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sched: Add Kconfig option DEFAULT_USE_ENERGY_AWARE to set ENERGY_AWARE feature flag

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The ENERGY_AWARE sched feature flag cannot be set unless
CONFIG_SCHED_DEBUG is enabled.

So this patch allows the flag to default to true at build time
if the config is set.

Change-Id: I8835a571fdb7a8f8ee6a54af1e11a69f3b5ce8e6
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
John Stultz 2016-09-20 18:42:22 -07:00 • committed by Dmitry Shmidt
parent df23243771
commit 53c63d3b4f
2 changed files with 14 additions and 0 deletions
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10
init/Kconfig
View file

@ -1290,6 +1290,16 @@ config SCHED_TUNE
If unsure, say N.
config DEFAULT_USE_ENERGY_AWARE
bool "Default to enabling the Energy Aware Scheduler feature"
default n
help
This option defaults the ENERGY_AWARE scheduling feature to true,
as without SCHED_DEBUG set this feature can't be enabled or disabled
via sysctl.
Say N if unsure.
config SYSFS_DEPRECATED
bool "Enable deprecated sysfs features to support old userspace tools"
depends on SYSFS

4
kernel/sched/features.h
View file

@ -73,4 +73,8 @@ SCHED_FEAT(ATTACH_AGE_LOAD, true)
* Energy aware scheduling. Use platform energy model to guide scheduling
* decisions optimizing for energy efficiency.
*/
#ifdef CONFIG_DEFAULT_USE_ENERGY_AWARE
SCHED_FEAT(ENERGY_AWARE, true)
#else
SCHED_FEAT(ENERGY_AWARE, false)
#endif