More power management updates for 4.20-rc1
- Fix build regression in the intel_pstate driver that doesn't build without CONFIG_ACPI after recent changes (Dominik Brodowski). - One of the heuristics in the menu cpuidle governor is based on a function returning 0 most of the time, so drop it and clean up the scheduler code related to it (Daniel Lezcano). - Prevent the arm_big_little cpufreq driver from being used on ARM64 which is not suitable for it and drop the arm_big_little_dt driver that is not used any more (Sudeep Holla). - Prevent the hung task watchdog from triggering during resume from system-wide sleep states by disabling it before freezing tasks and enabling it again after they have been thawed (Vitaly Kuznetsov). -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCAAGBQJb2BJ7AAoJEILEb/54YlRx/kwP/iD7tUUZ6mT84OI0FTbEj8A/ fM+uHrwy25PmqyWGGtbHpaWU9OxVxUReSicsBCt+2LZmX3sFYpbSb243mv3pmxqb A0kLflG4lWCKJNIfa/a3OMDTUw26mxSTCidE3jJXkd8HkWrzeAWvMair+UCuzMf3 A4Omu0IkNL8C0MKtUOb3PlUk3dnLYMxuairNhozBPhi+P+0tLW9/9XvgPJBVhnbZ CKn/aFsDoc08tAfxC8N32cgKwE7nbeIgTJTBFyu2lQmInsd4TTuoM50vSC5i+x88 AmBOoH9IX0fhXJ6hgm+VMW8+x9S+H7jAVy/3C2xoUBeCclzlxX6eUCtjV5YNZqqn 1nXQfGeAwgzX6Tyu6HjM7vjbfObk59ZwpmDRPJEUEhLDEBMS+iDStlp9zmKTedNm G4iSTzS6qJCNPtx4y5wkLp/FvzTofIuWqVFJSJC4+EoVKkbbw9xwaY+JKXUt1Uwx j+U6EtRhzL/kVX0nq+iQXXeANxCFNzI56Ov5O7mxjF1m/hDE/Gb2QEeIb6nRZC2A H3I2so2J3h1yTgadpGFFvJWaqfHkgcBTsm06tSgHVb86quiTANJIQ9mqfFyOzDDJ KaZ82MROt7UuCMI6X9n+oIBDZWLHmADge6RdHCD1wB+zrUmusCtNEHUZACXd0mPf s8MUK4bWVhViVXGS5bMP =/bnR -----END PGP SIGNATURE----- Merge tag 'pm-4.20-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull more power management updates from Rafael Wysocki: "These remove a questionable heuristic from the menu cpuidle governor, fix a recent build regression in the intel_pstate driver, clean up ARM big-Little support in cpufreq and fix up hung task watchdog's interaction with system-wide power management transitions. Specifics: - Fix build regression in the intel_pstate driver that doesn't build without CONFIG_ACPI after recent changes (Dominik Brodowski). - One of the heuristics in the menu cpuidle governor is based on a function returning 0 most of the time, so drop it and clean up the scheduler code related to it (Daniel Lezcano). - Prevent the arm_big_little cpufreq driver from being used on ARM64 which is not suitable for it and drop the arm_big_little_dt driver that is not used any more (Sudeep Holla). - Prevent the hung task watchdog from triggering during resume from system-wide sleep states by disabling it before freezing tasks and enabling it again after they have been thawed (Vitaly Kuznetsov)" * tag 'pm-4.20-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: kernel: hung_task.c: disable on suspend cpufreq: remove unused arm_big_little_dt driver cpufreq: drop ARM_BIG_LITTLE_CPUFREQ support for ARM64 cpufreq: intel_pstate: Fix compilation for !CONFIG_ACPI cpuidle: menu: Remove get_loadavg() from the performance multiplier sched: Factor out nr_iowait and nr_iowait_cpu
This commit is contained in:
Коммит
6ef746769e
|
@ -3823,7 +3823,6 @@ W: http://www.arm.com/products/processors/technologies/biglittleprocessing.php
|
|||
S: Maintained
|
||||
F: drivers/cpufreq/arm_big_little.h
|
||||
F: drivers/cpufreq/arm_big_little.c
|
||||
F: drivers/cpufreq/arm_big_little_dt.c
|
||||
|
||||
CPU POWER MONITORING SUBSYSTEM
|
||||
M: Thomas Renninger <trenn@suse.com>
|
||||
|
|
|
@ -28,20 +28,13 @@ config ARM_ARMADA_37XX_CPUFREQ
|
|||
# big LITTLE core layer and glue drivers
|
||||
config ARM_BIG_LITTLE_CPUFREQ
|
||||
tristate "Generic ARM big LITTLE CPUfreq driver"
|
||||
depends on (ARM_CPU_TOPOLOGY || ARM64) && HAVE_CLK
|
||||
depends on ARM_CPU_TOPOLOGY && HAVE_CLK
|
||||
# if CPU_THERMAL is on and THERMAL=m, ARM_BIT_LITTLE_CPUFREQ cannot be =y
|
||||
depends on !CPU_THERMAL || THERMAL
|
||||
select PM_OPP
|
||||
help
|
||||
This enables the Generic CPUfreq driver for ARM big.LITTLE platforms.
|
||||
|
||||
config ARM_DT_BL_CPUFREQ
|
||||
tristate "Generic probing via DT for ARM big LITTLE CPUfreq driver"
|
||||
depends on ARM_BIG_LITTLE_CPUFREQ && OF
|
||||
help
|
||||
This enables probing via DT for Generic CPUfreq driver for ARM
|
||||
big.LITTLE platform. This gets frequency tables from DT.
|
||||
|
||||
config ARM_SCPI_CPUFREQ
|
||||
tristate "SCPI based CPUfreq driver"
|
||||
depends on ARM_SCPI_PROTOCOL && COMMON_CLK_SCPI
|
||||
|
|
|
@ -48,9 +48,6 @@ obj-$(CONFIG_X86_SFI_CPUFREQ) += sfi-cpufreq.o
|
|||
##################################################################################
|
||||
# ARM SoC drivers
|
||||
obj-$(CONFIG_ARM_BIG_LITTLE_CPUFREQ) += arm_big_little.o
|
||||
# big LITTLE per platform glues. Keep DT_BL_CPUFREQ as the last entry in all big
|
||||
# LITTLE drivers, so that it is probed last.
|
||||
obj-$(CONFIG_ARM_DT_BL_CPUFREQ) += arm_big_little_dt.o
|
||||
|
||||
obj-$(CONFIG_ARM_ARMADA_37XX_CPUFREQ) += armada-37xx-cpufreq.o
|
||||
obj-$(CONFIG_ARM_BRCMSTB_AVS_CPUFREQ) += brcmstb-avs-cpufreq.o
|
||||
|
|
|
@ -1,100 +0,0 @@
|
|||
/*
|
||||
* Generic big.LITTLE CPUFreq Interface driver
|
||||
*
|
||||
* It provides necessary ops to arm_big_little cpufreq driver and gets
|
||||
* Frequency information from Device Tree. Freq table in DT must be in KHz.
|
||||
*
|
||||
* Copyright (C) 2013 Linaro.
|
||||
* Viresh Kumar <viresh.kumar@linaro.org>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
||||
* kind, whether express or implied; without even the implied warranty
|
||||
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
||||
|
||||
#include <linux/cpufreq.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/export.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/pm_opp.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/types.h>
|
||||
#include "arm_big_little.h"
|
||||
|
||||
/* get cpu node with valid operating-points */
|
||||
static struct device_node *get_cpu_node_with_valid_op(int cpu)
|
||||
{
|
||||
struct device_node *np = of_cpu_device_node_get(cpu);
|
||||
|
||||
if (!of_get_property(np, "operating-points", NULL)) {
|
||||
of_node_put(np);
|
||||
np = NULL;
|
||||
}
|
||||
|
||||
return np;
|
||||
}
|
||||
|
||||
static int dt_get_transition_latency(struct device *cpu_dev)
|
||||
{
|
||||
struct device_node *np;
|
||||
u32 transition_latency = CPUFREQ_ETERNAL;
|
||||
|
||||
np = of_node_get(cpu_dev->of_node);
|
||||
if (!np) {
|
||||
pr_info("Failed to find cpu node. Use CPUFREQ_ETERNAL transition latency\n");
|
||||
return CPUFREQ_ETERNAL;
|
||||
}
|
||||
|
||||
of_property_read_u32(np, "clock-latency", &transition_latency);
|
||||
of_node_put(np);
|
||||
|
||||
pr_debug("%s: clock-latency: %d\n", __func__, transition_latency);
|
||||
return transition_latency;
|
||||
}
|
||||
|
||||
static const struct cpufreq_arm_bL_ops dt_bL_ops = {
|
||||
.name = "dt-bl",
|
||||
.get_transition_latency = dt_get_transition_latency,
|
||||
.init_opp_table = dev_pm_opp_of_cpumask_add_table,
|
||||
.free_opp_table = dev_pm_opp_of_cpumask_remove_table,
|
||||
};
|
||||
|
||||
static int generic_bL_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device_node *np;
|
||||
|
||||
np = get_cpu_node_with_valid_op(0);
|
||||
if (!np)
|
||||
return -ENODEV;
|
||||
|
||||
of_node_put(np);
|
||||
return bL_cpufreq_register(&dt_bL_ops);
|
||||
}
|
||||
|
||||
static int generic_bL_remove(struct platform_device *pdev)
|
||||
{
|
||||
bL_cpufreq_unregister(&dt_bL_ops);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver generic_bL_platdrv = {
|
||||
.driver = {
|
||||
.name = "arm-bL-cpufreq-dt",
|
||||
},
|
||||
.probe = generic_bL_probe,
|
||||
.remove = generic_bL_remove,
|
||||
};
|
||||
module_platform_driver(generic_bL_platdrv);
|
||||
|
||||
MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
|
||||
MODULE_DESCRIPTION("Generic ARM big LITTLE cpufreq driver via DT");
|
||||
MODULE_LICENSE("GPL v2");
|
|
@ -386,16 +386,11 @@ static int intel_pstate_get_cppc_guranteed(int cpu)
|
|||
return cppc_perf.guaranteed_perf;
|
||||
}
|
||||
|
||||
#else
|
||||
#else /* CONFIG_ACPI_CPPC_LIB */
|
||||
static void intel_pstate_set_itmt_prio(int cpu)
|
||||
{
|
||||
}
|
||||
|
||||
static int intel_pstate_get_cppc_guranteed(int cpu)
|
||||
{
|
||||
return -ENOTSUPP;
|
||||
}
|
||||
#endif
|
||||
#endif /* CONFIG_ACPI_CPPC_LIB */
|
||||
|
||||
static void intel_pstate_init_acpi_perf_limits(struct cpufreq_policy *policy)
|
||||
{
|
||||
|
@ -477,7 +472,7 @@ static void intel_pstate_exit_perf_limits(struct cpufreq_policy *policy)
|
|||
|
||||
acpi_processor_unregister_performance(policy->cpu);
|
||||
}
|
||||
#else
|
||||
#else /* CONFIG_ACPI */
|
||||
static inline void intel_pstate_init_acpi_perf_limits(struct cpufreq_policy *policy)
|
||||
{
|
||||
}
|
||||
|
@ -490,7 +485,14 @@ static inline bool intel_pstate_acpi_pm_profile_server(void)
|
|||
{
|
||||
return false;
|
||||
}
|
||||
#endif
|
||||
#endif /* CONFIG_ACPI */
|
||||
|
||||
#ifndef CONFIG_ACPI_CPPC_LIB
|
||||
static int intel_pstate_get_cppc_guranteed(int cpu)
|
||||
{
|
||||
return -ENOTSUPP;
|
||||
}
|
||||
#endif /* CONFIG_ACPI_CPPC_LIB */
|
||||
|
||||
static inline void update_turbo_state(void)
|
||||
{
|
||||
|
|
|
@ -130,11 +130,6 @@ struct menu_device {
|
|||
int interval_ptr;
|
||||
};
|
||||
|
||||
static inline int get_loadavg(unsigned long load)
|
||||
{
|
||||
return LOAD_INT(load) * 10 + LOAD_FRAC(load) / 10;
|
||||
}
|
||||
|
||||
static inline int which_bucket(unsigned int duration, unsigned long nr_iowaiters)
|
||||
{
|
||||
int bucket = 0;
|
||||
|
@ -168,18 +163,10 @@ static inline int which_bucket(unsigned int duration, unsigned long nr_iowaiters
|
|||
* to be, the higher this multiplier, and thus the higher
|
||||
* the barrier to go to an expensive C state.
|
||||
*/
|
||||
static inline int performance_multiplier(unsigned long nr_iowaiters, unsigned long load)
|
||||
static inline int performance_multiplier(unsigned long nr_iowaiters)
|
||||
{
|
||||
int mult = 1;
|
||||
|
||||
/* for higher loadavg, we are more reluctant */
|
||||
|
||||
mult += 2 * get_loadavg(load);
|
||||
|
||||
/* for IO wait tasks (per cpu!) we add 5x each */
|
||||
mult += 10 * nr_iowaiters;
|
||||
|
||||
return mult;
|
||||
/* for IO wait tasks (per cpu!) we add 10x each */
|
||||
return 1 + 10 * nr_iowaiters;
|
||||
}
|
||||
|
||||
static DEFINE_PER_CPU(struct menu_device, menu_devices);
|
||||
|
@ -297,7 +284,7 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
|
|||
int idx;
|
||||
unsigned int interactivity_req;
|
||||
unsigned int predicted_us;
|
||||
unsigned long nr_iowaiters, cpu_load;
|
||||
unsigned long nr_iowaiters;
|
||||
ktime_t delta_next;
|
||||
|
||||
if (data->needs_update) {
|
||||
|
@ -308,7 +295,7 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
|
|||
/* determine the expected residency time, round up */
|
||||
data->next_timer_us = ktime_to_us(tick_nohz_get_sleep_length(&delta_next));
|
||||
|
||||
get_iowait_load(&nr_iowaiters, &cpu_load);
|
||||
nr_iowaiters = nr_iowait_cpu(dev->cpu);
|
||||
data->bucket = which_bucket(data->next_timer_us, nr_iowaiters);
|
||||
|
||||
if (unlikely(drv->state_count <= 1 || latency_req == 0) ||
|
||||
|
@ -352,7 +339,7 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
|
|||
* Use the performance multiplier and the user-configurable
|
||||
* latency_req to determine the maximum exit latency.
|
||||
*/
|
||||
interactivity_req = predicted_us / performance_multiplier(nr_iowaiters, cpu_load);
|
||||
interactivity_req = predicted_us / performance_multiplier(nr_iowaiters);
|
||||
if (latency_req > interactivity_req)
|
||||
latency_req = interactivity_req;
|
||||
}
|
||||
|
|
|
@ -20,7 +20,6 @@ extern unsigned long nr_running(void);
|
|||
extern bool single_task_running(void);
|
||||
extern unsigned long nr_iowait(void);
|
||||
extern unsigned long nr_iowait_cpu(int cpu);
|
||||
extern void get_iowait_load(unsigned long *nr_waiters, unsigned long *load);
|
||||
|
||||
static inline int sched_info_on(void)
|
||||
{
|
||||
|
|
|
@ -15,6 +15,7 @@
|
|||
#include <linux/lockdep.h>
|
||||
#include <linux/export.h>
|
||||
#include <linux/sysctl.h>
|
||||
#include <linux/suspend.h>
|
||||
#include <linux/utsname.h>
|
||||
#include <linux/sched/signal.h>
|
||||
#include <linux/sched/debug.h>
|
||||
|
@ -242,6 +243,28 @@ void reset_hung_task_detector(void)
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(reset_hung_task_detector);
|
||||
|
||||
static bool hung_detector_suspended;
|
||||
|
||||
static int hungtask_pm_notify(struct notifier_block *self,
|
||||
unsigned long action, void *hcpu)
|
||||
{
|
||||
switch (action) {
|
||||
case PM_SUSPEND_PREPARE:
|
||||
case PM_HIBERNATION_PREPARE:
|
||||
case PM_RESTORE_PREPARE:
|
||||
hung_detector_suspended = true;
|
||||
break;
|
||||
case PM_POST_SUSPEND:
|
||||
case PM_POST_HIBERNATION:
|
||||
case PM_POST_RESTORE:
|
||||
hung_detector_suspended = false;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return NOTIFY_OK;
|
||||
}
|
||||
|
||||
/*
|
||||
* kthread which checks for tasks stuck in D state
|
||||
*/
|
||||
|
@ -261,7 +284,8 @@ static int watchdog(void *dummy)
|
|||
interval = min_t(unsigned long, interval, timeout);
|
||||
t = hung_timeout_jiffies(hung_last_checked, interval);
|
||||
if (t <= 0) {
|
||||
if (!atomic_xchg(&reset_hung_task, 0))
|
||||
if (!atomic_xchg(&reset_hung_task, 0) &&
|
||||
!hung_detector_suspended)
|
||||
check_hung_uninterruptible_tasks(timeout);
|
||||
hung_last_checked = jiffies;
|
||||
continue;
|
||||
|
@ -275,6 +299,10 @@ static int watchdog(void *dummy)
|
|||
static int __init hung_task_init(void)
|
||||
{
|
||||
atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
|
||||
|
||||
/* Disable hung task detector on suspend */
|
||||
pm_notifier(hungtask_pm_notify, 0);
|
||||
|
||||
watchdog_task = kthread_run(watchdog, NULL, "khungtaskd");
|
||||
|
||||
return 0;
|
||||
|
|
|
@ -2880,6 +2880,18 @@ unsigned long long nr_context_switches(void)
|
|||
return sum;
|
||||
}
|
||||
|
||||
/*
|
||||
* Consumers of these two interfaces, like for example the cpuidle menu
|
||||
* governor, are using nonsensical data. Preferring shallow idle state selection
|
||||
* for a CPU that has IO-wait which might not even end up running the task when
|
||||
* it does become runnable.
|
||||
*/
|
||||
|
||||
unsigned long nr_iowait_cpu(int cpu)
|
||||
{
|
||||
return atomic_read(&cpu_rq(cpu)->nr_iowait);
|
||||
}
|
||||
|
||||
/*
|
||||
* IO-wait accounting, and how its mostly bollocks (on SMP).
|
||||
*
|
||||
|
@ -2915,31 +2927,11 @@ unsigned long nr_iowait(void)
|
|||
unsigned long i, sum = 0;
|
||||
|
||||
for_each_possible_cpu(i)
|
||||
sum += atomic_read(&cpu_rq(i)->nr_iowait);
|
||||
sum += nr_iowait_cpu(i);
|
||||
|
||||
return sum;
|
||||
}
|
||||
|
||||
/*
|
||||
* Consumers of these two interfaces, like for example the cpuidle menu
|
||||
* governor, are using nonsensical data. Preferring shallow idle state selection
|
||||
* for a CPU that has IO-wait which might not even end up running the task when
|
||||
* it does become runnable.
|
||||
*/
|
||||
|
||||
unsigned long nr_iowait_cpu(int cpu)
|
||||
{
|
||||
struct rq *this = cpu_rq(cpu);
|
||||
return atomic_read(&this->nr_iowait);
|
||||
}
|
||||
|
||||
void get_iowait_load(unsigned long *nr_waiters, unsigned long *load)
|
||||
{
|
||||
struct rq *rq = this_rq();
|
||||
*nr_waiters = atomic_read(&rq->nr_iowait);
|
||||
*load = rq->load.weight;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
|
||||
/*
|
||||
|
|
Загрузка…
Ссылка в новой задаче