linux-kernel - Re: [PATCH -v3.1 1/2] ratelimit: Extend to print suppressed messages on release

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Date:	Wed, 06 Jul 2016 07:50:41 -0700
From:	Joe Perches <joe@...ches.com>
To:	Borislav Petkov <bp@...en8.de>, LKML <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Franck Bui <fbui@...e.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Subject: Re: [PATCH -v3.1 1/2] ratelimit: Extend to print suppressed
 messages on release

On Wed, 2016-07-06 at 15:28 +0200, Borislav Petkov wrote:
> Extend the ratelimiting facility to print the amount of suppressed lines
> when it is being released.
[]
> diff --git a/include/linux/ratelimit.h b/include/linux/ratelimit.h
[]
> +static inline void ratelimit_state_exit(struct ratelimit_state *rs)
> +{
> +	if (!(rs->flags & RATELIMIT_MSG_ON_RELEASE))
> +		return;
> +
> +	if (rs->missed)
> +		printk(KERN_WARNING "%s: %d output lines suppressed due to ratelimiting\n",
> +		       current->comm, rs->missed);

Please use pr_warn as it will use whatever
pr_fmt prefix is specified by the subsystem.

Maybe:
	if (rs->missed)
		pr_warn("ratelimit: %s: %d output lines suppressed\n",
			current->comm, rs->missed);

to be more similar to the callback suppressed message in
lib/ratelimit.c

				pr_warn("%s: %d callbacks suppressed\n", func, rs->missed);