On 06/17/2012 02:06 AM, Rafael J. Wysocki wrote: > On Saturday, June 16, 2012, Rafael J. Wysocki wrote: >> On Friday, June 15, 2012, Greg KH wrote: >>> On Fri, Jun 15, 2012 at 12:00:20PM +0200, Rafael J. Wysocki wrote: >>>> On Friday, June 15, 2012, Greg KH wrote: >>>>> On Wed, May 23, 2012 at 09:45:32AM -0700, Sameer Nanda wrote: >>>>>> Added a new knob called /sys/power/pm_print_times. Setting it to 1 >>>>>> enables printing of time taken by devices to suspend and resume. >>>>>> Setting it to 0 disables this printing (unless overridden by >>>>>> initcall_debug kernel command line option). >>>>>> >>>>>> Signed-off-by: Sameer Nanda <snanda@xxxxxxxxxxxx> >>>>>> cc: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> >>>>>> cc: Rafael J. Wysocki <rjw@xxxxxxx> >>>>>> cc: Steven Rostedt <rostedt@xxxxxxxxxxx> >>>>>> --- >>>>>> Documentation/ABI/testing/sysfs-power | 13 ++++++++++++ >>>>>> drivers/base/power/main.c | 4 +- >>>>>> drivers/base/power/power.h | 11 ++++++++++ >>>>>> kernel/power/main.c | 34 +++++++++++++++++++++++++++++++++ >>>>>> 4 files changed, 60 insertions(+), 2 deletions(-) >>>>> >>>>> This patch fails against the linux-next tree, care to fix it up so that >>>>> I can apply it? >>>> >>>> I'd prefer it to go through my tree if you don't mind. >>> >>> Not at all, feel free to put: >>> >>> Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> >>> >>> When it shows up again. >> >> I've just used the original one, it only needed a documentation merge conflict >> fixed. >> >> Queued up for 3.6. > > I propose the following patch on top of this one. The details are in the > changelog. > > If anyone has any objections, please let me know. > > Thanks, > Rafael > > --- > From: Rafael J. Wysocki <rjw@xxxxxxx> > Subject: PM / Sleep: Separate printing suspend times from initcall_debug > > Change the behavior of the newly introduced > /sys/power/pm_print_times attribute so that its initial value > depends on initcall_debug, but setting it to 0 will cause device > suspend/resume times not to be printed, even if initcall_debug has > been set. This way, the people who use initcall_debug for reasons > other than PM debugging will be able to switch the suspend/resume > times printing off, if need be. > > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx> Regards, Srivatsa S. Bhat > --- > drivers/base/power/main.c | 4 ++-- > drivers/base/power/power.h | 11 ----------- > include/linux/suspend.h | 4 ++++ > kernel/power/main.c | 14 +++++++++++--- > 4 files changed, 17 insertions(+), 16 deletions(-) > > Index: linux/kernel/power/main.c > =================================================================== > --- linux.orig/kernel/power/main.c > +++ linux/kernel/power/main.c > @@ -139,7 +139,7 @@ power_attr(pm_test); > * show() returns whether printing of suspend and resume times is enabled. > * store() accepts 0 or 1. 0 disables printing and 1 enables it. > */ > -int pm_print_times_enabled; > +bool pm_print_times_enabled; > > static ssize_t pm_print_times_show(struct kobject *kobj, > struct kobj_attribute *attr, char *buf) > @@ -159,12 +159,19 @@ static ssize_t pm_print_times_store(stru > if (val > 1) > return -EINVAL; > > - pm_print_times_enabled = val; > + pm_print_times_enabled = !!val; > return n; > } > > +static inline void pm_print_times_init(void) > +{ > + pm_print_times_enabled = !!initcall_debug; > +} > + > power_attr(pm_print_times); > -#endif /* CONFIG_PM_DEBUG */ > +#else /* !CONFIG_PM_DEBUG */ > +static inline void pm_print_times_init(void) {} > +#endif /* !CONFIG_PM_DEBUG */ > > #ifdef CONFIG_DEBUG_FS > static char *suspend_step_name(enum suspend_stat_step step) > @@ -599,6 +606,7 @@ static int __init pm_init(void) > error = sysfs_create_group(power_kobj, &attr_group); > if (error) > return error; > + pm_print_times_init(); > return pm_autosleep_init(); > } > > Index: linux/include/linux/suspend.h > =================================================================== > --- linux.orig/include/linux/suspend.h > +++ linux/include/linux/suspend.h > @@ -387,6 +387,8 @@ static inline void unlock_system_sleep(v > mutex_unlock(&pm_mutex); > } > > +extern bool pm_print_times_enabled; > + > #else /* !CONFIG_PM_SLEEP */ > > static inline int register_pm_notifier(struct notifier_block *nb) > @@ -406,6 +408,8 @@ static inline bool pm_wakeup_pending(voi > static inline void lock_system_sleep(void) {} > static inline void unlock_system_sleep(void) {} > > +#define pm_print_times_enabled (false) > + > #endif /* !CONFIG_PM_SLEEP */ > > #ifdef CONFIG_PM_AUTOSLEEP > Index: linux/drivers/base/power/main.c > =================================================================== > --- linux.orig/drivers/base/power/main.c > +++ linux/drivers/base/power/main.c > @@ -166,7 +166,7 @@ static ktime_t initcall_debug_start(stru > { > ktime_t calltime = ktime_set(0, 0); > > - if (pm_print_times) { > + if (pm_print_times_enabled) { > pr_info("calling %s+ @ %i, parent: %s\n", > dev_name(dev), task_pid_nr(current), > dev->parent ? dev_name(dev->parent) : "none"); > @@ -181,7 +181,7 @@ static void initcall_debug_report(struct > { > ktime_t delta, rettime; > > - if (pm_print_times) { > + if (pm_print_times_enabled) { > rettime = ktime_get(); > delta = ktime_sub(rettime, calltime); > pr_info("call %s+ returned %d after %Ld usecs\n", dev_name(dev), > Index: linux/drivers/base/power/power.h > =================================================================== > --- linux.orig/drivers/base/power/power.h > +++ linux/drivers/base/power/power.h > @@ -85,14 +85,3 @@ static inline int pm_qos_sysfs_add(struc > static inline void pm_qos_sysfs_remove(struct device *dev) {} > > #endif > - > -#ifdef CONFIG_PM_DEBUG > - > -extern int pm_print_times_enabled; > -#define pm_print_times (initcall_debug || pm_print_times_enabled) > - > -#else /* CONFIG_PM_DEBUG */ > - > -#define pm_print_times initcall_debug > - > -#endif /* CONFIG_PM_DEBUG */ -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html