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To: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@elte.hu>, Stephen Rothwell <sfr@canb.auug.org.au>,
       Steven Rostedt <rostedt@goodmis.org>, linux-kernel@vger.kernel.org,
       Frederic Weisbecker <fweisbec@gmail.com>
Subject: Re: [PATCH 5/5] ring-buffer: fix printk output
In-Reply-To: Your message of "Tue, 28 Apr 2009 23:20:00 PDT."
             <20090428232000.6c3d4ce1.akpm@linux-foundation.org>
From: Valdis.Kletnieks@vt.edu
References: <20090429044814.138790038@goodmis.org> <20090429045908.394874083@goodmis.org> <20090428222024.8db50539.akpm@linux-foundation.org> <20090429054359.GA6148@elte.hu> <20090428225541.9ca61a12.akpm@linux-foundation.org> <20090429060955.GD6148@elte.hu>
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Date: Wed, 29 Apr 2009 12:19:03 -0400
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On Tue, 28 Apr 2009 23:20:00 PDT, Andrew Morton said:
> printk_once() is racy on smp and preempt btw ;)

Looks like at worst, it's prone to the usual printk racing, plus a possible
misfire causing it to print twice before shutting up?  Or is there something
I'm missing here?

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