PM / sleep: trace events for suspend/resume
Adds trace events that give finer resolution into suspend/resume. These events are graphed in the timelines generated by the analyze_suspend.py script. They represent large areas of time consumed that are typical to suspend and resume. The event is triggered by calling the function "trace_suspend_resume" with three arguments: a string (the name of the event to be displayed in the timeline), an integer (case specific number, such as the power state or cpu number), and a boolean (where true is used to denote the start of the timeline event, and false to denote the end). The suspend_resume trace event reproduces the data that the machine_suspend trace event did, so the latter has been removed. Signed-off-by: Todd Brandt <todd.e.brandt@intel.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
parent
3eba148d75
commit
bb3632c610
|
@ -19,6 +19,7 @@
|
||||||
#include <linux/acpi.h>
|
#include <linux/acpi.h>
|
||||||
#include <linux/module.h>
|
#include <linux/module.h>
|
||||||
#include <asm/io.h>
|
#include <asm/io.h>
|
||||||
|
#include <trace/events/power.h>
|
||||||
|
|
||||||
#include "internal.h"
|
#include "internal.h"
|
||||||
#include "sleep.h"
|
#include "sleep.h"
|
||||||
|
@ -501,6 +502,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
|
||||||
|
|
||||||
ACPI_FLUSH_CPU_CACHE();
|
ACPI_FLUSH_CPU_CACHE();
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("acpi_suspend"), acpi_state, true);
|
||||||
switch (acpi_state) {
|
switch (acpi_state) {
|
||||||
case ACPI_STATE_S1:
|
case ACPI_STATE_S1:
|
||||||
barrier();
|
barrier();
|
||||||
|
@ -516,6 +518,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
|
||||||
pr_info(PREFIX "Low-level resume complete\n");
|
pr_info(PREFIX "Low-level resume complete\n");
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
|
trace_suspend_resume(TPS("acpi_suspend"), acpi_state, false);
|
||||||
|
|
||||||
/* This violates the spec but is required for bug compatibility. */
|
/* This violates the spec but is required for bug compatibility. */
|
||||||
acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
|
acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
|
||||||
|
|
|
@ -545,6 +545,7 @@ static void dpm_resume_noirq(pm_message_t state)
|
||||||
struct device *dev;
|
struct device *dev;
|
||||||
ktime_t starttime = ktime_get();
|
ktime_t starttime = ktime_get();
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("dpm_resume_noirq"), state.event, true);
|
||||||
mutex_lock(&dpm_list_mtx);
|
mutex_lock(&dpm_list_mtx);
|
||||||
pm_transition = state;
|
pm_transition = state;
|
||||||
|
|
||||||
|
@ -587,6 +588,7 @@ static void dpm_resume_noirq(pm_message_t state)
|
||||||
dpm_show_time(starttime, state, "noirq");
|
dpm_show_time(starttime, state, "noirq");
|
||||||
resume_device_irqs();
|
resume_device_irqs();
|
||||||
cpuidle_resume();
|
cpuidle_resume();
|
||||||
|
trace_suspend_resume(TPS("dpm_resume_noirq"), state.event, false);
|
||||||
}
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
|
@ -664,6 +666,7 @@ static void dpm_resume_early(pm_message_t state)
|
||||||
struct device *dev;
|
struct device *dev;
|
||||||
ktime_t starttime = ktime_get();
|
ktime_t starttime = ktime_get();
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("dpm_resume_early"), state.event, true);
|
||||||
mutex_lock(&dpm_list_mtx);
|
mutex_lock(&dpm_list_mtx);
|
||||||
pm_transition = state;
|
pm_transition = state;
|
||||||
|
|
||||||
|
@ -703,6 +706,7 @@ static void dpm_resume_early(pm_message_t state)
|
||||||
mutex_unlock(&dpm_list_mtx);
|
mutex_unlock(&dpm_list_mtx);
|
||||||
async_synchronize_full();
|
async_synchronize_full();
|
||||||
dpm_show_time(starttime, state, "early");
|
dpm_show_time(starttime, state, "early");
|
||||||
|
trace_suspend_resume(TPS("dpm_resume_early"), state.event, false);
|
||||||
}
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
|
@ -834,6 +838,7 @@ void dpm_resume(pm_message_t state)
|
||||||
struct device *dev;
|
struct device *dev;
|
||||||
ktime_t starttime = ktime_get();
|
ktime_t starttime = ktime_get();
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("dpm_resume"), state.event, true);
|
||||||
might_sleep();
|
might_sleep();
|
||||||
|
|
||||||
mutex_lock(&dpm_list_mtx);
|
mutex_lock(&dpm_list_mtx);
|
||||||
|
@ -875,6 +880,7 @@ void dpm_resume(pm_message_t state)
|
||||||
dpm_show_time(starttime, state, NULL);
|
dpm_show_time(starttime, state, NULL);
|
||||||
|
|
||||||
cpufreq_resume();
|
cpufreq_resume();
|
||||||
|
trace_suspend_resume(TPS("dpm_resume"), state.event, false);
|
||||||
}
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
|
@ -932,6 +938,7 @@ void dpm_complete(pm_message_t state)
|
||||||
{
|
{
|
||||||
struct list_head list;
|
struct list_head list;
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("dpm_complete"), state.event, true);
|
||||||
might_sleep();
|
might_sleep();
|
||||||
|
|
||||||
INIT_LIST_HEAD(&list);
|
INIT_LIST_HEAD(&list);
|
||||||
|
@ -951,6 +958,7 @@ void dpm_complete(pm_message_t state)
|
||||||
}
|
}
|
||||||
list_splice(&list, &dpm_list);
|
list_splice(&list, &dpm_list);
|
||||||
mutex_unlock(&dpm_list_mtx);
|
mutex_unlock(&dpm_list_mtx);
|
||||||
|
trace_suspend_resume(TPS("dpm_complete"), state.event, false);
|
||||||
}
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
|
@ -1086,6 +1094,7 @@ static int dpm_suspend_noirq(pm_message_t state)
|
||||||
ktime_t starttime = ktime_get();
|
ktime_t starttime = ktime_get();
|
||||||
int error = 0;
|
int error = 0;
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("dpm_suspend_noirq"), state.event, true);
|
||||||
cpuidle_pause();
|
cpuidle_pause();
|
||||||
suspend_device_irqs();
|
suspend_device_irqs();
|
||||||
mutex_lock(&dpm_list_mtx);
|
mutex_lock(&dpm_list_mtx);
|
||||||
|
@ -1126,6 +1135,7 @@ static int dpm_suspend_noirq(pm_message_t state)
|
||||||
} else {
|
} else {
|
||||||
dpm_show_time(starttime, state, "noirq");
|
dpm_show_time(starttime, state, "noirq");
|
||||||
}
|
}
|
||||||
|
trace_suspend_resume(TPS("dpm_suspend_noirq"), state.event, false);
|
||||||
return error;
|
return error;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1222,6 +1232,7 @@ static int dpm_suspend_late(pm_message_t state)
|
||||||
ktime_t starttime = ktime_get();
|
ktime_t starttime = ktime_get();
|
||||||
int error = 0;
|
int error = 0;
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("dpm_suspend_late"), state.event, true);
|
||||||
mutex_lock(&dpm_list_mtx);
|
mutex_lock(&dpm_list_mtx);
|
||||||
pm_transition = state;
|
pm_transition = state;
|
||||||
async_error = 0;
|
async_error = 0;
|
||||||
|
@ -1257,6 +1268,7 @@ static int dpm_suspend_late(pm_message_t state)
|
||||||
} else {
|
} else {
|
||||||
dpm_show_time(starttime, state, "late");
|
dpm_show_time(starttime, state, "late");
|
||||||
}
|
}
|
||||||
|
trace_suspend_resume(TPS("dpm_suspend_late"), state.event, false);
|
||||||
return error;
|
return error;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1461,6 +1473,7 @@ int dpm_suspend(pm_message_t state)
|
||||||
ktime_t starttime = ktime_get();
|
ktime_t starttime = ktime_get();
|
||||||
int error = 0;
|
int error = 0;
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("dpm_suspend"), state.event, true);
|
||||||
might_sleep();
|
might_sleep();
|
||||||
|
|
||||||
cpufreq_suspend();
|
cpufreq_suspend();
|
||||||
|
@ -1498,6 +1511,7 @@ int dpm_suspend(pm_message_t state)
|
||||||
dpm_save_failed_step(SUSPEND_SUSPEND);
|
dpm_save_failed_step(SUSPEND_SUSPEND);
|
||||||
} else
|
} else
|
||||||
dpm_show_time(starttime, state, NULL);
|
dpm_show_time(starttime, state, NULL);
|
||||||
|
trace_suspend_resume(TPS("dpm_suspend"), state.event, false);
|
||||||
return error;
|
return error;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -1582,6 +1596,7 @@ int dpm_prepare(pm_message_t state)
|
||||||
{
|
{
|
||||||
int error = 0;
|
int error = 0;
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("dpm_prepare"), state.event, true);
|
||||||
might_sleep();
|
might_sleep();
|
||||||
|
|
||||||
mutex_lock(&dpm_list_mtx);
|
mutex_lock(&dpm_list_mtx);
|
||||||
|
@ -1612,6 +1627,7 @@ int dpm_prepare(pm_message_t state)
|
||||||
put_device(dev);
|
put_device(dev);
|
||||||
}
|
}
|
||||||
mutex_unlock(&dpm_list_mtx);
|
mutex_unlock(&dpm_list_mtx);
|
||||||
|
trace_suspend_resume(TPS("dpm_prepare"), state.event, false);
|
||||||
return error;
|
return error;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
@ -10,6 +10,7 @@
|
||||||
#include <linux/mutex.h>
|
#include <linux/mutex.h>
|
||||||
#include <linux/module.h>
|
#include <linux/module.h>
|
||||||
#include <linux/interrupt.h>
|
#include <linux/interrupt.h>
|
||||||
|
#include <trace/events/power.h>
|
||||||
|
|
||||||
static LIST_HEAD(syscore_ops_list);
|
static LIST_HEAD(syscore_ops_list);
|
||||||
static DEFINE_MUTEX(syscore_ops_lock);
|
static DEFINE_MUTEX(syscore_ops_lock);
|
||||||
|
@ -49,6 +50,7 @@ int syscore_suspend(void)
|
||||||
struct syscore_ops *ops;
|
struct syscore_ops *ops;
|
||||||
int ret = 0;
|
int ret = 0;
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("syscore_suspend"), 0, true);
|
||||||
pr_debug("Checking wakeup interrupts\n");
|
pr_debug("Checking wakeup interrupts\n");
|
||||||
|
|
||||||
/* Return error code if there are any wakeup interrupts pending. */
|
/* Return error code if there are any wakeup interrupts pending. */
|
||||||
|
@ -70,6 +72,7 @@ int syscore_suspend(void)
|
||||||
"Interrupts enabled after %pF\n", ops->suspend);
|
"Interrupts enabled after %pF\n", ops->suspend);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("syscore_suspend"), 0, false);
|
||||||
return 0;
|
return 0;
|
||||||
|
|
||||||
err_out:
|
err_out:
|
||||||
|
@ -92,6 +95,7 @@ void syscore_resume(void)
|
||||||
{
|
{
|
||||||
struct syscore_ops *ops;
|
struct syscore_ops *ops;
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("syscore_resume"), 0, true);
|
||||||
WARN_ONCE(!irqs_disabled(),
|
WARN_ONCE(!irqs_disabled(),
|
||||||
"Interrupts enabled before system core resume.\n");
|
"Interrupts enabled before system core resume.\n");
|
||||||
|
|
||||||
|
@ -103,6 +107,7 @@ void syscore_resume(void)
|
||||||
WARN_ONCE(!irqs_disabled(),
|
WARN_ONCE(!irqs_disabled(),
|
||||||
"Interrupts enabled after %pF\n", ops->resume);
|
"Interrupts enabled after %pF\n", ops->resume);
|
||||||
}
|
}
|
||||||
|
trace_suspend_resume(TPS("syscore_resume"), 0, false);
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL_GPL(syscore_resume);
|
EXPORT_SYMBOL_GPL(syscore_resume);
|
||||||
#endif /* CONFIG_PM_SLEEP */
|
#endif /* CONFIG_PM_SLEEP */
|
||||||
|
|
|
@ -7,6 +7,9 @@
|
||||||
#include <linux/ktime.h>
|
#include <linux/ktime.h>
|
||||||
#include <linux/pm_qos.h>
|
#include <linux/pm_qos.h>
|
||||||
#include <linux/tracepoint.h>
|
#include <linux/tracepoint.h>
|
||||||
|
#include <linux/ftrace_event.h>
|
||||||
|
|
||||||
|
#define TPS(x) tracepoint_string(x)
|
||||||
|
|
||||||
DECLARE_EVENT_CLASS(cpu,
|
DECLARE_EVENT_CLASS(cpu,
|
||||||
|
|
||||||
|
@ -97,23 +100,6 @@ DEFINE_EVENT(cpu, cpu_frequency,
|
||||||
TP_ARGS(frequency, cpu_id)
|
TP_ARGS(frequency, cpu_id)
|
||||||
);
|
);
|
||||||
|
|
||||||
TRACE_EVENT(machine_suspend,
|
|
||||||
|
|
||||||
TP_PROTO(unsigned int state),
|
|
||||||
|
|
||||||
TP_ARGS(state),
|
|
||||||
|
|
||||||
TP_STRUCT__entry(
|
|
||||||
__field( u32, state )
|
|
||||||
),
|
|
||||||
|
|
||||||
TP_fast_assign(
|
|
||||||
__entry->state = state;
|
|
||||||
),
|
|
||||||
|
|
||||||
TP_printk("state=%lu", (unsigned long)__entry->state)
|
|
||||||
);
|
|
||||||
|
|
||||||
TRACE_EVENT(device_pm_report_time,
|
TRACE_EVENT(device_pm_report_time,
|
||||||
|
|
||||||
TP_PROTO(struct device *dev, const char *pm_ops, s64 ops_time,
|
TP_PROTO(struct device *dev, const char *pm_ops, s64 ops_time,
|
||||||
|
@ -151,6 +137,28 @@ TRACE_EVENT(device_pm_report_time,
|
||||||
__entry->ops_time, __entry->error)
|
__entry->ops_time, __entry->error)
|
||||||
);
|
);
|
||||||
|
|
||||||
|
TRACE_EVENT(suspend_resume,
|
||||||
|
|
||||||
|
TP_PROTO(const char *action, int val, bool start),
|
||||||
|
|
||||||
|
TP_ARGS(action, val, start),
|
||||||
|
|
||||||
|
TP_STRUCT__entry(
|
||||||
|
__field(const char *, action)
|
||||||
|
__field(int, val)
|
||||||
|
__field(bool, start)
|
||||||
|
),
|
||||||
|
|
||||||
|
TP_fast_assign(
|
||||||
|
__entry->action = action;
|
||||||
|
__entry->val = val;
|
||||||
|
__entry->start = start;
|
||||||
|
),
|
||||||
|
|
||||||
|
TP_printk("%s[%u] %s", __entry->action, (unsigned int)__entry->val,
|
||||||
|
(__entry->start)?"begin":"end")
|
||||||
|
);
|
||||||
|
|
||||||
DECLARE_EVENT_CLASS(wakeup_source,
|
DECLARE_EVENT_CLASS(wakeup_source,
|
||||||
|
|
||||||
TP_PROTO(const char *name, unsigned int state),
|
TP_PROTO(const char *name, unsigned int state),
|
||||||
|
|
|
@ -20,6 +20,7 @@
|
||||||
#include <linux/gfp.h>
|
#include <linux/gfp.h>
|
||||||
#include <linux/suspend.h>
|
#include <linux/suspend.h>
|
||||||
#include <linux/lockdep.h>
|
#include <linux/lockdep.h>
|
||||||
|
#include <trace/events/power.h>
|
||||||
|
|
||||||
#include "smpboot.h"
|
#include "smpboot.h"
|
||||||
|
|
||||||
|
@ -522,7 +523,9 @@ int disable_nonboot_cpus(void)
|
||||||
for_each_online_cpu(cpu) {
|
for_each_online_cpu(cpu) {
|
||||||
if (cpu == first_cpu)
|
if (cpu == first_cpu)
|
||||||
continue;
|
continue;
|
||||||
|
trace_suspend_resume(TPS("CPU_OFF"), cpu, true);
|
||||||
error = _cpu_down(cpu, 1);
|
error = _cpu_down(cpu, 1);
|
||||||
|
trace_suspend_resume(TPS("CPU_OFF"), cpu, false);
|
||||||
if (!error)
|
if (!error)
|
||||||
cpumask_set_cpu(cpu, frozen_cpus);
|
cpumask_set_cpu(cpu, frozen_cpus);
|
||||||
else {
|
else {
|
||||||
|
@ -566,7 +569,9 @@ void __ref enable_nonboot_cpus(void)
|
||||||
arch_enable_nonboot_cpus_begin();
|
arch_enable_nonboot_cpus_begin();
|
||||||
|
|
||||||
for_each_cpu(cpu, frozen_cpus) {
|
for_each_cpu(cpu, frozen_cpus) {
|
||||||
|
trace_suspend_resume(TPS("CPU_ON"), cpu, true);
|
||||||
error = _cpu_up(cpu, 1);
|
error = _cpu_up(cpu, 1);
|
||||||
|
trace_suspend_resume(TPS("CPU_ON"), cpu, false);
|
||||||
if (!error) {
|
if (!error) {
|
||||||
printk(KERN_INFO "CPU%d is up\n", cpu);
|
printk(KERN_INFO "CPU%d is up\n", cpu);
|
||||||
continue;
|
continue;
|
||||||
|
|
|
@ -28,6 +28,7 @@
|
||||||
#include <linux/syscore_ops.h>
|
#include <linux/syscore_ops.h>
|
||||||
#include <linux/ctype.h>
|
#include <linux/ctype.h>
|
||||||
#include <linux/genhd.h>
|
#include <linux/genhd.h>
|
||||||
|
#include <trace/events/power.h>
|
||||||
|
|
||||||
#include "power.h"
|
#include "power.h"
|
||||||
|
|
||||||
|
@ -292,7 +293,9 @@ static int create_image(int platform_mode)
|
||||||
|
|
||||||
in_suspend = 1;
|
in_suspend = 1;
|
||||||
save_processor_state();
|
save_processor_state();
|
||||||
|
trace_suspend_resume(TPS("machine_suspend"), PM_EVENT_HIBERNATE, true);
|
||||||
error = swsusp_arch_suspend();
|
error = swsusp_arch_suspend();
|
||||||
|
trace_suspend_resume(TPS("machine_suspend"), PM_EVENT_HIBERNATE, false);
|
||||||
if (error)
|
if (error)
|
||||||
printk(KERN_ERR "PM: Error %d creating hibernation image\n",
|
printk(KERN_ERR "PM: Error %d creating hibernation image\n",
|
||||||
error);
|
error);
|
||||||
|
|
|
@ -17,6 +17,7 @@
|
||||||
#include <linux/delay.h>
|
#include <linux/delay.h>
|
||||||
#include <linux/workqueue.h>
|
#include <linux/workqueue.h>
|
||||||
#include <linux/kmod.h>
|
#include <linux/kmod.h>
|
||||||
|
#include <trace/events/power.h>
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Timeout for stopping processes
|
* Timeout for stopping processes
|
||||||
|
@ -175,6 +176,7 @@ void thaw_processes(void)
|
||||||
struct task_struct *g, *p;
|
struct task_struct *g, *p;
|
||||||
struct task_struct *curr = current;
|
struct task_struct *curr = current;
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("thaw_processes"), 0, true);
|
||||||
if (pm_freezing)
|
if (pm_freezing)
|
||||||
atomic_dec(&system_freezing_cnt);
|
atomic_dec(&system_freezing_cnt);
|
||||||
pm_freezing = false;
|
pm_freezing = false;
|
||||||
|
@ -201,6 +203,7 @@ void thaw_processes(void)
|
||||||
|
|
||||||
schedule();
|
schedule();
|
||||||
printk("done.\n");
|
printk("done.\n");
|
||||||
|
trace_suspend_resume(TPS("thaw_processes"), 0, false);
|
||||||
}
|
}
|
||||||
|
|
||||||
void thaw_kernel_threads(void)
|
void thaw_kernel_threads(void)
|
||||||
|
|
|
@ -177,7 +177,9 @@ static int suspend_prepare(suspend_state_t state)
|
||||||
if (error)
|
if (error)
|
||||||
goto Finish;
|
goto Finish;
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("freeze_processes"), 0, true);
|
||||||
error = suspend_freeze_processes();
|
error = suspend_freeze_processes();
|
||||||
|
trace_suspend_resume(TPS("freeze_processes"), 0, false);
|
||||||
if (!error)
|
if (!error)
|
||||||
return 0;
|
return 0;
|
||||||
|
|
||||||
|
@ -240,7 +242,9 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
|
||||||
* all the devices are suspended.
|
* all the devices are suspended.
|
||||||
*/
|
*/
|
||||||
if (state == PM_SUSPEND_FREEZE) {
|
if (state == PM_SUSPEND_FREEZE) {
|
||||||
|
trace_suspend_resume(TPS("machine_suspend"), state, true);
|
||||||
freeze_enter();
|
freeze_enter();
|
||||||
|
trace_suspend_resume(TPS("machine_suspend"), state, false);
|
||||||
goto Platform_wake;
|
goto Platform_wake;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -256,7 +260,11 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
|
||||||
if (!error) {
|
if (!error) {
|
||||||
*wakeup = pm_wakeup_pending();
|
*wakeup = pm_wakeup_pending();
|
||||||
if (!(suspend_test(TEST_CORE) || *wakeup)) {
|
if (!(suspend_test(TEST_CORE) || *wakeup)) {
|
||||||
|
trace_suspend_resume(TPS("machine_suspend"),
|
||||||
|
state, true);
|
||||||
error = suspend_ops->enter(state);
|
error = suspend_ops->enter(state);
|
||||||
|
trace_suspend_resume(TPS("machine_suspend"),
|
||||||
|
state, false);
|
||||||
events_check_enabled = false;
|
events_check_enabled = false;
|
||||||
}
|
}
|
||||||
syscore_resume();
|
syscore_resume();
|
||||||
|
@ -294,7 +302,6 @@ int suspend_devices_and_enter(suspend_state_t state)
|
||||||
if (need_suspend_ops(state) && !suspend_ops)
|
if (need_suspend_ops(state) && !suspend_ops)
|
||||||
return -ENOSYS;
|
return -ENOSYS;
|
||||||
|
|
||||||
trace_machine_suspend(state);
|
|
||||||
if (need_suspend_ops(state) && suspend_ops->begin) {
|
if (need_suspend_ops(state) && suspend_ops->begin) {
|
||||||
error = suspend_ops->begin(state);
|
error = suspend_ops->begin(state);
|
||||||
if (error)
|
if (error)
|
||||||
|
@ -331,7 +338,6 @@ int suspend_devices_and_enter(suspend_state_t state)
|
||||||
else if (state == PM_SUSPEND_FREEZE && freeze_ops->end)
|
else if (state == PM_SUSPEND_FREEZE && freeze_ops->end)
|
||||||
freeze_ops->end();
|
freeze_ops->end();
|
||||||
|
|
||||||
trace_machine_suspend(PWR_EVENT_EXIT);
|
|
||||||
return error;
|
return error;
|
||||||
|
|
||||||
Recover_platform:
|
Recover_platform:
|
||||||
|
@ -365,6 +371,7 @@ static int enter_state(suspend_state_t state)
|
||||||
{
|
{
|
||||||
int error;
|
int error;
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("suspend_enter"), state, true);
|
||||||
if (state == PM_SUSPEND_FREEZE) {
|
if (state == PM_SUSPEND_FREEZE) {
|
||||||
#ifdef CONFIG_PM_DEBUG
|
#ifdef CONFIG_PM_DEBUG
|
||||||
if (pm_test_level != TEST_NONE && pm_test_level <= TEST_CPUS) {
|
if (pm_test_level != TEST_NONE && pm_test_level <= TEST_CPUS) {
|
||||||
|
@ -382,9 +389,11 @@ static int enter_state(suspend_state_t state)
|
||||||
if (state == PM_SUSPEND_FREEZE)
|
if (state == PM_SUSPEND_FREEZE)
|
||||||
freeze_begin();
|
freeze_begin();
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("sync_filesystems"), 0, true);
|
||||||
printk(KERN_INFO "PM: Syncing filesystems ... ");
|
printk(KERN_INFO "PM: Syncing filesystems ... ");
|
||||||
sys_sync();
|
sys_sync();
|
||||||
printk("done.\n");
|
printk("done.\n");
|
||||||
|
trace_suspend_resume(TPS("sync_filesystems"), 0, false);
|
||||||
|
|
||||||
pr_debug("PM: Preparing system for %s sleep\n", pm_states[state].label);
|
pr_debug("PM: Preparing system for %s sleep\n", pm_states[state].label);
|
||||||
error = suspend_prepare(state);
|
error = suspend_prepare(state);
|
||||||
|
@ -394,6 +403,7 @@ static int enter_state(suspend_state_t state)
|
||||||
if (suspend_test(TEST_FREEZER))
|
if (suspend_test(TEST_FREEZER))
|
||||||
goto Finish;
|
goto Finish;
|
||||||
|
|
||||||
|
trace_suspend_resume(TPS("suspend_enter"), state, false);
|
||||||
pr_debug("PM: Entering %s sleep\n", pm_states[state].label);
|
pr_debug("PM: Entering %s sleep\n", pm_states[state].label);
|
||||||
pm_restrict_gfp_mask();
|
pm_restrict_gfp_mask();
|
||||||
error = suspend_devices_and_enter(state);
|
error = suspend_devices_and_enter(state);
|
||||||
|
|
Loading…
Reference in a new issue