linux-kernel - Re: [PATCH] ALSA: pcm: 'BUG:' message unnecessarily triggers kerneloops

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Message-ID: <s5hha5zopta.wl%tiwai@suse.de>
Date:	Fri, 11 Apr 2014 17:20:49 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Tim Gardner <tim.gardner@...onical.com>
Cc:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	Jaroslav Kysela <perex@...ex.cz>,
	Mark Brown <broonie@...aro.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	JongHo Kim <furmuwon@...il.com>
Subject: Re: [PATCH] ALSA: pcm: 'BUG:' message unnecessarily triggers kerneloops

At Thu, 10 Apr 2014 10:45:08 -0600,
Tim Gardner wrote:
> 
> BugLink: http://bugs.launchpad.net/bugs/1305480
> 
> The kerneloops-daemon scans dmesg for common crash signatures, among
> which is 'BUG:'. The message emitted by the PCM library is really a
> warning, so the most expedient thing to do seems to be to change the
> string.
> 
> Cc: Jaroslav Kysela <perex@...ex.cz>
> Cc: Takashi Iwai <tiwai@...e.de>
> Cc: Mark Brown <broonie@...aro.org>
> Cc: Lars-Peter Clausen <lars@...afoo.de>
> Cc: JongHo Kim <furmuwon@...il.com>
> Signed-off-by: Tim Gardner <tim.gardner@...onical.com>
> ---
>  sound/core/pcm_lib.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
> index ce83def..2a0563d 100644
> --- a/sound/core/pcm_lib.c
> +++ b/sound/core/pcm_lib.c
> @@ -345,7 +345,7 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream,
>  			snd_pcm_debug_name(substream, name, sizeof(name));
>  			xrun_log_show(substream);
>  			pcm_err(substream->pcm,
> -				"BUG: %s, pos = %ld, buffer size = %ld, period size = %ld\n",
> +				"OVER RUN: %s, pos = %ld, buffer size = %ld, period size = %ld\n",

Use a term "XRUN", as it's not always an overrun.


thanks,

Takashi
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