Date: Fri, 29 Jun 2012 14:58:45 +0200
From: Ingo Molnar <mingo@kernel.org>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Kay Sievers <kay@vrfy.org>, Steven Rostedt <rostedt@goodmis.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org,
        Greg Kroah-Hartmann <greg@kroah.com>,
        Lennart Poettering <lennart@poettering.net>
Subject: Re: cosmetic printk() issue with lockdep warning in
 arch/x86/kernel/alternative.c
Message-ID: <20120629125845.GA32730@gmail.com>
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* Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:

> On Wed, 2012-06-27 at 12:49 +0200, Kay Sievers wrote:
> > All we want is a reliable printk
> 
> We too, but we define reliable differently. I want printk() to 
> dump data ASAP so that it has better chance to get out of the 
> system and onto my console in case of a crash. I don't give a 
> rats arse about interleaved text, any text is better than no 
> text.

I actually *fixed* bugs in the past when I saw interleaved text 
printed from multiple CPUs, it told me how narrow and SMP 
dependent a particular race/crash was.

So even interleaving, although annoying most of the time, can be 
useful in some other places.

Thanks,

	Ingo
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