xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cpufreq: Add mechanism for registering utilization update callbacks

Browse Source 
Introduce a mechanism by which parts of the cpufreq subsystem
("setpolicy" drivers or the core) can register callbacks to be
executed from cpufreq_update_util() which is invoked by the
scheduler's update_load_avg() on CPU utilization changes.

This allows the "setpolicy" drivers to dispense with their timers
and do all of the computations they need and frequency/voltage
adjustments in the update_load_avg() code path, among other things.

The update_load_avg() changes were suggested by Peter Zijlstra.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Rafael J. Wysocki
2016-02-15 20:20:42 +01:00
parent de1df26b7c
commit 34e2c555f3
6 changed files with 113 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
kernel/sched/sched.h
View File

@@ -9,6 +9,7 @@
#include <linux/irq_work.h>
#include <linux/tick.h>
#include <linux/slab.h>
#include <linux/cpufreq.h>
#include "cpupri.h"
#include "cpudeadline.h"