From 9be4fd2c7723a3057b0b39676fe4c8d5fd7118a4 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 10 Feb 2016 16:53:50 +0100 Subject: cpufreq: governor: Replace timers with utilization update callbacks Instead of using a per-CPU deferrable timer for queuing up governor work items, register a utilization update callback that will be invoked from the scheduler on utilization changes. The sampling rate is still the same as what was used for the deferrable timers and the added irq_work overhead should be offset by the eliminated timers overhead, so in theory the functional impact of this patch should not be significant. Signed-off-by: Rafael J. Wysocki Acked-by: Viresh Kumar Tested-by: Gautham R. Shenoy --- drivers/cpufreq/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/cpufreq/Kconfig') diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index 659879a56dba..dcb972a38fbc 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -3,6 +3,7 @@ menu "CPU Frequency scaling" config CPU_FREQ bool "CPU Frequency scaling" select SRCU + select IRQ_WORK help CPU Frequency scaling allows you to change the clock speed of CPUs on the fly. This is a nice method to save power, because -- cgit v1.2.3