linux-kernel - Re: [PATCH 1/3] perf: add calls to suspend trace point

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Message-ID: <20110104112919.GB9879@atrey.karlin.mff.cuni.cz>
Date:	Tue, 4 Jan 2011 12:29:20 +0100
From:	Pavel Machek <pavel@....cz>
To:	jean.pihet@...oldbits.com
Cc:	mingo@...e.hu, trenn@...e.de, Len Brown <len.brown@...el.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org,
	Arjan van de Ven <arjan@...ux.intel.com>,
	linux-perf-users@...r.kernel.org, Jean Pihet <j-pihet@...com>
Subject: Re: [PATCH 1/3] perf: add calls to suspend trace point

Hi!

> Uses the machine_suspend trace point, called from the
> generic kernel suspend_enter function.
> 
> Signed-off-by: Jean Pihet <j-pihet@...com>
> CC: Thomas Renninger <trenn@...e.de>
> ---
>  kernel/power/suspend.c |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
> index ecf7705..0650596 100644
> --- a/kernel/power/suspend.c
> +++ b/kernel/power/suspend.c
> @@ -22,6 +22,7 @@
>  #include <linux/mm.h>
>  #include <linux/slab.h>
>  #include <linux/suspend.h>
> +#include <trace/events/power.h>
>  
>  #include "power.h"
>  
> @@ -164,7 +165,9 @@ static int suspend_enter(suspend_state_t state)
>  	error = sysdev_suspend(PMSG_SUSPEND);
>  	if (!error) {
>  		if (!suspend_test(TEST_CORE) && pm_check_wakeup_events()) {
> +			trace_machine_suspend(state);
>  			error = suspend_ops->enter(state);
> +			trace_machine_suspend(PWR_EVENT_EXIT);
>  			events_check_enabled = false;
>  		}
>  		sysdev_resume();

Ok... why this place? I mean, perhaps suspend time should include
device suspend?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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