linux-kernel - Re: [folded] kernelh-add-printk_ratelimited-and-pr_level

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Date:	Tue, 15 Dec 2009 17:44:55 -0500
From:	Valdis.Kletnieks@...edu
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	akpm@...ux-foundation.org, h-shimamoto@...jp.nec.com,
	joe@...ches.com, mingo@...e.hu, nooiwa@...aclelinux.com,
	mm-commits@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [folded] kernelh-add-printk_ratelimited-and-pr_level_rl-rename.patch removed from -mm tree

On Tue, 15 Dec 2009 11:28:02 +0100, Peter Zijlstra said:
> On Mon, 2009-12-14 at 17:08 -0800, akpm@...ux-foundation.org wrote:
> > s/_rl/_ratelimited/g
> 
> do we feel this pr_* wankery is worth the hassle? I'd as soon send a
> patch removing all this crap.

pr_foo() instead of printk(KERN_FOO) is probably worth the hassle, as it
allows more selective inclusion of messages if you're trying to build an
embedded kernel.  It's easy to say "I want pr_warning() to stay in, but
lower levels compile to nothing". Trying to keep a 'printk(KERN_WARNING'
while making a printk(KERN_DEBUG go away is just asking for some truly
astounding pre-processor gyrations.

Not an issue for my laptop with 4G of RAM - byt my cell phone says it has
26M of memory, 7M used (presumably all the software, my contact list isn't
*that* big).  No idea what the actual kernel is, but I know whatever it is,
the coders were using that kernel's equivalent of CONFIG_EMBEDDED and tossing
stuff over the side if they didn't need it. ;)

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