linux-kernel - Re: Timer cleanups

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Date:	Sun, 17 Feb 2008 17:38:42 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Pavel Machek <pavel@....cz>
cc:	kernel list <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: Timer cleanups

On Tue, 5 Feb 2008, Pavel Machek wrote:
> 
> Add anotations, so that timertop produces nicer results. Relative
> expiry time can get negative, so it should be signed.
> 
> Signed-off-by: Pavel Machek <Pavel@...e.cz>

Please do not mix patches for arch / generic code 

> diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
> index 429d084..235fd6c 100644
> --- a/arch/x86/kernel/hpet.c
> +++ b/arch/x86/kernel/hpet.c
> @@ -368,8 +368,8 @@ static int hpet_clocksource_register(voi
>  	return 0;
>  }
>  
> -/*
> - * Try to setup the HPET timer
> +/**
> + * hpet_enable - Try to setup the HPET timer. Returns 1 on success.
>   */
>  int __init hpet_enable(void)
>  {

Applied to x86.

> diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
> index d3d94c1..0fab3ca 100644
> --- a/kernel/time/timer_list.c
> +++ b/kernel/time/timer_list.c
> @@ -65,9 +65,9 @@ #ifdef CONFIG_TIMER_STATS
>  	SEQ_printf(m, ", %s/%d", tmp, timer->start_pid);
>  #endif
>  	SEQ_printf(m, "\n");
> -	SEQ_printf(m, " # expires at %Lu nsecs [in %Lu nsecs]\n",
> +	SEQ_printf(m, " # expires at %Lu nsecs [in %Ld nsecs]\n",
>  		(unsigned long long)ktime_to_ns(timer->expires),
> -		(unsigned long long)(ktime_to_ns(timer->expires) - now));
> +		(long long)(ktime_to_ns(timer->expires) - now));
>  }

Applied to -hrt.

>  static void
> diff --git a/kernel/workqueue.c b/kernel/workqueue.c
> index 52db48e..6cbec10 100644
> --- a/kernel/workqueue.c
> +++ b/kernel/workqueue.c
> @@ -219,6 +219,7 @@ int queue_delayed_work_on(int cpu, struc
>  	struct timer_list *timer = &dwork->timer;
>  	struct work_struct *work = &dwork->work;
>  
> +	timer_stats_timer_set_start_info(&dwork->timer);
>  	if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work))) {
>  		BUG_ON(timer_pending(timer));
>  		BUG_ON(!list_empty(&work->entry));
> @@ -580,6 +581,7 @@ EXPORT_SYMBOL(schedule_delayed_work);
>  int schedule_delayed_work_on(int cpu,
>  			struct delayed_work *dwork, unsigned long delay)
>  {
> +	timer_stats_timer_set_start_info(&dwork->timer);
>  	return queue_delayed_work_on(cpu, keventd_wq, dwork, delay);
>  }
>  EXPORT_SYMBOL(schedule_delayed_work_on);

Makes sense to see the call site of schedule_delayed_work in the
stats. Applied to hrt.

Thanks,

	tglx
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