kernel_optimize_test/drivers/base
Alex Shi 37efa4b41f CPU / PM: expose pm_qos_resume_latency for CPUs
The cpu-dma PM QoS constraint impacts all the cpus in the system. There
is no way to let the user to choose a PM QoS constraint per cpu.

The following patch exposes to the userspace a per cpu based sysfs file
in order to let the userspace to change the value of the PM QoS latency
constraint.

This change is inoperative in its form and the cpuidle governors have to
take into account the per cpu latency constraint in addition to the
global cpu-dma latency constraint in order to operate properly.

BTW
The pm_qos_resume_latency usage defined in
Documentation/ABI/testing/sysfs-devices-power
The /sys/devices/.../power/pm_qos_resume_latency_us attribute
contains the PM QoS resume latency limit for the given device,
which is the maximum allowed time it can take to resume the
device, after it has been suspended at run time, from a resume
request to the moment the device will be ready to process I/O,
in microseconds.  If it is equal to 0, however, this means that
the PM QoS resume latency may be arbitrary.

Signed-off-by: Alex Shi <alex.shi@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-01-30 11:05:29 +01:00
..
power PM / domains: Fix 'may be used uninitialized' build warning 2016-12-31 21:52:07 +01:00
regmap regmap: cache: Remove unused 'blksize' variable 2016-11-25 13:01:36 +00:00
test driver core: test_async: fix up typo found by 0-day 2016-11-29 22:06:42 +01:00
attribute_container.c
base.h Revert "driver core: Add deferred_probe attribute to devices in sysfs" 2017-01-14 14:09:03 +01:00
bus.c
cacheinfo.c Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-22 09:25:45 -08:00
class.c driver core: class: add class_groups support 2016-11-29 21:12:12 +01:00
component.c
container.c
core.c Revert "driver core: Add deferred_probe attribute to devices in sysfs" 2017-01-14 14:09:03 +01:00
cpu.c CPU / PM: expose pm_qos_resume_latency for CPUs 2017-01-30 11:05:29 +01:00
dd.c Revert "driver core: Add deferred_probe attribute to devices in sysfs" 2017-01-14 14:09:03 +01:00
devcoredump.c driver core: devcoredump: convert to use class_groups 2016-11-29 21:12:12 +01:00
devres.c devres: add devm_alloc_percpu() 2016-11-15 22:34:25 -05:00
devtmpfs.c
dma-coherent.c drivers: dma-coherent: Move spinlock in dma_alloc_from_coherent() 2016-09-28 17:53:16 +02:00
dma-contiguous.c
dma-mapping.c drivers: base: dma-mapping: Fix typo in dmam_alloc_non_coherent comments 2016-11-30 13:04:53 +01:00
driver.c
firmware_class.c firmware: Correct handling of fw_state_wait() return value 2016-12-08 21:05:54 +01:00
firmware.c
hypervisor.c
init.c
isa.c
Kconfig Driver core patches for 4.10-rc1 2016-12-13 11:42:18 -08:00
Makefile driver-core: add test module for asynchronous probing 2016-11-10 17:28:16 +01:00
map.c
memory.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
module.c
node.c
pinctrl.c driver: base: pinctrl: return error from pinctrl_bind_pins() 2016-09-13 23:02:59 +02:00
platform-msi.c genirq/msi: Add cpumask allocation to alloc_msi_entry 2016-09-14 22:11:08 +02:00
platform.c driver-core: platform: Catch errors from calls to irq_get_irq_data 2016-09-27 12:30:37 +02:00
property.c
soc.c base: soc: Check for NULL SoC device attributes 2016-11-10 10:10:33 +01:00
syscore.c
topology.c drivers base/topology: Convert to hotplug state machine 2016-11-09 23:45:29 +01:00
transport_class.c