linux-kernel - Re: [PATCH] kernel.h: Add printk_ratelimited and pr_<level>

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Message-ID: <4AF89779.9090601@oracle.com>
Date:	Mon, 09 Nov 2009 14:28:09 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Joe Perches <joe@...ches.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Naohiro Ooiwa <nooiwa@...aclelinux.com>,
	Ingo Molnar <mingo@...e.hu>,
	Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>,
	roland@...hat.com, Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>, oleg@...hat.com
Subject: Re: [PATCH] kernel.h: Add printk_ratelimited and pr_<level>_rl

Joe Perches wrote:
> On Mon, 2009-11-09 at 13:49 -0800, Andrew Morton wrote:
>> On Fri, 30 Oct 2009 16:21:47 -0700
>> Joe Perches <joe@...ches.com> wrote:
>>> +#define pr_emerg_rl(fmt, ...) \
>>> +        printk_ratelimited(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__)
>>> +#define pr_alert_rl(fmt, ...) \
>>> +        printk_ratelimited(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
>>> +#define pr_crit_rl(fmt, ...) \
>>> +        printk_ratelimited(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__)
>>> +#define pr_err_rl(fmt, ...) \
>>> +        printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
>>> +#define pr_warning_rl(fmt, ...) \
>>> +        printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
>>> +#define pr_notice_rl(fmt, ...) \
>>> +        printk_ratelimited(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
>>> +#define pr_info_rl(fmt, ...) \
>>> +        printk_ratelimited(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
>> Would prefer pr_emerg_ratelimited personally.  It's longer, but one
>> doesn't ask "wtf does _rl" mean and it avoids having two identifiers
>> which refer to the same thing.
> 
> I don't have a strong opinion either way.
> _rl is shorter and that has some value.

but we have a long history of not using cryptic abbreviations,
so I agree with Andrew.

> I think pr_crit_rl, pr_emerg_rl and pr_alert_rl likely
> aren't useful.  Is there a sensible use case for those?

Not likely.

> I added them for completeness, but...

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