linux-kernel - Re: [PATCH] Rate-limit the RTC 'missed interrupts' warning.

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Date:	Fri, 4 Aug 2006 22:49:13 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Matthias Urlichs <smurf@...rf.noris.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Rate-limit the RTC 'missed interrupts' warning.

On Sat, 5 Aug 2006 01:53:08 +0200
Matthias Urlichs <smurf@...rf.noris.de> wrote:

> Cc: recipient list not shown: ;

I'm assuming there was supposed to be a mailing list there.

> Subject: [PATCH] Rate-limit the RTC 'missed interrupts' warning.
> Date: Sat, 5 Aug 2006 01:53:08 +0200
> 
> Signed-Off-By: Matthias Urlichs <smurf@...rf.noris.de>
> ---
>  drivers/char/rtc.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
> index 7cac6d0..fbd214f 100644
> --- a/drivers/char/rtc.c
> +++ b/drivers/char/rtc.c
> @@ -1131,7 +1131,8 @@ static void rtc_dropped_irq(unsigned lon
>  
>  	spin_unlock_irq(&rtc_lock);
>  
> -	printk(KERN_WARNING "rtc: lost some interrupts at %ldHz.\n", freq);
> +	if(printk_ratelimit())
> +		printk(KERN_WARNING "rtc: lost some interrupts at %ldHz.\n", freq);
>  
>  	/* Now we have new data */
>  	wake_up_interruptible(&rtc_wait);

What is causing your machine to lose so many RTC interrupts?
-
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