits. - */ - struct mutex timer_mutex; - ktime_t time_stamp; + struct cpu_common_dbs_info *shared; }; struct od_cpu_dbs_info_s { @@ -264,7 +269,8 @@ static ssize_t show_sampling_rate_min_gov_pol \ extern struct mutex cpufreq_governor_lock; void dbs_check_cpu(struct dbs_data *dbs_data, int cpu); -bool need_load_eval(struct cpu_dbs_info *cdbs, unsigned int sampling_rate); +bool need_load_eval(struct cpu_common_dbs_info *shared, + unsigned int sampling_rate); int cpufreq_governor_dbs(struct cpufreq_policy *policy, struct common_dbs_data *cdata, unsigned int event); void gov_queue_work(struct dbs_data *dbs_data, struct cpufreq_policy *policy, |